Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration
Patent
1998-02-12
2000-09-26
Cuchlinski, Jr., William A.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Indication or control of braking, acceleration, or deceleration
701 73, 701 82, 701 91, 303148, 303150, 303163, B60B 3900, B60T 712
Patent
active
061253189
ABSTRACT:
An antiskid brake controller utilizes measured wheel speed in order to provide brake control for a vehicle such as an aircraft. The controller estimates the speed of the vehicle via approximation based on the measured wheel speed and a model of the mu-slip ratio curve representing the wheel to running surface friction characteristics. The controller then predicts the slip ratio based on the measured wheel speed and estimated vehicle speed. The difference between the predicted slip ratio and a predefined desired slip ratio is used to drive a modified integral controller segment to achieve maximum obtainable friction. In another embodiment, the controller measures and integrates the applied braking torque in order to estimate the vehicle speed. The estimated vehicle speed is again combined with the measured wheel speed to determine an estimated slip ratio. The controller compares the estimated slip ratio with a predefined desired slip ratio which again drives a modified integral controller.
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Arthur Gertrude
Cuchlinski Jr. William A.
Ronyak David M.
Saralion Mark D.
The B. F. Goodrich Company
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