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为解决因测量精度低、实时性差引起的液体火箭发动机工况分析困难的问题,结合某型号运载火箭发动机涡轮泵转速信号特点和遥测信号传送要求,提出了基于的CPLD周期法测量液体火箭发动机涡轮泵转速的方法,对转速信号周期的提取、传输以及在遥测系统内的波道编码进行了设计,采用Quartus II软件对转速周期的测量过程进行了仿真验证,设计的原理样机参加了该型号火箭遥测系统试验,试验结果表明,数字式发动机转速测量方法较型号现有的“分频法”在测量的精度和实时性方面均有大幅提升,能有解决目前发动机在加速启动段和减速关机段等转速急剧变化时段转速不能及时、准确测量的问题。
In order to solve the problem of liquid propellant rocket engine operating conditions caused by poor measurement accuracy and poor real-time performance, combined with the characteristics of the rotational speed signal of a certain type of propellant rocket engine turbo pump and telemetry signal transmission requirements, a CPLD periodic method based on the measurement of liquid rocket engine turbine Pump speed, the cycle of the speed signal extraction, transmission and channel coding in the telemetry system were designed using Quartus II software to test the cycle of the speed measurement process simulation, the design of the prototype to participate in the model rocket Telemetry system test, the test results show that the digital engine speed measurement method than the existing model “crossover method ” in the measurement accuracy and real-time are greatly improved, can solve the current engine acceleration start section and deceleration Shutdown and other rapid changes in speed when the speed can not be timely and accurate measurement of the problem.