Claims
- 1. A sight element stabilization system for a military ground vehicle designed to traverse rough terrain comprising a vehicle-mounted sight element mounted for pivotal movement about a generally horizontal axis and subject to reciprocatory dislocation about said axis by the terrain disturbances; a reversible torque motor drivingly connected to the sight element to minimize the reciprocatory dislocations; and control means for the motor; said control means comprising a first gyroscope mechanically connected to said sight element for generating a first time-variant signal related to the terrain-generated dislocation of the sight element, a second gyroscope positioned within the vehicle to respond to the same terrain disturbances that produce reciprocatory dislocations of the sight element, said second gyroscope being constructed to generate a second time-variant signal related to the terrain-generated dislocation of the vehicle, a zero crossover detector converting the second signal into a square wave signal, and signal summation means combining the first signal and square wave signal into a motor control signal for driving said torque motor.
- 2. In the system of claim 1: said zero crossover detector being effective to cause the square wave signal and first signal to be on opposite sides of the signal mean level when the first signal approaches the mean level.
- 3. In the system of claim 1: said first and second signals being substantially in phase, whereby the square wave signal and first signal are additive.
Government Interests
The invention described herein may be manufactured, used, and licensed by or for the Government for governmental purposes without payment to us of any royalty thereon.
US Referenced Citations (4)
Foreign Referenced Citations (2)
Number |
Date |
Country |
1,473,898 |
Aug 1969 |
DT |
1,925,326 |
Nov 1970 |
DT |