不确定性无尾飞行器LPV变增益控制器设计  

Design of LPV Gain-Scheduling Controller to Uncertain Tailless Aircraft

作　　者：李文强[1] 郑志强[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,湖南长沙410073

出　　处：《控制工程》2009年第4期478-480,484,共4页Control Engineering of China

基　　金：湖南省自然科学基金资助项目(07JJ3127)

摘　　要：无尾式飞行器由于其独特的优点成为今后飞行器发展的方向,其飞行包线范围大,参数变化剧烈,需要对其在整个工作区域内实行控制。采用基于线性变参数(LPV)系统的变增益控制方法,利用多胞形模型法对系统进行增益调度,提出一种简单实用的变参数顶点凸分解方法,该方法利用动态系统的间隔度量对顶点进行加权求和,在保证系统稳定的情况下,确保系统达到更佳的性能指标。充分考虑了无尾式飞行器的不确定性,利用线性矩阵不等式对某无尾式飞行器进行控制器设计,非线性仿真结果表明该方法能够在参数变化剧烈的情况下,使得系统在1.5s内收敛,并且没有超调量,同时系统状态变量变化平缓,证明了该方法在大范围工作区域内的有效性。The tailless aircraft with big flight envelop and big parameter variation is the development direction of aircraft because of its advantage, and is controlled within entire work region due to its varying parameters. The gain scheduling based LPV svstem is adopt- ed, and the gain of plant is scheduled using polytope model. 4 simple and applicable method to convex decomposition is proposed using gap metric of dynamic system to make weighted sum. This decompositi,m has the optimal pertormance when the stabilityis guaranteed. The uncertainties are eonsidered, and the robusl controller was designed using LMI to reduce the constraints and computation. Nonlinear simulation result shows that the controller can control the tailless aircraft to convergence within 1.5 s, without overshoot and have smooth varying states in big variation. The result shows that this method is available to the control svsten, with big work region.

关 键 词：无尾式飞行器 不确定性 LPV系统 线性矩阵不等式 增益调度 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]