Title :
Electromechanical actuation for thrust vector control applications
Author :
Roth, Mary Ellen
Author_Institution :
NASA Lewis Res. Center, Cleveland, OH, USA
Abstract :
The advanced launch system (ALS), is a launch vehicle that is designed to be cost-effective, highly reliable, and operationally efficient with a goal of reducing the cost per pound to orbit. An electromechanical actuation (EMA) system is being developed as an attractive alternative to the hydraulic systems. The controller will integrate 20 kHz resonant link power management and distribution (PMAD) technology and pulse population modulation (PPM) techniques to implement field-oriented vector control (FOVC) of a new advanced induction motor. The driver and the FOVC will be microprocessor controlled. For increased system reliability a built-in test (BITE) capability will be included. This involves introducing testability into the design of a system such that testing is calibrated and exercised during the design, manufacturing, maintenance, and prelaunch activities. An actuator will be integrated with the motor controller for performance testing of the EMA thrust vector control (TVC) system. The EMA system and work proposed for the future are discussed
Keywords :
aerospace control; electric actuators; induction motors; 20 kHz; advanced launch system; built-in test; electromechanical actuation; field-oriented vector control; induction motor; launch vehicle; motor controller; performance testing; pulse population modulation; reliability; resonant link power management and distribution; testability; thrust vector control; thrust vector control applications; Costs; Energy management; Hydraulic systems; Machine vector control; Power system reliability; Pulse modulation; Resonance; System testing; Technology management; Vehicles;
Conference_Titel :
Aerospace and Electronics Conference, 1990. NAECON 1990., Proceedings of the IEEE 1990 National
Conference_Location :
Dayton, OH
DOI :
10.1109/NAECON.1990.112970
