|Table of Contents|

Design and application of stepper motor measurement and controlling instrument for LOX/kerosene rocket engine(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2020年03期
Page:
68-74
Research Field:
研究与设计
Publishing date:

Info

Title:
Design and application of stepper motor measurement and controlling instrument for LOX/kerosene rocket engine
Author(s):
WEI Jingfang;  LIU Jun;  SUN Haizhi;  HU Xianglong
(Xi’an Aerospace Propulsion Institute, Xi’an 710100, China)
Keywords:
LOX/kerosene;  stepper motor;  measurement and controlling instrument;  two-way motor shift control;  synchronous measurement;  interrupt nesting
PACS:
V433
DOI:
-
Abstract:
To meet the requirements to qualify the characteristics of LOX/kerosene engine under changing working conditions and extreme working conditions during ground hot tests, a motor measuring and controlling instrument with an integrated isolation technology was proposed to different types of flow regulators and fuel throttle valve. The flow valve stepper motor was controlled to complete the measurement and control work ranged from motor detection, adjustment component test, engine assembly, hot test to the delivery. In the research process, key technologies such as variable speed control of timer frequency conversion interrupt motor, PWM chopper subdivision drive, multi-level interrupt nesting and long-distance measurement were adopted. As result, the requirements of fast start-stop smooth control of stepper motor under long distance and large driving torque, and the independent test of the two-way motor at the same time and the simultaneous measurement of the angle were fulfilled, thus the thrust and mixing ratio of the LOX/kerosene engine test process were stably adjusted. More than 400 hot tests and various verified tests had been conducted, and the motor control frequency deviation is less than ±2 Hz, and the angle control accuracy is better than ±0.25

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Last Update: 2020-06-25