航空发动机多变量变增益控制器设计及仿真

发布时间：2018-01-08 01:07

本文关键词：航空发动机多变量变增益控制器设计及仿真　出处：《北京航空航天大学学报》2016年09期 　论文类型：期刊论文

【摘要】：针对航空发动机全包线工作下的多变量变增益控制器设计问题,给出了一种改进的埃德蒙德算法(以下简称KQ算法)并进行了仿真应用。首先,阐明了多变量KQ算法的控制原理与优化算法,进而通过闭环期望函数选择、控制器结构选择以及控制器参数优化进行了KQ控制器设计,并针对所设计的KQ控制器,给出了稳定性证明和系统奇异值分析。分析表明所设计KQ控制器能够使系统闭环稳定,且具有满意的低频指令跟踪、干扰抑制能力、传感器噪声的抑制、高频未建模动态的鲁棒稳定性和低频发动机建模误差不敏感等性能,满足发动机控制要求。其次,通过调度变量选择、设计点KQ控制器设计以及采用插值方法的非设计点KQ控制器设计等过程实现某型涡扇发动机的多变量KQ变增益控制器设计研究,并进行仿真验证。仿真结果表明,设计点条件下,当涡轮后温度和增压比参考输入均为阶跃信号时,其被控参数响应速度很快,且上升时间均小于1 s,耦合影响小于6%,设计点KQ控制器满足控制要求;非设计点条件下,利用插值方法建立的KQ变增益控制器具有较好的性能,能够实现该型涡扇发动机全包线控制性能要求。
[Abstract]:An improved Ednunde algorithm (hereinafter referred to as KQ algorithm) is proposed for the design of variable variable gain controller (VGC) under the full envelope operation of aero-engine. The control principle and optimization algorithm of multivariable KQ algorithm are expounded, and then the design of KQ controller is carried out through the selection of closed-loop expected function, the selection of controller structure and the optimization of controller parameters. For the designed KQ controller, the stability proof and singular value analysis of the system are given. The analysis shows that the designed KQ controller can make the system closed-loop stable and has satisfactory low frequency command tracking. Interference suppression capability, sensor noise suppression, high frequency unmodeled dynamic robust stability and low frequency engine modeling error are insensitive to meet the requirements of engine control. Secondly, through scheduling variables selection. The design of a multi-variable KQ variable gain controller for a turbofan engine is realized by the design of the KQ controller and the non-design point KQ controller using interpolation method. The simulation results show that the response speed of the controlled parameters is fast and the rise time is less than 1 s when the temperature and the booster ratio reference input are step signals at the design point. The coupling effect is less than 6 and the design point KQ controller meets the control requirements. Under the condition of non-design point, the KQ variable gain controller established by interpolation method has better performance and can meet the requirements of the full envelope control performance of the turbofan engine.
【作者单位】：西北工业大学动力与能源学院;中航工业西安航空动力控制科技有限公司;
【分类号】：V233.7
【正文快照】： 网络出版地址:www.cnki.net/kcms/detail/11.2625.V.20151022.1940.003.html引用格式:李嘉,李华聪,徐轩,等.航空发动机多变量变增益控制器设计及仿真[J].北京航空航天大学学报,2016,42(9):1958-1968.LI J,LI H C,XU X,et al.Multi-variable variable gain controller design a

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