A Feasibility Study of an Alternative Power and Control System for a High Precision Gyro.
Abstract
A new gyro wheel drive system composed of an induction motor on the same shaft as, and in electrical series with, a permanent magnet motor has been designed, analyzed, implemented, and tested. Its open loop operating characteristics have been determined for both a voltage source and current source power stage. The system is too unreliable in the open loop mode for high precision gyro applications. A closed loop control scheme that relies upon the sensed back EMF of the PM motor has been developed to commutate the two motor system. Its steady state and transient response characteristics have been documented. It has been shown that the entire system employing the two motors and closed loop control algorithm can start the gyro, accelerate it up to synchronous speed, and maintain synchronous lock much more effectively and efficiently than previously used hysteresis synchronous motor systems. Also, it has been demonstrated that the same system can power the gyro through a rotary transformer interface with little degradation in system performance.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1978
- Accession Number
- ADA063591
Entities
People
- Marc Normand Richard