Fluid-pressure and analogous brake systems – Speed-controlled – Torque sensing
Reexamination Certificate
2005-07-12
2005-07-12
Graham, Matthew C. (Department: 3683)
Fluid-pressure and analogous brake systems
Speed-controlled
Torque sensing
C303S178000
Reexamination Certificate
active
06916075
ABSTRACT:
The adaptive brake application and initial skid detection system allows rapid brake application and prevents deep initial skids. Brake torque is compared with a predetermined threshold brake torque. Wheel velocity error signals are also generated to indicated the difference between the wheel velocity and a reference velocity signal. A torque bias modulator integrator responsive to brake torque signals adjusts the wheel velocity error signals to provide an anti-skid control signal. The torque bias modulator integrator can also be initialized to the value of the measured brake torque when the wheel velocity error signals indicate the beginning of a skid. Brake torque difference signals are generated to indicate the difference between brake torque and a commanded brake torque, and an adjusted brake torque error signal is generated in response to the brake torque difference signals.
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US RE30,763, 10/1981, Hirzel et al. (withdrawn)
Motohiro Igarashi, et al., Digital Brake Control System for Mag-lev Trains, presented at STech '93 (International Conference on Speedup Technology for Railway and MAGLEV Vehicles), Nov. 1993, Yokohama, Japan.
Cook Robert D.
Salamat Bijan
Fulwider Patton Lee & Utecht LLP
Graham Matthew C.
Hydro-Aire, Inc.
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