共查询到20条相似文献,搜索用时 265 毫秒
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针对一类基于T-S模糊模型描述的非线性时滞系统,研究在一般执行器故障模式下的含时滞记忆的鲁棒H∞容错控制器设计问题.针对任意连续型执行器故障模式,采用并行分布式补偿原理设计含记忆型状态反馈控制器,给出非线性时滞系统在执行器发生故障情况下的鲁棒镇定准则.然后给出H∞性能指标约束下的满意容错控制器的设计方法和设计步骤.提出的含时滞记忆的状态反馈控制方法可以确保当执行器发生故障时,闭环系统不仅具有渐近稳定性,而且有一定的抗扰动性能,状态反馈控制器设计的保守性较不含时滞记忆控制器设计方法大大降低.仿真实例验证了鲁棒容错控制策略的有效性. 相似文献
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考虑了不确定离散时滞系统经动态输出反馈的保性能控制器设计问题.利用离散时滞系统的广义系统表示形式以及有关向量交叉乘积项的界的处理方法,以线性矩阵不等式的形式,给出了一个时滞依赖的保性能输出反馈控制器存在的充分条件.一个数值例子说明了所给方法的有效性. 相似文献
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一阶时滞不稳定过程的复合PID控制 总被引:4,自引:0,他引:4
针对一阶时滞不稳定过程讨论了一类复合PID控制及其参数整定公式.该方法基于分步设计的思想,在比例控制器镇定基础上对闭环所构成的广义稳定对象,设计二级PID控制器.在二级控制器设计中,通过引入时滞二阶稳定模型优化PID参数.本文同时讨论了等价的二自由度PID控制器. 相似文献
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倒立摆本身是一个自然不稳定系统,时滞的存在更加恶化了系统性能。基于牛顿动力学方法建立了具时滞单级倒立摆系统的动力学模型,运用线性二次型最优控制策略设计了倒立摆控制器,将时滞环节采用Padé一阶对称逼近,通过Routh稳定判据,得到闭环系统的临界稳定的时滞大小。通过实例仿真进行验证,并与PID控制策略相比较,结果表明本文方法正确,所设计的最优控制器性能优于PID控制器,在临界时滞范围内有较好的控制效果,但与无时滞时相比,系统的动态性能有所降低。 相似文献
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时滞中立型线性系统的变结构控制 总被引:2,自引:0,他引:2
本文研究了一类时滞中立型线性的变结构控制问题,在系统谱可控的条件下给出了具有稳定的油动模态的切换泛函的构造方法,并利用渐近率的概念和方法设计了该系统的变结构控制器,得到一般时滞中立型系统可变换成所需要的时滞中立型系统的条件。 相似文献
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滞后抛物型控制系统的变结构控制 总被引:5,自引:1,他引:5
讨论了滞后抛物型控制系统的变结构控制问题。通过对系统进行直接分析,给出了仅由状态函数描述的变结构控制器的设计方法。所得结果削弱了文献[7,10]中对系统的某些要求,减化了变结构控制器的设计步骤,并且给出了整个切换面为滑动模态区的条件以及轨线到达滑动模态区上的时间估计。 相似文献
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Amar Si Ammour Said Djennoune Woihida Aggoune Maamar Bettayeb 《Asian journal of control》2015,17(5):1946-1954
This paper describes a variable structure control for fractional‐order systems with delay in both the input and state variables. The proposed method includes a fractional‐order state predictor to eliminate the input delay. The resulting state‐delay system is controlled through a sliding mode approach where the controller uses a sliding surface defined by fractional order integral. Then, the proposed control law ensures that the state trajectories reach the sliding surface in finite time. Based on recent results of Lyapunov stability theory for fractional‐order systems, the stability of the closed loop is studied. Finally, an illustrative example is given to show the interest of the proposed approach. 相似文献
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Variable Gain Output Feedback Control of A Networked Temperature Control System Based on Online Delay Estimation 下载免费PDF全文
In this paper, a gradient descent method based delay estimator is proposed for use with a variable gain control strategy for networked control systems. The delay estimator is developed in such a way that its boundedness is ensured. The performance of the estimator with variable gain controller is evaluated on a temperature control plant with network in the feedback loop. 相似文献
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《Automatic Control, IEEE Transactions on》2005,50(8):1074-1089
Handling delays in control systems is difficult and is of long-standing interest. It is well known that, given a finite-dimensional linear time-invariant (LTI) plant and a finite-dimensional LTI stabilizing controller, closed-loop stability will be maintained under a small delay in the feedback loop. However, in some situations there is a large delay, perhaps arising from a slow communications link or a large but variable computational delay (e.g., in a system which uses image processing). While there are techniques available to design a controller to handle a known delay, there is no general theory for designing a controller to handle an arbitrarily large uncertain delay. Here we prove constructively that, given a finite-dimensional LTI plant and an upper bound on the admissible time delay, there exists a linear periodic controller which robustly stabilizes the plant. 相似文献