Servo type switching for remote automatic braking system

Claim 1

A remote automatic braking system for an aircraft vehicle with servo switching means attached to automatic brakes subject to system override if said vehicle is having thrust applied which comprises: a command system for engaging said automatic brakes by an initial signal which serves as a triggering impulse; a transition amplifier providing smooth engagement of said triggering from the command system, said transition amplifier positioned to receive said triggering impulse; an error amplifier/integrator containing a summing junction input which has an output of said transition amplifier as an input; a longitudinal accelerometer for establishing a reference signal representative of the acceleration state of said vehicle, said longitudinal accelerometer reference signal is an input to said error amplifier/integrator which is compared to said initial signal; an isolation amplifier electrically connected between said accelerometer and said error amplifier/integrator for preventing loading of said accelerometer by feedback; a level detector connected between said isolation amplifier and said error amplifier/integrator which is set to a predetermined level of acceleration due to thrust being applied and triggered by an output signal from said isolation amplifier which is greater than said predetermined level so that when said signal is greater than said predetermined level said level detector inputs a signal to said error amplifier/integrator to not engage said automatic brakes if said triggering impulse from said command system is received; an amplifier connected in parallel with said level detector between said isolation amplifier and said error amplifier/integrator for boosting said isolation amplifier output signal to a predetermined level suitable for inputting to said summing juntion in said error amplifier/integrator; and a noise filter for eliminating extraneous signals from said accelerometer prior to entry of said accelerometer amplified output signal into said summing junction of said error amplifier/integrator whose function is determined by said level detector so that for a given condition in said level detector said error amplifier/integrator amplifies or integrates.