Research on Distributed Intelligent Node

The aero-engine distributed control system can overcome the problems of high complexity, long development cycle, poor maintainability, difficult iterative verification, low computing power, and excessive weight and volume of the centralized control system. It will become an important trend in the future engine control methods. The sensor intelligent node is a key node of the distributed control system, which can effectively improve the quality of signal processing, reduce the computing burden of the FADEC system, improve the maturity and maintainability of the system, and shorten the development cycle of the FADEC system. This paper proposes a general architecture of sensor intelligent nodes, based on switch matrix and SoC processor, which can adapt to different types and quantities of engine monitoring sensors. This architecture can complete the parallel high-speed acquisition and processing of multi-channel sensor signals. It can be connected to the distributed control system as a distributed bus node, and it can realize the fault diagnosis of signal conditioning and acquisition based on the surround BIT, and support the intelligent algorithm of sensor fault diagnosis. Based on multiple linear regression, neural network intelligent algorithm and embedded temperature sensor, the sensor intelligent node can perform temperature compensation and calibration for sensor signal acquisition. It can improve signal acquisition accuracy and anti-interference ability greatly, and provide a strong guarantee for the performance improvement of the control system.