航空发动机转速数控系统的动态模拟研究

DYNAMIC SIMULATION RESEARCH ON DIGITAL SPEED CONTROL SYSTEM OF AEROENGINE

本文介绍航空发动机转速数控系统的动态实时模拟研究,包括微机内控制算法的设计,高频干扰信号对系统稳定工作的影响,超转和溢出故障的处理等内容。通过模拟试验,得出了一些有益的结论。

This paper describes the real time dynamic simulation research on the digital speed control system of an aeroengine under small perturbation conditions. The control calculation approach has been programmed for a microcomputer. The proportional derivative control is applied to the large error region and the proportional control to the small error region. Furthermore, in the small error region, the large proportional constant control is adopted if the error increment tends to increase, and the small proportional costant control is employed when it tends to decrease. For the sake of normal operation in the digital speed control system, the influence of the high frequency disturbance, the overspeed and spillover in the microcomputer have been eliminated. Finally, the flow chart of the program and the real time simulation tests are demonstrated. The test results and some useful conclusions are also presented.