Accession Number : ADD004867

Title :   Feedback PDM Encoder and Method for Actuating a Pneumatic Actuator with a Digital Autopilot.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C

Personal Author(s) : Leonard,John P ; Yates,Robert E

Report Date : 05 Jul 1977

Pagination or Media Count : 7

Abstract : A feedback PDM encoder and method is presented which permits utilization of pneumatic 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. (Author)

Descriptors :   *Patents, *Analog to digital converters, *Automatic pilots, Pulse duration modulation, Pneumatic actuators, Feedback

Subject Categories : Flight Control and Instrumentation
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE