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鲁棒输出反馈控制器设计 总被引:1,自引:0,他引:1
研究了满足匹配条件的 不 确定线性系统鲁棒输出反馈控制器的设计问题,。首先推导了受约束Lyapunov问题的两个构造性结论,基于此,给出输出反馈控制器的设计。最后的算例表明了该方法的有效性。 相似文献
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本文给出了混合H2/H∞控制的完整信息、完整控制、干扰顺馈、输出估计这四种典型情况的描述,在二次稳定意义上的混合H2/H∞性能指标下,讨论了这四种典型情况的混合H2/H∞线性反馈控制器设计,给出了充分必要条件。这四种典型情况的最优混合H2/H∞线性反馈控制器设计,归结为解一个带有参数的Rccati方程,且仅解一个Riccati方程。该Riccati方程随参数变化,饮食了单纯的H2和H∞设计,可看作是H2、H∞和混合H2/H∞的统一表达式。最后通过一个简单的例子,说明了本文的方法。 相似文献
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基于观测器的不确定时滞系统的鲁棒控制 总被引:14,自引:0,他引:14
研究不确定线性时滞系统的状态观测器和基于观测器的鲁棒控制器设计问题,其中不确定性是时变的、不要求满足匹配条件。通过构造增广系统,利用Lyapunov稳定性理论,获得了该不确定系统存在状态观测器和基于观测器的鲁棒控制器的充分条件,同时给出了相应的状态观测器和基于观测器的鲁棒控制器。所得结论推广并改进了已知的一些结果,并通过实例说明了其有效性。 相似文献
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王海晏 《计算技术与自动化》1993,12(4):6-10
本文提出了一种输出反馈控制器设计的参数化方法,同时利用投影定理给出了一个鲁棒性能指标,然后选择所得到的自由参数使上述鲁棒性能指标取最小而获得输出反馈的最优鲁棒设计。 相似文献
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基于QFT和ZPETC的高精度鲁棒跟踪控制器设计 总被引:3,自引:0,他引:3
阐述了定量反馈理论(QFT)和零相差跟踪控制器(ZOETC)的基本原理及设计方法,并给出了设计实例。在QFT和ZPETC的基础上,提出了一种是实现高精度鲁棒跟踪控制的方案,采用QFT控制保证系统的鲁棒性,通过ZPETC提高系统的跟踪精度。仿真表明,这种方法实现了QFT和ZPETC的完美结合,很适合高精度跟踪系统的鲁棒控制。 相似文献
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Simultaneous meeting of different‐nature feedback control specifications requires special attention, particularly in the presence of uncertainties. This paper introduces some ideas to obtain a feasible set of QFT bounds, analysing the compatibility of the desired control specifications and the model uncertainty. It studies general robust feedback requirements and their mapping on QFT bounds through quadratic inequalities. Analysing them, it is possible to infer the bound typology with dependence on the model of each particular specification and the uncertainty size. Two bound typologies (amongst three categories: upper, outer and lower bounds) are possible for each type of control objective. On this basis, some general hints are established to guarantee compatible bounds at each frequency, before designing the controller. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
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Juan José Martín‐Romero Montserrat Gil‐Martínez Mario García‐Sanz 《国际强度与非线性控制杂志
》2009,19(17):1959-1971
》2009,19(17):1959-1971
This paper describes an analytical formulation to compute quantitative feedback theory (QFT) bounds in one‐degree‐of‐freedom feedback control problems. The new approach is based on envelope curves and shows that a QFT control specification can be expressed as a family of circumferences. Then, the controller bound is defined by the envelope curve of this family and can be obtained as an analytical function. This offers the possibility of studying the QFT bounds in an analytical way with several useful properties. Gridding methods are avoided, resulting in a lower computational effort procedure. The new formulation improves the accuracy of previous methods and allows the designer to calculate multivalued bounds. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
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An aircraft's response to control inputs varies widely throughout its full flight envelope. Furthermore, the aircraft configuration impacts control response through variations in centre of gravity and moments of inertia. Quantitative feedback theory (QFT) is a robust control system design method which provides a full-envelope flight control system design and gives the engineer direct control over compensator order and gain. A full subsonic flight envelope FCS is designed for using QFT for four representative aircraft configurations. Flying qualities are embedded in the longitudinal design by using a control variable which varies with the aircraft's energy state throughout the flight envelope. Linear simulations with realistically large control inputs are used to validate the design. © 1997 by John Wiley & Sons, Ltd. This paper was prepared under the auspices of the US Government and it is therefore not subject to copyright in the US. 相似文献
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论述了基于定量反馈理论(QFT)的船舶航向控制器的设计方法。该方法不仅能保证闭环系统有较强的鲁棒性,还具有良好的动静态特性,特别是在系统的快速性方面较其它设计方法有较大的改善和提高。基于MATLAB的仿真实验表明运用该方法所设计的控制器具有较强的鲁棒性和自适应能力,满足性能指标的要求,具有较高的工程应用价值。 相似文献
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This paper addresses flight control system synthesis and the accommodation of controlled plant variation in an aircraft design envelope by using the frequency domain based quantitative feedback theory (QFT) robust control system design method. Plant variations considered include varying flight conditions in the flight envelope and damage to aerodynamic control surfaces. A robust flight control system is designed for the aircraft's longitudinal and lateral directional channels and validated with simulations containing nonlinear saturation elements. © 1997 by John Wiley & Sons, Ltd. This paper was produced under the auspices of the US Government and it is therefore not subject to copyright in the US. 相似文献
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Shih-Feng Yang 《International journal of control》2013,86(4):716-723
This article presents an efficient algorithm for computing quantitative feedback theory (QFT) bounds for frequency-domain specifications from plant templates which are approximated by a finite number of points. To develop the algorithm, an efficient procedure is developed for testing, at a given frequency, whether or not a complex point lies in the QFT bound. This test procedure is then utilised along with a pivoting procedure to trace out, with a prescribed accuracy or resolution, the boundary of the QFT bound. The developed algorithm for computing QFT bounds has the advantages that it is efficient and can compute QFT bounds with multi-valued boundaries. A numerical example is given to show the computational superiority of the proposed algorithm. 相似文献
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介绍了定量反馈理论(QFT)的基本原理和设计步骤;定量反馈理论作为一种新颖的频率域鲁棒控制技术,综合考虑了对象的不确定性范围和系统的性能指标要求,以定量方式进行分析设计,从而保证了设计结果具有稳定鲁棒性和性能鲁棒性;无人机飞行过程中具有较强的不确定性,气动参数会不断发生变化,运用QFT对无人机纵向飞行控制系统进行设计,可以很好解决飞行控制系统中的不确定性问题;仿真结果显示,QFT设计的控制器能够很好地满足无人机鲁棒稳定性指标和跟踪性能,符合纵向控制的要求。 相似文献
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阐述了定量反馈理论(QFT)的基本原理和设计方法,针对超燃冲压发动机不同工作状态时高超声速飞行器不确定性模型,应用多环QFT设计了高超声速飞行器纵向飞行控制系统;仿真结果表明,运用QFT方法设计的控制系统不仅具有良好的跟踪性能和抗干扰性能,而且能够很好地解决飞行控制系统由于模型参数具有不确定性而造成的控制系统鲁棒性设计问题,并从工程应用角度为高超飞行器纵向飞行控制系统提供了一种鲁棒控制设计方案。 相似文献