초록 ▼

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 runni

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.

대표청구항 ▼

[ What is claimed is:] [1.] An antiskid brake controller for controlling a braking operation of a wheel of a vehicle based on a wheel speed signal provided by a wheel speed sensor coupled to the wheel, the controller comprising:slip ratio estimator means for estimating a speed of the vehicle and a s

[ What is claimed is:] [1.] An antiskid brake controller for controlling a braking operation of a wheel of a vehicle based on a wheel speed signal provided by a wheel speed sensor coupled to the wheel, the controller comprising:slip ratio estimator means for estimating a speed of the vehicle and a slip ratio between the wheel speed and the speed of the vehicle based substantially exclusively on the wheel speed signal provided by the wheel speed sensor and a predefined model of a mu-slip ratio curve;means for comparing the estimated slip ratio with a predefined desired slip ratio to generate an error signal; andintegral controller means for integrating the error signal to provide a control signal for adjusting a brake force applied to the wheel.