Claims
- 1. In an adaptive brake application and initial skid detection system for braking of a wheel of a vehicle, the vehicle having a braking system including a wheel brake for applying brake pressure to the wheel; wheel velocity signal generating means for producing a wheel velocity signal that is a function of the rotational speed of the wheel; and command brake pressure signal generating means for generating a command brake pressure signal in response to a deceleration command, the improvement comprising:wheel velocity comparison means for determining the beginning of a skid based upon the wheel velocity signal; a brake pressure sensor for sensing a maximum allowable brake pressure when the beginning of a skid is determined by the wheel velocity comparison means; and means for controlling the command brake pressure signal generating means to limit the brake pressure to the maximum allowable brake pressure, the means for controlling the command brake pressure signal generating means including a pressure bias modulator integrator, and means for initializing the pressure bias modulator integrator to the maximum allowable brake pressure when the wheel velocity signal exceeds a reference velocity signal.
- 2. The adaptive brake application and initial skid detection system of claim 1, further comprising: transient control means and compensation network means, the transient control means and compensation network means having outputs which are summed with an output of the pressure bias modulator integrator.
- 3. In a method for detecting initial skidding and applying brake pressure for braking of a wheel of an aircraft during landing of the aircraft, the aircraft having a wheel brake for applying brake pressure to said wheel, the method including the steps of wheel generating a wheel velocity signal that is a function of the rotational speed of the wheel, and generating a command brake pressure signal in response to a deceleration command, the improvement in the method comprising the steps of:determining the beginning of a skid based upon the wheel velocity signal; sensing a maximum allowable brake pressure when the beginning of a skid is determined; limiting the brake pressure to the maximum allowable brake pressure by initializing a pressure bias modulator integrator to the maximum allowable brake pressure when the wheel velocity signal exceeds a reference velocity signal.
- 4. The method of claim 3, further comprising providing transient control means and compensation network means, and summing outputs of the transient control means and compensation network means with an output of the pressure bias modulator integrator.
Parent Case Info
This is a Continuation of Ser. No. 09/591,093 filed Jun. 8, 2000, now U.S. Pat. No. 6,299,262, which is a Continuation of Ser. No. 08/850,680, filed May 2, 1997, now U.S. Pat. No. 6,132,016.
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Continuations (2)
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Number |
Date |
Country |
Parent |
09/591093 |
Jun 2000 |
US |
Child |
09/973297 |
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US |
Parent |
08/850680 |
May 1997 |
US |
Child |
09/591093 |
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US |