Development Of Certain Type Of An Integrated Detection Systems For Aircraft Engine Electronic Controller

Aerial engine electronic controller integrated detection system is mainly used for the ground test of electronic controller,and it is a necessary process to realize the full-life management of Aero engine electronic controller.It is mainly divided into analog electronic controller detection system,digital electronic controller detection system,and full license electronic controller detection system.The simulated electronic controller detection system is mainly used to test the performance of a certain type of Aero engine electronic controller.This paper completes a test system for all the test items of this type of electronic controller,and it has practical application significance to the research of digital and full-license electronic controller detection system which is gradually started to be equipped in China.The development of the entire system involves hardware circuit design,single-chip computer programming,and upper software design.I mainly carried out all the hardware circuit design,part of the single-chip program development and the overall performance of the verification test.The hardware system determines the overall architecture according to the test function.According to the number of internal and external interfaces and the principle of combining the basic circuit design knowledge such as simulation and digital signal separation,the hardware circuit framework of nine functional circuit boards plus one interface circuit board is established.On the basis of this,the design of signal conditioning circuit of each functional plate is refined according to the function and precision requirements of electronic controller testing.The main designs include power supply system,switch quantity control circuit,sensor signal conditioning circuit,speed and temperature generation circuit,voltage measurement circuit,high-speed electromagnetic valve signal processing circuit and fault self-inspection circuit.In the design process,the main measures for electromagnetic compatibility problems are to adopt signal and power supply and ground layer layout wiring,formation and source layer copper coating and other measures to suppress electromagnetic interference,and circuit board layout and wiring strictly follow relevant specifications.The signal integrity and the repeatability and stability of the parameters meet the requirements in the process of the whole machine.In order to better simulate the performance parameters of the electronic controller working in the air on the ground,the signal conditioning circuit of the main sensor is designed to simulate the signals such as the angle,speed,vibration,temperature,and pressure of the Aero engine,and according to the corresponding calculation formula.Calculate whether the performance of the electronic controller meets the technical requirements.The circuit design and principle simulation are mainly used to design signal conditioning circuit and circuit simulation in the process to improve the design quality and speed.This project mainly uses Cadence for circuit diagram and PCB diagram design,and uses Multisim for simulation.Embedded control is used to control the process of the electronic controller,including switch quantity control based on the I2 C bus,programmable digital potentiometer control,and data acquisition card control.Finally,this paper gives the relevant verification methods and results,and discusses the problems encountered and the methods adopted in some debugging in detail.At present,the system has been used stably in this type of electronic controller test.