共查询到19条相似文献,搜索用时 46 毫秒
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针对线性参数变化(LPV)系统提出一种切换控制器参数化设计方法.基于Youla参数化思想,将控制器设计过程分解为两个步骤.首先,设计一个中心控制器保证闭环系统的全局$H_infty$性能;其次,将参数变化区域划分为若干个子区域,在每个子区域中将中心控制器进行线性分式变换,得到切换控制器自由参数的状态空间实现,将切换控制器转换为自由参数之间的切换.基于所提出的切换LPV控制器线性分式变换实现方法,不仅可以保证在任意切换的情况下子系统各自局部的$H_infty$性能,而且可以保证整个闭环系统满足某一整体的$H_infty$性能,并通过仿真结果验证了所提出方法的有效性. 相似文献
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黄威 《数字社区&智能家居》2009,5(3):1740-1742,1751
研究了一类不确定切换广义系统的H∞状态反馈控制问题,以线性矩阵不等式(LMI)的形式给出了该类系统的鲁棒稳定且具有H∞扰动衰减度γ充分条件和控制器以及切换策略。将正常系统的Lyapunov函数研究方法推广到切换广义系统。 相似文献
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鲍乐平;黎曦 《计算机工程与应用》2025,(11):335-341
针对分布参数切换系统,设计反馈控制器和切换规则,使得相应闭环系统指数稳定且满足一定的性能指标。利用共同Lyapunov函数方法,通过Lyapunov稳定性定理、Poincare不等式和线性矩阵不等式(LMIs)等,得到分布参数切换系统保性能控制存在的充分条件。和已有结果相比较,将分布参数切换系统保性能控制概念进行了推广,并且充分考虑了分布切换参数系统中Laplace算子系数对系统性能的影响,降低了保守性。提出切换Lyapunov函数方法结合驻留时间方法,建立分布参数切换系统保性能控制存在的条件。通过计算机仿真验证所提出方法的有效性和优越性。 相似文献
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考虑时变参数系统的切换H∞控翻问题.提出了由参数触发的切换策略,由此在最小驻冒时间的限制下,将线性时变参数系统分解为若干具有范数有界不确定性的子系统.利用多Lyapunov函数方法分别设计各子系统的输出动态反馈控制器.使在切换策略驱动下构成的闭环系统满足H∞控制性能.仿真算例完整地实现了理论方法,并验证了其有效性. 相似文献
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基于H∞控制理论以及切换系统稳定性理论,对于多输入多输出(MIMO)多模型切换控制系统,提出了一种可以有效抑制抖动和改善瞬态响应性能的鲁棒镇定控制器设计方法.通过引入PI控制思想,根据模型跟踪方法设计了增广状态反馈控制器,并将控制器设计问题转化为方便求解的线性矩阵不等式(LMI).该方法的最大优点是可以很方便的保证多模型切换系统的全局稳定性,同时使得设计的控制器具有较强的鲁棒性.将本文提出的方法应用到某型BTT导弹自动驾驶仪设计中,仿真结果证明了此方法的有效性和优越性. 相似文献
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Supervisory control using a new control-relevant switching 总被引:1,自引:0,他引:1
This paper presents a new supervisory control scheme, which is based on a control-relevant switching logic. Unlike most of the existing switching methods considering only estimator performance, the proposed scheme takes both estimator and controller performance into account. As an index to the controller performance, an iISS (integral-input-to-state stability) Lyapunov function is employed; it is ensured that the Lyapunov function satisfies a certain inequality. This Lyapunov-based switching is then coupled to the state-dependent dwell-time switching developed recently, and the state of the uncertain plant is shown to converge asymptotically. The proposed supervisory control scheme is applied to an input-constrained neurally stable linear plant. 相似文献
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Higher order numerical approximation of switching systems 总被引:1,自引:0,他引:1
Higher order numerical schemes for affine nonlinear control systems developed elsewhere by the authors are adapted to switching systems with prescribed switching times. In addition the calculation of the required multiple switching control integrals is discussed. These schemes are particularly useful in situations involving very rapid switching. 相似文献
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目前高速公路切换混乱,切换次数较多,频繁切换到离高速公路较远的基站,容易导致通话质量差和掉话。为规范高速公路沿线基站的切换,本文根据特定小区和切换场景进行了切换关系、切换类型、小区覆盖半径、重叠区域、参数设定等方面的研究和规范,通过大量的测试分析形成了高速公路鱼骨型切换链模型。这种切换链模式能有效解决高速公路专网和外网小区频繁切换的问题,提高高速公路测试的各项指标。 相似文献
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This paper presents a linear matrix inequality (LMI) approach to solve the fault-tolerant control (FTC) problem of actuator faults. The range of actuator faults is considered as a parameter region and subdivided into several subregions to achieve a certain desired performance specification. Based on the integral quadratic constraint (IQC) approach, a passive fault-tolerant controller for the whole fault region and multiple fault-tolerant controllers for each fault subregion are designed for guaranteeing stability and improving performance of the FTC system, respectively. According to the estimation of parameters by FDI process, the corresponding subregion controller is chosen for the stability and optimal performance of closed-loop systems when the fault occurs. The case of incorrect estimation is also considered by comparing the performance index between the switched controller and the passive fault-tolerant controller. The proposed design technique is finally evaluated in the light of a simulation example. 相似文献
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针对一类特殊的混杂系统——切换系统的最优控制问题.利用控制函数参数化方法和时间尺度转化法,将切换系统最优控制问题转化为最优参数选择问题,可利用Miser3.2来求解该问题,这样能有效地简化求解切换系统最优控制的难度,而且算法易于理解,编程易于实现。 相似文献
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首先将汽车主动悬架的控制问题归结为有时域硬约束的鲁棒干扰抑制问题.在多目标控制框架下,基于线性矩阵不等式(LMI)优化技术,提出了一种H2/广义H2混合控制策略:利用广义H2范数描述系统的时域硬约束,同时选择H2范数最小化系统的性能输出,最终将系统的控制律归结为求解具有LMI约束的半定规划问题.以半车模型为例设计了主动悬架控制器,并给出了较全面的分析和仿真结论.最后利用快速原型(RCP)和硬件在回路仿真(HILS)一体化技术进一步验证所提方法的有效性和可行性. 相似文献
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In this paper, a new approximate effective availability method of the point-to-group blocking probability calculation in switching networks carrying a mixture of different multi-rate unicast and multicast traffic streams is presented. Until recently, such methods have only been proposed for the single-services switching networks. To the best of our knowledge, methods of blocking probability calculation for multi-service switching network with multicast connection have not yet been considered. In this paper, four algorithms of setting-up multicast connections in multi-service switching networks are considered and discussed. Special attention is paid to the methods for determining the effective availability parameter in the case of multicast connections. The results of the analytical calculations are compared with the data of the digital simulations of the switching networks with unicast and multicast connections. 相似文献