This application claims priority to German patent application No. 10 2021 202 482.3, filed on Mar. 15, 2021, which is hereby incorporated by reference.
The technical field relates to a regulating device and to a method for regulating the steering angle of a vehicle.
Electromechanical steering systems for vehicles (also EPS: Electric Power Steering) are in principle known. A program-controlled electric actuator supports and superposes the steering movements of the driver by transferring forces to the steering mechanics.
In addition, it is known that electromechanical steering systems have regulating devices in order to moderate or suppress disturbing influences during automated driving (within the framework of SAE Level 2 and higher). Such regulating devices have an integrating regulating component in order to compensate for the transverse forces building up.
Known regulating devices have an interface via which the control behavior can be adjusted. As a result, the control behavior can be adjusted to the driving condition or the respective driving situation.
It is problematic that it is not possible to influence the control behavior in the manner described if the regulating device does not have such an interface or the construction of the regulating device is not known and it is therefore not possible to adjust the control behavior in a manner that depends on the driving situation. Thus, loading integrating components in the steering angle regulation can then, for example, continue to cause unwanted vehicle behavior.
As such, it is desirable to present a regulating device which makes it possible to influence the regulating behavior of the steering angle regulation even if no interface with such influencing is provided.
According to a first aspect, the disclosure relates to a regulating device for regulating the steering angle of a vehicle. The regulating device comprises a first controller unit, the regulating behavior of which has at least one integrating component. The first controller unit may form the basic steering angle regulation, the control behavior of which is to be adjusted. It comprises the controller which provides a manipulated variable, the actuator which receives the manipulated variable, and the mechanical components of the steering. In addition, a controller superposed on the first controller unit is provided. This superposed controller is configured to alter the regulating behavior of the superposed first controller unit. The superposed controller has a feedback path and a prefilter. The feedback path is configured to provide a first adjustment variable based on actual steering angle information which is provided by the first controller unit as an output variable. The prefilter is configured to provide a second adjustment variable based on nominal steering angle information. In addition, the superposed controller is designed to form input information for the first controller unit based on the first and the second adjustment variable. The feedback path has a first correction element, the transfer behavior of which can be adjusted based on at least one control variable. The prefilter has a second correction element, the transfer behavior of which can be adjusted based on at least one control variable. The superposed controller is configured in such a way that at least the controller gain of the first controller unit can be adjusted based on the control variable. The expression “at least the control gain can be adjusted” within the meaning of the present disclosure means that the transfer behavior is either exclusively changed by changing a gain factor of the first controller unit in the form of a rational number or by applying a complex filter function.
The technical advantage of the regulating device according to the disclosure is that an adjustment of the controller gain or of the transfer behavior of the first controller unit can be achieved by the superposed controller based on a control variable although this does not itself offer any direct possibility of exerting influence in order to adjust the controller gain or the transfer behavior. In other words, the same result is achieved by influencing the input information supplied to the first controller unit as if the controller gain or the transfer behavior of the first controller unit itself can be directly altered by the control variable. This makes it possible to improve the regulating behavior in particular in such a way that oscillations can be avoided and disturbing influences of the integrating regulating component can be reduced.
According to an exemplary embodiment, the first correction element is configured to multiply the actual steering angle information by a factor dependent on the control variable or a complex filter function. In other words, the first correction element therefore receives the output information which is provided by the first controller unit as actual steering angle information and modifies said information based on the control variable to produce a first adjustment variable, based on which the input information which is supplied to the first controller unit is modified.
According to an exemplary embodiment, the factor is (1−P(s)), wherein P(s) is a correction factor dependent on the control signal s, the value of which correction factor indicates the adjustment of the controller gain of the first controller unit, or wherein P(s) is a complex filter function dependent on the control signal. By using this factor or such a function, it is possible to adjust the controller gain or the transfer behavior of the first controller unit from outside, without directly influencing the first controller unit itself.
According to an exemplary embodiment, the second correction element is configured to multiply the nominal steering angle information by a factor dependent on the control variable or a complex filter function. In other words, the second correction element therefore receives the steering angle information which is provided by a superposed control unit, for example a control unit of a driving assistance system, and modifies said information based on the control variable to produce a second adjustment variable. The adjustment variable in turn influences the input information which is supplied to the first controller unit.
According to an exemplary embodiment, the factor used in the second correction element is (1−P(s)), wherein P(s) is a correction factor dependent on the control signal s, the value of which correction factor indicates the adjustment of the controller gain of the first controller unit, or wherein P(s) is a complex filter function dependent on the control signal. This in turn makes it possible to adjust the controller gain or the transfer behavior of the first controller unit from outside, without directly influencing the first controller unit itself.
According to another exemplary embodiment, the factor used in the second correction element is P(s), wherein P(s) is a correction factor dependent on the control signal s, the value of which correction factor indicates the adjustment of the controller gain of the first controller unit, or wherein P(s) is a complex filter function dependent on the control signal. By using this factor, an adjustment of the controller gain or of the transfer behavior of the first controller unit is also possible from outside, without directly influencing the first controller unit itself.
According to an exemplary embodiment, a summation point is provided, at which the first adjustment variable is added to the nominal steering angle information and at which the second adjustment variable is subtracted from the nominal steering angle information, wherein the output information of the summation point forms the input variable of the first controller unit. Thanks to the adjustment of the nominal steering angle information occasioned therewith, an indirect adjustment of the controller gain of the first controller unit from outside is possible.
According to another exemplary embodiment, a summation point is provided, at which the first adjustment variable and the second adjustment variable are added, wherein the output information of the summation point forms the input variable of the first controller unit. Due to the adjustment of the nominal steering angle information occasioned therewith, a further alternative to the indirect adjustment of the controller gain of the first controller unit from outside is made possible.
According to an exemplary embodiment, the first and second correction element can be adjusted based on the identical control variable. As a result, a simplified regulating device can be achieved.
According to an exemplary embodiment, the first controller unit is a self-contained controller unit which does not have an external interface via which the controller gain of the first controller unit can be adjusted. In other words, the first controller unit forms a so-called black box, the control behavior of which cannot be adjusted externally so that a situation-dependent change in the control behavior would be possible. However, the controller superposed on the first controller unit as a subordinate controller unit makes it possible to compensate for the absence of such an interface by an external control loop.
According to an exemplary embodiment, the control variable is dependent on at least one of the following items of information:
According to an exemplary embodiment, the controller gain can be adjusted by the control variable in the range of values between 0.2 and 3, in particular between 0.6 and 1.5. As a result, the desired influence on the control behavior can be advantageously achieved.
According to a further aspect, the disclosure relates to a method for regulating the steering angle of a vehicle by means of a first controller unit, the regulating behavior of which has at least one integrating component. A controller superposed on the first controller unit is provided, which has a feedback path and a prefilter. The feedback path provides a first adjustment variable based on actual steering angle information which is provided by the first controller unit as an output variable. The prefilter provides a second adjustment variable based on nominal steering angle information. The superposed controller provides input information for the first controller unit based on the first and the second adjustment variable. The feedback path has a first correction element, the transfer behavior of which is adjusted based on at least one control variable. The prefilter has a second correction element, the transfer behavior of which is adjusted based on at least one control variable. At least the controller gain of the first controller unit is adjusted by means of the superposed controller based on the control variable.
According to an embodiment of the method, the first controller unit is a self-contained controller unit which does not have an external interface via which the controller gain and/or the transfer function of the first controller unit can be adjusted. The controller gain and/or the transfer function of the first controller unit is/are set by an adjustment of the nominal steering angle information and an adjustment of fed-back actual steering angle information depending on the control variable. This makes it possible to indirectly adjust the controller gain and/or the transfer function of the first controller unit from outside.
The term “superposed controller” is understood to be at least one part of a control circuit which influences the input information of a subordinate controller unit, i.e., a lower regulating structure viewed in terms of hierarchy. The superposed controller can in particular use a signal or information from the subordinate controller unit in order to influence the control behavior of the subordinate controller unit as a result.
Within the meaning of the disclosure, the expressions “approximately”, “substantially” or “roughly” mean deviations from the exact value in each case by +/−10%, preferably by +/−5% and/or deviations in the form of changes which are insignificant to the function.
Further developments, advantages and possible applications are set out by the following description of exemplary embodiments and by the figures. All of the features described and/or pictured per se or in any combination are fundamentally the subject-matter of the invention, independently of their combination in the claims or references back thereto. The content of the claims is also made an integral part of the description.
The disclosure is explained in greater detail below on the basis of the figures with reference to exemplary embodiments, wherein:
In the block wiring diagram, the block designated with R represents the steering angle controller which provides a manipulated variable for the electromechanical steering device EPS. The electromechanical steering device EPS comprises both the steering mechanics and the actuator.
The first controller unit 2 obtains, for example, the nominal steering angle φsoll which is provided for example by an electronic control unit, in particular a computer unit controlling an autonomous or partially autonomous driving function, as input information. The term “nominal steering angle information” is also used here for the nominal steering angle φsoll.
The subtraction point of the first controller unit 2, at which a control difference is formed from the nominal steering angle φsoll and the actual steering angle φ, also referred to below as the actual steering angle information, is followed by a steering angle controller R for example, which provides for example a nominal actuating torque from the control difference as the manipulated variable. The steering angle controller R can be, for example, a PID controller. The steering angle controller R has an integrating component. This integrating component can lead to undesired driving behavior, for example oscillating steering movements. These oscillating steering movements lead to twitchy driving behavior and represent unnatural driving behavior for the driver, which is mostly perceived as disturbing.
The first controller unit 2 is for example a self-contained or enclosed controller unit which does not make possible an interface for supplying external control signals, via which the control behavior could be influenced in a manner that depends on the driving conditions, the situation and/or depending on driving commands of the human driver. Consequently, it is not possible to compensate for the disturbing control behavior arising inter alia from the integrating component directly at the first controller unit 2.
In other driving situations, in particular during time-critical maneuvering such as for example emergency avoiding maneuvers, it is possible to increase the controller gain P(s) in order to be able to react more dynamically to the respective driving situation. It is understood that, to this end, the steering angle regulation should have sufficient dynamics in order to avoid instabilities in the control behavior.
However, due to the above-described configuration of the first controller unit 2 as a self-contained or enclosed controller unit, it is not directly possible to alter the controller gain P(s) based on a control signal s.
The regulating device 1 comprises, in addition to the first controller unit 2, a superposed controller 7, by means of which an adjustment of the controller gain P(s) depending on the control variable s is made possible. The superposed controller 7 has a feedback path 3 and a prefilter 4. The feedback path 3 connects the output interface of the first controller unit 2, at which the actual steering angle information φ is provided, to a summation point 5, which is coupled on the output side to the input interface of the first controller unit 2.
In the feedback path 3, a first correction element 3.1 is provided, the transfer behavior of which can be adjusted by the control variable s. The transfer function H of the first correction element 3.1 can, for example, be characterized by the following function:
H=1−P(s).
P(s) is the controller gain which is to be attained in the first controller unit 2 and s indicates the control variable. The feedback path 3 provides a first adjustment variable A1 which is supplied to the summation point 5 and is added there to the nominal steering angle information φsoll.
The prefilter 4 has a second correction element 4.1, the transfer behavior of which can likewise be adjusted by the control variable s. The transfer function H of the second correction element 4.1 can, for example, be characterized by the following function:
H=1−P(s).
P(s) is the controller gain which is to be attained in the first controller unit 2 and s indicates the control variable. The prefilter 4 provides a second adjustment variable A2 which is likewise supplied to the summation point 5 and is subtracted there from the nominal steering angle information φsoll.
In the exemplary embodiment according to
By influencing the input information, which has been adjusted by feedback from, and a modification of, the actual steering angle information φ and a modification of the nominal steering angle information φsoll supplied to the first controller unit 2, the desired control behavior can therefore be achieved with a controller gain which can be altered depending on the situation.
In addition to the first controller unit 2, the regulating device 1 comprises in turn a superposed controller 7, by means of which an adjustment of the controller gain P(s) is made possible depending on the control variable s. The superposed controller 7 has a feedback path 3 and a prefilter 4. The feedback path 3 connects the output interface of the first controller unit 2, at which the actual steering angle information φ is provided, to a summation point 6 which is coupled on the output side to the input interface of the first controller unit 2.
In the feedback path 3, a first correction element 3.1 is provided, the transfer behavior of which can be adjusted by the control variable s. The transfer function H of the first correction element 3.1 can, for example, be characterized by the following function:
H=1−P(s).
P(s) is the controller gain which is to be attained in the first controller unit 2 and s indicates the control variable. The feedback path 3 provides a first adjustment variable A1 which is supplied to the summation point 6 and is added there to the modified nominal steering angle information.
The prefilter 4 has a second correction element 4.1, the transfer behavior of which can likewise be adjusted by the control variable s. The transfer function H of the second correction element 4.1 can, for example, be characterized by the following function:
H=P(s).
P(s) is the controller gain which is to be attained in the first controller unit 2 and s indicates the control variable. The prefilter 4 provides a second adjustment variable A2 which is supplied to the summation point 6 as modified nominal steering angle information. In other words, the first and the second adjustment variable A1, A2 are thus added at the summation point 6 and the resulting sum information of the first controller unit 2 is provided as input information.
The consequence of the modification of the input information by the superposed controller 7 is in turn that the first controller unit 2 has a controller gain P(s) which can be altered based on the control variable s. In other words, the regulating device 1 shown in
By influencing the input information, which has been adjusted by feedback from, and a modification of, the actual steering angle information φ and a modification of the nominal steering angle information φsoll supplied to the first controller unit 2, the desired control behavior can therefore be achieved with a controller gain which can be altered depending on the situation.
One or more of the items of information indicated below can be used as the control variable s:
The controller gain P(s) can be altered within a range of values of Pmin<P(s)<Pmax. In this case, Pmin can for example have a value of 0.2, in particular a value of 0.6 and Pmax can for example have a value of 3, in particular a value of 1.5.
It has been assumed above that the factor altered by the first and second correction element is the controller gain P(s), i.e., a rational number, via which the gain factor of the first controller unit 2 can be modified.
Deviating from this, the factor can also be formed by a complex filter function, with the aid of which the transfer behavior of the first controller unit 2, i.e., of the steering angle regulation, is modified from outside by a corresponding specification.
Complex filter functions are considered especially if, for example, excessive increases of the resonance of the EPS steering angle controller, for example brought about by too low a phase reserve, are to be subsequently or deliberately reduced. As a result, the amplitude of the vibration of the steering wheel and, therefore, also the characteristic values of the lateral oscillation of the vehicle can be favorably influenced during lane guidance. The simplest of the filter functions suitable for this purpose is a filter having high-pass behavior, as represented for example by a PD element. With the aid of the control variable s, the position of the zero of the PD element and, therefore, the degree of vibration damping can be varied. In addition, the gain factor of the PD element can furthermore be altered, with which the degree of vibration damping can likewise be influenced.
If the dynamics of the first controller unit 2 are to be increased depending on the driving situation, specifying the control variable s, a higher gain factor P can be chosen, for stability reasons, only up to a certain upper natural limit. If, nevertheless, a circular gain above the natural limit is required, it is advantageous if, instead of a gain factor in the form of a rational number for P(s), a complex filter function is used, the poles and zeros of which are to be chosen, taking into account control engineering stability criteria (e.g., Nyquist criterion). In most cases, this requires the design of filter zeros in such a way that the phase response of the open angle control circuit is raised in the region of the penetration frequency. In the simplest case, the filter function is then represented by a transfer element having two zeros and, due to the technical feasibility, also represented with two poles. Applications for the temporary implementation of higher steering angle controller dynamics are, for example, dynamic emergency avoiding maneuvers, for the execution of which higher angle dynamics can be required than specified by the design of the first controller unit 2.
The invention has been described above with reference to exemplary embodiments. It is understood that numerous changes and variations are possible, without departing from the scope of protection defined by the claims.
Number | Date | Country | Kind |
---|---|---|---|
10 2021 202 482.3 | Mar 2021 | DE | national |
Number | Name | Date | Kind |
---|---|---|---|
4657102 | Kanazawa | Apr 1987 | A |
4683972 | Foerster | Aug 1987 | A |
4836319 | Haseda | Jun 1989 | A |
5321616 | Okuda | Jun 1994 | A |
5373444 | Takahashi | Dec 1994 | A |
5386365 | Nagaoka | Jan 1995 | A |
5457632 | Tagawa | Oct 1995 | A |
5740040 | Kifuku | Apr 1998 | A |
5754966 | Ichikawa | May 1998 | A |
5845738 | Nishino | Dec 1998 | A |
5853064 | Hackl | Dec 1998 | A |
5927430 | Mukai | Jul 1999 | A |
6079513 | Nishizaki | Jun 2000 | A |
6082482 | Kato | Jul 2000 | A |
6112845 | Oyama | Sep 2000 | A |
6219604 | Dilger | Apr 2001 | B1 |
6334503 | Fukumura | Jan 2002 | B1 |
6370459 | Phillips | Apr 2002 | B1 |
6380706 | Kifuku | Apr 2002 | B1 |
6381525 | Hori | Apr 2002 | B1 |
6474436 | Konigorski | Nov 2002 | B1 |
6871127 | Dominke | Mar 2005 | B2 |
6883637 | Nishizaki | Apr 2005 | B2 |
7092805 | Kasahara | Aug 2006 | B2 |
7584819 | Hidaka | Sep 2009 | B2 |
8010253 | Lundquist | Aug 2011 | B2 |
8340871 | Suzuki | Dec 2012 | B2 |
8855857 | Shinoda | Oct 2014 | B2 |
9550524 | Takeda | Jan 2017 | B2 |
9586619 | Akatsuka | Mar 2017 | B1 |
10131377 | Minaki | Nov 2018 | B2 |
10144448 | Minaki | Dec 2018 | B2 |
10427712 | Kunihiro | Oct 2019 | B2 |
10457322 | Yoshida | Oct 2019 | B2 |
10562562 | Tsubaki | Feb 2020 | B2 |
10562568 | Namikawa | Feb 2020 | B2 |
10604151 | Kim | Mar 2020 | B2 |
10661796 | Hajika | May 2020 | B2 |
10829153 | Taniguchi | Nov 2020 | B1 |
11027777 | Irie | Jun 2021 | B2 |
11685430 | Yoshida | Jun 2023 | B2 |
11754402 | Tanaka | Sep 2023 | B2 |
20010017229 | Kada | Aug 2001 | A1 |
20010027364 | Matsuoka | Oct 2001 | A1 |
20020005314 | Takehara | Jan 2002 | A1 |
20020013647 | Kawazoe | Jan 2002 | A1 |
20020022912 | Urabe | Feb 2002 | A1 |
20020092700 | Kim | Jul 2002 | A1 |
20030052639 | Tanaka | Mar 2003 | A1 |
20040060765 | Mattson | Apr 2004 | A1 |
20040186640 | Norito | Sep 2004 | A1 |
20040262072 | Hara | Dec 2004 | A1 |
20050004731 | Bohm | Jan 2005 | A1 |
20050080532 | Kato | Apr 2005 | A1 |
20050205339 | Aizawa | Sep 2005 | A1 |
20050228564 | Kato | Oct 2005 | A1 |
20050273236 | Mori | Dec 2005 | A1 |
20060041356 | Shirato | Feb 2006 | A1 |
20060042859 | Itoh | Mar 2006 | A1 |
20060080016 | Kasahara | Apr 2006 | A1 |
20060090952 | Ito | May 2006 | A1 |
20070096672 | Endo | May 2007 | A1 |
20080021614 | Endo | Jan 2008 | A1 |
20080027609 | Aoki | Jan 2008 | A1 |
20080119988 | Yasui | May 2008 | A1 |
20080251312 | Goto | Oct 2008 | A1 |
20090095562 | Yasui | Apr 2009 | A1 |
20090105907 | Yamaguchi | Apr 2009 | A1 |
20090222169 | Held | Sep 2009 | A1 |
20100004825 | Nakano | Jan 2010 | A1 |
20100094505 | Kariatsumari | Apr 2010 | A1 |
20100217487 | Murakami | Aug 2010 | A1 |
20110001441 | Kariatsumari | Jan 2011 | A1 |
20110098888 | Kariatsumari | Apr 2011 | A1 |
20110276229 | Sugawara | Nov 2011 | A1 |
20120046832 | Kariatsumari | Feb 2012 | A1 |
20120097470 | Yamasaki | Apr 2012 | A1 |
20120271513 | Yoneda | Oct 2012 | A1 |
20120277956 | Sasaki | Nov 2012 | A1 |
20120296525 | Endo | Nov 2012 | A1 |
20130060427 | Kataoka | Mar 2013 | A1 |
20130066521 | Watanabe | Mar 2013 | A1 |
20130144493 | Hayama | Jun 2013 | A1 |
20130238196 | Seto | Sep 2013 | A1 |
20140019008 | Nakamura | Jan 2014 | A1 |
20140081524 | Tamaizumi | Mar 2014 | A1 |
20140121905 | Kluge | May 2014 | A1 |
20140129086 | Takenaka | May 2014 | A1 |
20140188342 | Takenaka | Jul 2014 | A1 |
20140230533 | Greul | Aug 2014 | A1 |
20140297122 | Kouchi | Oct 2014 | A1 |
20140303850 | Chai | Oct 2014 | A1 |
20140316658 | Chai | Oct 2014 | A1 |
20140343794 | Tamaizumi | Nov 2014 | A1 |
20150025745 | Tamura | Jan 2015 | A1 |
20150057889 | Tamaizumi | Feb 2015 | A1 |
20150057892 | Tamaizumi | Feb 2015 | A1 |
20150191199 | Tsubaki | Jul 2015 | A1 |
20150191200 | Tsubaki | Jul 2015 | A1 |
20150246686 | Takeda | Sep 2015 | A1 |
20150274203 | Takeda | Oct 2015 | A1 |
20150353124 | Chai | Dec 2015 | A1 |
20160001810 | Tsubaki | Jan 2016 | A1 |
20160075373 | Fukukawa | Mar 2016 | A1 |
20160129934 | Akatsuka | May 2016 | A1 |
20160159389 | Kuramitsu | Jun 2016 | A1 |
20160229447 | Wada | Aug 2016 | A1 |
20160280256 | Wei | Sep 2016 | A1 |
20170021858 | Kodera | Jan 2017 | A1 |
20170021859 | Kodera | Jan 2017 | A1 |
20170066475 | Kudo | Mar 2017 | A1 |
20170066476 | Kudo | Mar 2017 | A1 |
20170080969 | Ieyasu | Mar 2017 | A1 |
20170088166 | Kunihiro | Mar 2017 | A1 |
20170113720 | Kodera | Apr 2017 | A1 |
20170137057 | Kitazume | May 2017 | A1 |
20170158238 | Takaso | Jun 2017 | A1 |
20170166243 | Sugawara | Jun 2017 | A1 |
20170183027 | Kimura | Jun 2017 | A1 |
20170217477 | Akatsuka | Aug 2017 | A1 |
20170259849 | Fukukawa | Sep 2017 | A1 |
20170274928 | Minaki | Sep 2017 | A1 |
20170297614 | Minaki | Oct 2017 | A1 |
20170305459 | Minaki | Oct 2017 | A1 |
20180037256 | Maeda | Feb 2018 | A1 |
20180111642 | Endo | Apr 2018 | A1 |
20180134310 | Benak | May 2018 | A1 |
20180178838 | Inoue | Jun 2018 | A1 |
20180181130 | Inoue | Jun 2018 | A1 |
20180186406 | Itou | Jul 2018 | A1 |
20180201306 | Tsubaki | Jul 2018 | A1 |
20180201317 | Kudo | Jul 2018 | A1 |
20180257700 | Ishikawa | Sep 2018 | A1 |
20180281849 | Irie | Oct 2018 | A1 |
20180304918 | Kunihiro | Oct 2018 | A1 |
20180312169 | Harai | Nov 2018 | A1 |
20180354549 | Tsubaki | Dec 2018 | A1 |
20190009779 | Kim | Jan 2019 | A1 |
20190084613 | Tsubaki | Mar 2019 | A1 |
20190161116 | Moreillon | May 2019 | A1 |
20190168801 | Takase | Jun 2019 | A1 |
20190176885 | Sung | Jun 2019 | A1 |
20190193776 | Tsubaki | Jun 2019 | A1 |
20190193782 | Tsubaki | Jun 2019 | A1 |
20190225260 | Tsubaki | Jul 2019 | A1 |
20190225261 | Kodera | Jul 2019 | A1 |
20190233003 | Kodera | Aug 2019 | A1 |
20190233004 | Kodera | Aug 2019 | A1 |
20190256133 | Tsubaki | Aug 2019 | A1 |
20190263446 | Tsubaki | Aug 2019 | A1 |
20190300044 | Tsubaki | Oct 2019 | A1 |
20190315403 | Irie | Oct 2019 | A1 |
20190322309 | Takase | Oct 2019 | A1 |
20190337556 | Tsubaki | Nov 2019 | A1 |
20190344824 | Takase | Nov 2019 | A1 |
20190359023 | Isshiki | Nov 2019 | A1 |
20190359203 | Isshiki | Nov 2019 | A1 |
20190359219 | Isshiki | Nov 2019 | A1 |
20190359247 | Tsubaki | Nov 2019 | A1 |
20190359248 | Tsubaki | Nov 2019 | A1 |
20190359250 | Isshiki | Nov 2019 | A1 |
20190362570 | Kikuta | Nov 2019 | A1 |
20200010111 | Tsubaki | Jan 2020 | A1 |
20200033146 | Cash | Jan 2020 | A1 |
20200062296 | Kim | Feb 2020 | A1 |
20200070878 | Du | Mar 2020 | A1 |
20200094870 | Shoji | Mar 2020 | A1 |
20200108857 | Tsubaki | Apr 2020 | A1 |
20200156698 | Tsubaki | May 2020 | A1 |
20200172156 | Tamaizumi | Jun 2020 | A1 |
20200223477 | Tamaizumi | Jul 2020 | A1 |
20200231204 | Isshiki | Jul 2020 | A1 |
20200283063 | Kashi | Sep 2020 | A1 |
20200290668 | Moreillon | Sep 2020 | A1 |
20200317261 | Shoji | Oct 2020 | A1 |
20200324808 | Kodera | Oct 2020 | A1 |
20200331517 | Toko | Oct 2020 | A1 |
20200361525 | Kodera | Nov 2020 | A1 |
20200361526 | Stoltze | Nov 2020 | A1 |
20200369316 | Tsubaki | Nov 2020 | A1 |
20200391789 | Kim | Dec 2020 | A1 |
20200398893 | Shoji | Dec 2020 | A1 |
20200406964 | Hultén | Dec 2020 | A1 |
20210061344 | Kitazume | Mar 2021 | A1 |
20210100530 | Park | Apr 2021 | A1 |
20210114653 | Tsubaki | Apr 2021 | A1 |
20210206426 | Kitazume | Jul 2021 | A1 |
20210253158 | Hultén | Aug 2021 | A1 |
20210253161 | Yoshida | Aug 2021 | A1 |
20210253164 | Irie | Aug 2021 | A1 |
20210255640 | Imamura | Aug 2021 | A1 |
20210387669 | Sakaguchi | Dec 2021 | A1 |
20220009547 | Osajima | Jan 2022 | A1 |
20220041210 | Sakaguchi | Feb 2022 | A1 |
20220063710 | Tsubaki | Mar 2022 | A1 |
20220089214 | Kodera | Mar 2022 | A1 |
20220089218 | Kodera | Mar 2022 | A1 |
20220135117 | Tsubaki | May 2022 | A1 |
20220144334 | Kakas | May 2022 | A1 |
20220144336 | Kim | May 2022 | A1 |
20220250678 | Keßler | Aug 2022 | A1 |
20220289288 | Hultén | Sep 2022 | A1 |
20220315103 | Mori | Oct 2022 | A1 |
20220355856 | Tanaka | Nov 2022 | A1 |
20230166791 | Kim | Jun 2023 | A1 |
20230278630 | Ono | Sep 2023 | A1 |
Number | Date | Country |
---|---|---|
105667592 | Apr 2018 | CN |
108698637 | Oct 2018 | CN |
109803874 | May 2019 | CN |
109963772 | Jul 2019 | CN |
110291001 | Sep 2019 | CN |
102021201141 | Dec 1899 | DE |
19601825 | Jul 1997 | DE |
102004048495 | Nov 2005 | DE |
102007008342 | Aug 2008 | DE |
102014208785 | Nov 2015 | DE |
102018104473 | Oct 2018 | DE |
102019210509 | Jan 2021 | DE |
0718174 | Jun 1996 | EP |
1234746 | Aug 2002 | EP |
1291262 | Mar 2003 | EP |
1584544 | Oct 2005 | EP |
3444167 | Feb 2019 | EP |
3556639 | Oct 2019 | EP |
11147483 | Jun 1999 | JP |
2000198453 | Jul 2000 | JP |
2002029433 | Jan 2002 | JP |
2003285754 | Oct 2003 | JP |
2003285762 | Oct 2003 | JP |
2003291834 | Oct 2003 | JP |
2010188854 | Sep 2010 | JP |
2015020604 | Feb 2015 | JP |
2015033942 | Feb 2015 | JP |
2015093569 | May 2015 | JP |
6213033 | Oct 2017 | JP |
6273706 | Feb 2018 | JP |
2018024281 | Feb 2018 | JP |
2019131014 | Aug 2019 | JP |
2019137370 | Aug 2019 | JP |
2020069990 | May 2020 | JP |
2021133776 | Sep 2021 | JP |
WO-2017138617 | Aug 2017 | WO |
WO-2018070511 | Apr 2018 | WO |
WO-2018084190 | May 2018 | WO |
2018168897 | Sep 2018 | WO |
WO-2018168897 | Sep 2018 | WO |
Entry |
---|
“Comparison of Feedback Control Techniques for Torque-Vectoring Control of Fully Electric Vehicles,” De Novellis et al., IEEE Transactions on Vehicular Technology (vol. 63, Issue: 8, pp. 3612-3623); 2014-10-31. (Year: 2014). |
“Power-steering control architecture for automatic driving;” Naranjo et al.; IEEE Transactions on Intelligent Transportation Systems ( vol. 6, Issue: 4, pp. 406-415); Dec. 1, 2005. (Year: 2005). |
“Design of Automatic Steering Controller for Trajectory Tracking of Unmanned Vehicles Using Genetic Algorithms;” Guo et al., IEEE Transactions on Vehicular Technology (vol. 61, Issue: 7, pp. 2913-2924); Oct. 1, 2012. (Year: 2012). |
“Robust two degree-of-freedom vehicle steering controller design;” Guvenc et al.; IEEE Transactions on Control Systems Technology (vol. 12, Issue: 4, pp. 627-636); Jul. 1, 2004. (Year: 2004). |
German Search Report dated Oct. 4, 2021 for the counterpart German Patent Application No. 10 2021 202 482.3. |
Search Report and Written Opinion dated Aug. 9, 2022 from corresponding European patent application No. 22180012.3. |
Search Report dated Jan. 23, 2023 from corresponding Japanese patent application No. 2022-018498. |
Japanese Notice of Reasons for Refusal dated Jan. 31, 2023 from corresponding Japanese patent application No. 2022-018498. |
Decision to Grant dated Apr. 28, 2023 for from corresponding Japanese patent application No. 2022-018498. |
Intention to Grant European Patent dated Jun. 15, 2023 from corresponding European patent application No. 22180012.3. |
Number | Date | Country | |
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20220289286 A1 | Sep 2022 | US |