Antiskid brake control system

摘要

An antiskid brake control system for a wheeled vehicle having a second order lead network in parallel connection with a deceleration detector. The deceleration detector includes both a current threshold level and a voltage threshold level, the deceleration rate of a wheel having to exceed both thresholds to result in a brake control signal to the modulator and brake control valves. The lead network, deceleration detector, and a modulator all feed a summing circuit which includes a switching circuit providing the system with two distinct characteristic gains. Also included is a circuit for linearly discharging certain capacitors in the system. Also included are locked wheel, touchdown protection, and low speed drop-out circuitry to regulate the application and release of antiskid control and touchdown and upon the occurrence of preselected vehicle activities.