Xi' an Aerospace Propulsion Institute

Xingxing Pu

Bin Li

Hui Chen

Weiyu Chen

Xiaoguang Zhang

Yushan Gao

Jingfang Wei

Guochuang Dong

Yalong Yang

Dongying Ma

A multi-redundancy electromechanical servo system for regulating a liquid rocket engine, comprising a triple-redundancy servo controller (), a double-redundancy servo driver (), double-winding electromechanical actuators (), a triple-redundancy position sensor (), a thrust regulator () and a mixed ratio regulator (). Engine thrust, a mixed ratio regulation instruction and a feedback signal of the triple-redundancy position sensor are inputted to the triple-redundancy servo controller, and the triple-redundancy servo controller outputs thrust and mixed ratio regulation PWM wave control signals to the double-redundancy servo driver. The double-redundancy servo driver outputs a three-phase variable-frequency variable-amplitude sine wave current to drive the double-winding electromechanical actuators to drive the thrust regulator and the mixed ratio regulator to move, thus achieving engine thrust and mixed ratio regulation. The present servo system has a simple system and excellent control characteristics, has the ability to 'control a two-degree fault operation and drive a one-degree fault operation', and significantly improves the reliability and usage maintainability of the thrust and mixed ratio regulation of the liquid rocket engine. Also disclosed is a method for implementing the foregoing multi-redundancy electromechanical servo system.

Multi-redundancy electromechanical servo system for regulating liquid rocket engine and implementation method therefor

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Xi'an, China

Xingxing Pu