Design of high power electromechanical actuator for thrust vector controlNASA-Marshall has undertaken the development of electromechanical actuators (EMAs) for thrust vector control (TVC) augmentation system implementation. The TVC EMA presented has as its major components two three-phase brushless dc motors, a two-pass gear-reduction system, and a roller screw for rotary-to-linear motion conversion. System control is furnished by a solid-state electronic controller and power supply; a pair of resolvers deliver position feedback to the controller, such that precise positioning is achieved. Peformance comparisons have been conducted between the EMA and comparable-performance hydraulic systems applicable to TVCs.
Document ID
19910059408
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Cowan, J. R. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Myers, W. N. (NASA Marshall Space Flight Center Huntsville, AL, United States)