在固体火箭发动机试验过程中,如果能够准确测量流量的实时变化,就能区分是药柱烧蚀还是喷管烧蚀引起的推力变化,对发动机喷管设计具有重要的参考价值。通过对固体火箭发动机流量测量方式和校准方法的分析,设计了移动可调力源装置来模拟发动机工作过程中的重量变化,用于校准测量发动机重量变化的称重传感器。试验结果表明,移动可调力源装置的静态加载精度优于0.05%,动态精度优于1%,达到了发动机流量校准装置的设计要求。

In the process of solid rocket motor test, if it could accurately measure real-time change of flow, the cause of thrust change would be distinguished between grain erosion and nozzle erosion, and it had important reference value for the design of motor nozzle. By the analysis of flow measurement way and calibration method, we designed the removable adjustable power source device to simulate the weight change in engine working process, which was used for the weighing sensor to adjust and measure engine weight change. The test results showed that the static loading accuracy of the movable adjustable power source device was better than 0.05%, and the dynamic accuracy was better than 1%, which met the requirement of the engine flow calibration device.