Patent Application
20100148463
1. Field of the Invention
The invention relates to a suspension system and a method for shock absorbing thereof, more particularly to a mechatronic suspension system and a method for shock absorbing thereof.
2. Description of the Prior Art
When the vehicle is driven on the road, it suffers from various shock and impact from ground and driving conditions, wherein part of shock and impact can be absorbed by the tires, and most of shock and impact must be absorbed by the suspension system installed between the tires and car body. It can prevent the parts of car body from damage, and make the passengers feel comfortable. Thus the suspension system not only can absorb the outside shock and impact, but also can have direct and positive influence on the stability and manipulation of driven vehicle.
As for the major design and application of the vehicle suspension system at present, the mechanical devices such as the spring device, air cushion device, and hydraulic device are all adopted. However, the performance of the above-mentioned suspension systems is not satisfied for the industrial requirement. Thus the above-mentioned traditional vehicle suspension system still has the shortcomings.
Inerter mechanism is a mechanical network component, wherein the mechanical system can be correspondent to the electronic system completely, and is widely used in the system design for vehicle, motorcycle, train and building etc., in order to raise their performance. As for the example of above-mentioned suspension systems, if the inerter is used in the suspension design, the fixed structure or non-fixed structure can be adopted. The fixed structure can carry out the optimal design of structural parameters corresponding to the requirement of specific performance. The non-fixed structure uses the Linear Matrix Inequalities (LMI) to optimize the transfer function or the system impedance, and then cooperates with the network synthesis to find out the corresponding structures. It was illustrated that system performance can be further improved by allowing higher order and complex system impedance. However, the network synthesis for high-order impedance can be very complicated and the volume of mechanical devices is too large to install in the vehicle chassis actually.
Therefore, in order to provide better and more effective vehicle suspension apparatus, it is necessary to research and develop a novel suspension device, to raise the efficiency and reduce the manufacturing time and manufacturing cost.
The purpose of the invention is to provide a mechatronic suspension system and a method for shock absorbing thereof, in order to improve the technique of existing suspension systems, and raise the shock absorbing effects.
The mechatronic suspension system apparatus of the invention is connected to two terminals, and consists of an inerter mechanism, a permanent magnet electric machinery and a feedback circuit. The inerter mechanism is connected to the terminals to transfer the linear motion into the rotational motion. The permanent magnet electric machinery is connected to the inerter mechanism to generate a corresponding voltage. And the feedback circuit is connected to the permanent magnet electric machinery to provide suitable system impedance and to generate a feedback force.
According to another scope of the invention, the method for shock absorbing proposed by the invention comprises: Using the inerter mechanism to transfer the linear motion into rotational motion, using the permanent magnet electric machinery to generate a corresponding voltage, and using the feedback circuit to provide suitable system impedance and to generate a feedback force.
The invention applies the corresponding relation of mechanical/electronic networks to propose a mechatronic suspension system. It combines a ball-screw inerter and a permanent magnet electric machinery, such that the complicated network structure can be realized through the combination of mechanical and electronic networks.
In practical application, the invention can be used in vehicle and motorcycle industry, train industry, building industry, shock absorbing systems, precision machinery, and optical shock absorbing desks etc. Its technical feature is to combine the mechanical impedance and electronic impedance to form a mechatronic system. The electronic impedance is converted to equivalent mechanical impedance through the ball-screw and direct current motor, such that the complicated network structure can be realized in reality.
The invention can be achieved through the ball-screw, or the conversion of linear-rotational physical quantity can be completed through the rack-and-pinion or the hydraulic way.
The invention can be carried out by the direct current motor. The invention can also use active electrical networks to reach the design of active mechatronic suspension systems.
The traditional inertial performance increment is only limited to the vehicle systems of high-stiffness, such as sport cars and F1 racing cars. The invention can be expanded to other vehicle systems.
The mechatronic suspension system proposed by the invention can improve the performance of vehicle systems of low-stiffness, such as sedans, such that its scope of application is more extensive.
Therefore, the advantage and spirit of the invention can be understood further by the following detail description of invention and attached Figures.
The foregoing aspects and many of the attendant advantages of this invention will become more readily appreciated as the same becomes better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein:
As shown in
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In Step 310, the inerter mechanism is used to transfer the linear movement into the rotational movement. In the mechatronic suspension system 100, when the relative motion is generated between the first terminal 101 and the second terminal 102, the mechatronic suspension system 100 can use the inerter mechanism 111 to transfer the linear movement into the rotational movement. Namely when the relative linear motion is generated between the first terminal 101 and the second terminal 102, the ball-screw 204 of inerter mechanism 111 will rotate the axle of permanent magnet electric machinery 112 through the couple 205.
In Step 311, the relative voltage is generated pursuant to the angular velocity of the permanent magnet electric machinery. Namely the permanent magnet electric machinery 111 will generate a voltage according to the angular velocity provided by the inerter mechanism 112, wherein the voltage is corresponding to the angular velocity. When the angular velocity is larger, the higher is the voltage. And when the angular velocity is smaller, the lower is the voltage. Namely the angular velocity has the proportional relationship with respect to the voltage.
In Step 312, the system impedance is designed to provide the feedback force. Namely the feedback circuit 113 in the mechatronic suspension system 100 can provide the designed system impedance in accordance with the voltage, and adjust the electric current and inductive torque, and generate suitable mechanical force or the equivalent mechanical force to reach the performance requirement of system shock reduction and shock absorbing.
Therefore summarized from the above-mentioned description, the mechatronic suspension system has a ball-screw inerter at one end. When the relative displacement is generated between the nut and the bearing socket, the axle of permanent magnet electric machinery coupled to ball-screw inerter will be rotated to generate a corresponding voltage. In order to provide suitable system impedance and to generate a feedback force through the design of electronic network, the equivalent mechanical force will be generated through the design of outside electronic network impedances to reach the performance requirement of system shock reduction.
The invention uses the inertial principle to make up the mechanical network component. The mechanical system can be correspondent to the electronic system completely, and is widely used in the system design of vehicle, motorcycle, train and building etc., in order to raise their performance. The invention can be realized through the ball-screw, or the conversion of linear-rotational physical quantity can be realized through the rack-and-pinion or the hydraulic way.
Thus, summarized from the above-mentioned description, a preferred embodiment of the invention applies the corresponding relationship of mechanical/electronic networks to propose a mechatronic suspension system. The ball-screw inerter and the permanent magnet electric machinery are combined to realize the complicated network structure through the combination of mechanical and electronic networks.
It is understood that various other modifications will be apparent to and can be readily made by those skilled in the art without departing from the scope and spirit of this invention. Accordingly, it is not intended that the scope of the claims appended hereto be limited to the description as set forth herein, but rather that the claims be construed as encompassing all the features of patentable novelty that reside in the present invention, including all features that would be treated as equivalents thereof by those skilled in the art to which this invention pertains.
| Number | Date | Country | Kind |
|---|---|---|---|
| 097148362 | Dec 2008 | TW | national |
