航天推进技术研究院主办
WEI Jingfang,LIU Jun,SUN Haizhi,et al.Design and application of stepper motor measurement and controlling instrument for LOX/kerosene rocket engine[J].Journal of Rocket Propulsion,2020,46(03):68-74.
液氧煤油发动机步进电机测控仪设计与应用
- Title:
- Design and application of stepper motor measurement and controlling instrument for LOX/kerosene rocket engine
- 文章编号:
- 1672-9374(2020)03-0068-07
- Keywords:
- LOX/kerosene; stepper motor; measurement and controlling instrument; two-way motor shift control; synchronous measurement; interrupt nesting
- 分类号:
- V433
- 文献标志码:
- A
- 摘要:
- 针对液氧煤油发动机在地面热试车过程中对工况变化和极限工况条件下工作性能的考核需求,提出采用集成一体化隔离技术的电机测控仪对流量调节器和燃料节流阀步进电机实施控制,并完成从电机检测、调节组件试验、发动机装配、热试车到交付出厂的测量和控制工作。研究过程采用定时器变频中断电机变速控制、PWM斩波细分驱动、多级中断嵌套和远距离测量等关键技术,解决了步进电机长距离、大驱动力矩下快速启停平稳控制要求,以及试车双路电机同时基下独立调节和角度同步测量,实现液氧煤油发动机试车过程推力和混合比稳定调节。400余次热试车及各项试验验证,电机控制频率偏差小于±2 Hz,角度控制精度小于±0.25
- 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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备注/Memo
收稿日期:2019-07-02; 修回日期:2019-11-09
作者简介:魏京芳(1973—),女,硕士,高级工程师,研究领域为液体火箭发动机测控技术