EEC检测系统α_2及Φ_(sp)测试研究

Study on α_2 and Φ_(sp) Testing of the EEC Detecting System

根据自整角机的构造、工作原理和输入输出信号特性,提出了一种新型的硬件测角方法,并应用于EEC检测系统发动机试车模块。根据相关函数测角原理,设计了数字转换电路及其信号调制适配电路。适配电路中的多级并联放大电路、带通滤波器对试车过程中的随机干扰信号,尤其是振动引起的噪声具有很强的抑制作用。结果表明,该方法可以高精度地跟踪自整角机的角度变化,这对于研究某型涡扇发动机α通道的控制规律及其检查排故具有重要的工程意义。

According to the structure, principle and IO characteristics of the automatic adjust-angle transformer, this paper proposes a new hardware measuring method and has been applied in the test run part of the EEC Detect System. Based on the correlative function theory, A\D transform circuits and signals modulation circuits are designed. The multi-parallel- magnification circuits and the band-pass filter can well restrain random interfering noise, especially generated by test run vibration. Results demonstrate that the method can trace the angle change of the automatic adjust-angle transformer with high precision. It is of much importance in studying the control regulation of α passage, EEC detecting and its failure recovery.