Feedback PDM encoder and method for actuating a pneumatic actuat

Details Feedback PDM encoder and method for actuating a pneumatic actuat Feedback PDM encoder and method for actuating a pneumatic actuat

1975-12-08

1977-07-05

Pendegrass, Verlin R.

Aeronautics and astronautics

Missile stabilization or trajectory control

Automatic guidance

244 321, 318580, 318603, 91 47, 2351502, F42B 1330

Patent

active

040335259

ABSTRACT:
A feedback PDM encoder and method is presented which permits utilization of neumatic pulse duration modulation (PDM) actuators with potentiometer position pickoffs in a digital autopilot loop. The actuator is directly driven by a signal derived in the digital autopilot which is in the pulse duration modulation (PDM) format. This signal is derived within the autopilot digital computer using conventional digital techniques. Analog feedback from the potentiometer which indicates angular excursion of the actuator is formatted into a PDM format. This method yields all signals necessary to operate the actuator in a closed loop missile control system.

REFERENCES:
patent: 3415466 (1968-12-01), Poole, Jr.
patent: 3430536 (1969-04-01), Oelrich
patent: 3437894 (1969-04-01), Pohl
patent: 3521535 (1970-07-01), Oelrich
patent: 3826964 (1974-07-01), Byrne
patent: 3940673 (1976-02-01), Darlington

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