某型航空发动机自动测试系统研制

为解决某型航空发动机测试系统检测结果主观因素大、检测速度慢,损耗发动机使用寿命等问题,研制了该型航空发动机的自动测试系统.首先介绍了系统总体方案要求,分析了该自动测试系统的硬件总体结构并设计了高、低压转速信号,T1、T3、T6温度小信号等调理电路;其次归纳分析了动、静态检测流程,为模拟人工搜索过程确定了检测点位置,结合单因素试验0.618法提出了一种时序递增自寻优搜索算法,并阐述了该算法的基本原理;最后在发动机上进行了试验验证.试验结果表明:该自动测试系统硬件电路设计合理,信号采集准确,误差满足要求;软件流程设计合理,搜索算法快速准确,检测速度提高了约一倍,节省发动机的使用寿命.

Design of Automatic Test System on An Aeroengine

To solve the problems that subjective factor is major in test result of test system of aeroengine and the life of aeroengine is wasted because of the slow test seed, an automatic test system is designed. Firstly, the whole project is introduced, the hardware structure of automatic test system is analyzed and the measure circuits such as the high and low pressure rotating speed signals, weak signals T1, T3, T6, etc. are designed. Next, the software flow is analyzed. For the purpose of realizing the determination of test points in the search process, a seek-self searching algorithm in time order is put forward in combination with single factor test method 0.618, the structure and flow of the algorithm are analyzed and the fundamental of the algorithm is illuminated. Finally, the test system is tested using an aeroengine. The test result shows that the design of the hardware structure of the test system is reasonable and logical, the signal collected is accurate, the error is content with the requirement, the design of the software flow is logical, the searching algorithm is fast, accurate and the measure speed is doubled which will save the service life of aeroengine.