一种航空发动机相似多变量控制方法
Theory of Similarity Based Aeroengine Multivariable Control Method
-
摘要: 推导了航空发动机线性二次型调节器(LQR)方法相似化公式,分析并指出了存在的问题:(1)在高空低马赫数时,系统响应速度太慢,无法满足快速性要求;(2)在低空高马赫数时,控制增益太高,这一方面可能导致执行机构饱和,另一方面会使控制器在噪声、滞后等干扰情况下性能变坏。本文对相似LQR控制进行了改进,在一定程度上解决了上述问题。本文还证明了改进的相似LQR控制的稳定性,并将其推广至增广LQR方法。Abstract: The procedure of applying the theory of similarity to LQR method in aeroengine control systems was developed.The method was analyzed and the shortcomings were pointed out:(1) the closed-loop system responds slowly at high altitude and low Mach number,which can not meet the swift respond requirement;(2) the closed-loop system requires too much control energy at low altitude and high Mach number.On one hand,this is very likely to cause aeroengine actuator saturation.On the other hand,this would degrade the performance of the closed-loop system under disturbances such as noises and delays.Hence,an improved procedure of applying the theory of similarity was developed and it solved the above problems reasonably well.Further more,the stability of the proposed method was proved.It was also extended to the augmented LQR method.Finally,the design procedure of a turbofan engine control system exemplified the above results.
-
[1] 孙健国.面向21世纪航空动力控制展望[J].航空动力学报,2001,16(2):97～102.Sun Jianguo.Prospects of the Aeroengine Control Development in the Early Time of the 21st Century[J].Journal of Aerospace Power,2001,16(2):97～102. [2] Frank L L.Applied Optimal Control and Estimation[M].Englewood Cliffs,N.J.Prentice Hall,1992. [3] Daniel E M,Mauro R.Simultaneous Stabilization With Near Optimal LQR Performance[J].IEEE Trans.Automat.Contr.,2001,46(10):1543～1555. [4] De Hoff R L,Hall W E Jr.Design of A Multivariable Controller for An Advanced Turbofan Engine[R].Proceedings of the Fifteenth Conference on Decision and Control and Symposium on Adaptive Processes,Institute of Electrical and Electronics Engineers,Inc.,1976:1002 ～ 1008. [5] 张加桢,化凯,郭迎清,刘芳.航空涡轮喷气发动机双变量控制系统设计[J].航空动力学报,1990,5(1):76～78.Zhang Jiazhen,Hua Kai,Guo Yingqing,Liu Fang.Two-Variable Control Sytem Design for a Turbo Engine[J].Journal of Aerospace Power,1990,5 (1):76～78. [6] 章霖官,刘爱萍,林青峰.在平台上进行的涡扇发动机控制系统数字仿真[R].第十届发动机自动控制专业学术交流会:青岛,2000. [7] 杨刚,孙健国,李秋红.航空发动机控制系统中的增广LQR 方法[J].航空动力学报,2004,19(1):153～158.Yang Gang,Sun Jianguo,Li Qiuhong.Augmented LQR Method for Aeroengine Control Systems[J].Journal of Aerospace Power,2004,19(1):153～ 158. [8] 姚华,蒋平国,孙健国,"某型发动机数控系统的相似参数自适应控制研究",航空动力学报,2005,20(4):673～678.Yao Hua,Jiang Pingguo,Sun Jianguo.An Investigation of Corrected-Parameter Adaptive Control for an Aero-Engine Digital Control System[J].Journal of Aero-Space Power,2005,20(4):673～678. -
点击查看大图
计量
- 文章访问数: 1744
- HTML浏览量: 134
- PDF量: 454
- 被引次数: 0
下载: