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本文研究了不确定线性时滞系统的稳定化鲁棒控制器设计问题,给出了一类不确定线性时滞系统稳定化鲁棒控制器的设计方法,对于一般的不确定线性时滞系统,如果它们的标称系统是二次型能稳的,则该不确定线性时滞系统也是能稳的,且给出了其稳定化控制器的设计方法。 相似文献
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对一类同时具有状态时滞和输入时滞的不确定离散时滞系统,提出保性能状态时滞反馈控制律的设计问题。结合一个二次型性能指标,基于Lyapunov函数和线性矩阵不等式处理方法,推出状态时滞反馈保性能控制律存在的条件,并用线性矩阵不等式的可行解给出保性能控制律的构造方法。最后给出一个仿真例子证明该方法的有效性。 相似文献
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分析了振铃现象产生的本质原因,在改进原有方法的基础上提出一种新的单变量Dahlin控制器设计方法.克服了原有方法的局限,设计的控制器不会产生振铃现象. 相似文献
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Lurie滞后反馈控制系统绝对稳定的鲁棒扰动界 总被引:7,自引:0,他引:7
本文应用Lyapunov方法讨论了具有时滞反馈的
Lurie控制系统的鲁棒绝对稳定性,给出了具有一个和多个滞后反馈的Lurie控制系统的绝对
鲁棒稳定的充分条件.用本文的结论可直接计算具有时滞反馈的Lurie控制系统绝对稳定的
鲁棒扰动上界.文末给出了应用本文结论的例子. 相似文献
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在应用时滞元件滤波器校正连续控制系统时,滤波器的传递函数必需满足几个条件.不然,自动控制系统将是不稳定的;或者当系杭参数稍微变动时,系统既变为不稳定的.本文论述了时滞元件滤波器必需满足的条件,并且指出,某些文献由于没有注意到这些必要条件,因而有些结论需作具体商讨. 相似文献
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The robust tracking and model following problem of linear uncertain time‐delay systems is investigated in this paper. By using the solution of the algebraic Riccati equation, this paper presents a direct approach to the design of robust tracking controllers. The system is controlled to track dynamic inputs generated from a reference model. In the case of matched uncertainties, the proposed controller ensures uniform ultimate boundedness of tracking errors and, furthermore, the bounds can be made arbitrarily small. In the case of mismatched uncertainties, a sufficient condition is presented such that the controller guarantees uniform ultimate boundedness of tracking errors. Compared with existing results, the main feature of the approach proposed in this paper is that it does not require any precompensator even for the non‐Hurwitz nominal system and, obviously, it is a direct method. It also employs linear controllers rather than nonlinear ones. Therefore, the designing method is simple for use and the resulting controller is easy to implement. Numerical examples show that this scheme can accommodate larger uncertainties and is likely to produce less conservative results. 相似文献
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This paper focuses on the feedback control of a linear single-input single-output process in the presence of input saturation constraints. First, closed-loop stability is guaranteed through the use of a parametrization of all nonlinear stabilizing controllers in terms of an S-stable parameter Q. Then, a performance measure is proposed that quantifies closed-loop performance with respect to a finite number of disturbances. Subsequently, the best achievable performance is quantified over a class of nonlinear stabilizing controllers parametrized in terms of absolutely summable second order Volterra operators. The resulting computational procedure involves the solution of a sequence of MILP's. An illustrative example is employed to demonstrate the proposed procedure. This example establishes that, for this performance measure, there may exist a value of the saturation bound for which the best achievable control system performance of the saturating system is strictly better than the corresponding best achievable linear performance. The same example also demonstrates that nonlinear control can perform strictly better than linear control for a performance measure that employs a finite number of disturbances. © 1997 by John Wiley & Sons, Ltd. Int. J. Robust Nonlinear Control, Vol. 7, 449–474 (1997). 相似文献