航空发动机数字式电子控制器综合测控系统设计

A Design of Comprehensive Measurement and Control System for Digital Electronic Engine Controller

针对某型发动机数字式电子控制器在外场维修保障中面临的现实问题,在充分研究该型电子控制器信号特点并对一线维修人员实际需求进行广泛调研的基础上,设计了一型综合测控系统。通过采用全数字化设计、改进DDS技术的信号调理电路、运用虚拟仪器技术等手段,实现了高精度测控系统的小型化、模块化及自动化。测试表明,系统能够实现对原系统的上位替换,且操作简便、携行能力强、精度高,其中电压参数及时间参数的测量精度分别可达±0.01 V、±10 ms,传感器信号的模拟精度则分别能达到±0.2 Hz、±0.01 V与±0.01Ω,同时该系统也能为后期智能化检测提供硬件支撑。

Aimed at the problems that it remains to solve the practical problems in the field maintenance at a certain type of digital electronic engine controller,a comprehensive measurement and control system is designed on the basis of fully studying in the signal characteristics of the DEEC and conducting extensive investigation on the actual needs of the front-line maintenance personnel.The measurement and control system output and acquisition accuracy are ensured to realize the miniaturization,modularization and automation of the system by adopting full digital design,the modifying signal processing circuits of DDS technology,the virtual instrument technology and other means.The test shows that the system is simple and convenient in operation,excellent in loading ability,and high in precision,realizing to take the place of the original measurement and control system.In fact,the measurement precision of the voltage and time can be up to±0.01 V and±10 ms,the accuracy of the sensor signal simulation can be also up to±0.2 Hz,±0.01 V and±0.01Ω.Moreover,the system can also become a good hardware platform for studying the intelligent testing technology.