The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 2022
Filed:
Feb. 21, 2019
Xi' an Aerospace Propulsion Institute, Shaanxi, CN;
Bin Li, Xi'an, CN;
Hui Chen, Xi'an, CN;
Xiaoguang Zhang, Xi'an, CN;
Yalong Yang, Xi'an, CN;
Jingfang Wei, Xi'an, CN;
Yushan Gao, Xi'an, CN;
Guochuang Dong, Xi'an, CN;
Dongying Ma, Xi'an, CN;
Weiyu Chen, Xi'an, CN;
Xingxing Pu, Xi'an, CN;
XI' AN AEROSPACE PROPULSION INSTITUTE, Shaanxi, CN;
Abstract
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.