载荷识别技术在火箭推力偏心测试中的应用

目的 研究将载荷识别技术应用于火箭发动机推力偏心测试，用载荷识别方法提高推力偏心测试精度。方法 推导火箭发动机推力载荷识别的基本关系式，对推力偏心测试装置进行动态特性测试，获取其动态传递函数矩阵，用推力偏心测试得到的响应数据反求火箭发动机推力载荷。结果 获得了某火箭发动机的推力偏心角数据。结论 载荷识别技术应用于火箭发动机推力偏心测试，方法简便，数据处理可靠。

Measuring Rocket Thrust Misalignment by Using Load Identification Technique

Aim To measure the rocket thrust misalignment and improve the accuracy of the measurement system by using load identification technique. Methods The test system transfer function matrix was established on the basis of the load identification theory. The dynamics of the thrust stand installation were analyzed by using load identification method. The dynamic characteristics of the thrust stand assembly were obtained. The value of thrust force was calculated through corresponding response load cell output. Results The rocket thrust misalignment was identified and quantified with due consideration of the effects of system dynamics. Conclusion The load identification technique is an efficient method of measuring rocket thrust misalignment.