Research On Modeling And Torque Loading Control Technology Of Turbo-shaft Engine

Hardware- in-loop simulation test of aero-engine, which has the advantages of higher efficiency,less risk and lower cost, is one of the most important methods in developing engine control system. In view of the current urgent demand of torque loading control technology of turbo-shaft engine control system simulation test and test-bed experiment, the modeling, digital simulation and torque loading control technology of turbo-shaft engine are studied, and then verified on the “rotor system status monitoring and health management comprehensive testing platform”.Firstly, component-based mathematical model of turbo-shaft engine is established based on deep analysis of the aerodynamic characteristic of aero-engine components. After analyzing the control requirements, the steady-state control law, the transition state control law and the torque balance control strategy of twin-engine are established. Digital simulation results verified the control performance.Secondly, according to the electrical configuration of the “rotor system status monitoring and health management comprehensive testing platform”, as well as the analysis of the working principle of the hardware, such as frequency converter and eddy current dynamometer, a new embedded controller based on ARM is developed, which selects TM4 C controller as CPU and power MOSFET as power driver device. PI control algorithm and the RTX real-time operating system are adopted in the implementation of closed-loop control of torque-loading controller for eddy current dynamometer. For the problem of electromagnetic interference existed in the process of test, the corresponding suppression methods are put forward by analyzing its mechanism.Next, by analyzing the working mechanism of OPC technology, the OPC Client program with custom interface for data accessing is designed based on Visual C++, which realizes the information interaction between the aero-engine mathematical model and experimental equipment. The experiment results show that the OPC client program can meet the real-time performance of test system.At last, through analyzing the requirements of the tests including the load simulation test of turbo-shaft engine and the torque balance simulation test of twin-engine, a specific description of the simulation system is given, including the principle of the simulation and the construction of the simulation platform.