共查询到20条相似文献,搜索用时 78 毫秒
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主要探讨周期性系统(包括连续和离散两种情形)的能控性问题,对文献中有关周期为To的连续周期性系统的能控性结论进行了完善,推导出系统能控等价于单周期(0,To)内能控的结论,并将这些结论直接推广到离散周期性系统;然后讨论了离散前后周期性系统能控性保持不变的可能性,证明在采用不等间距采样方式时,离散前后周期性系统的能控性保持不变。 相似文献
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即使已知非仿射非线性系统的逆存在,利用隐函数定理求解该显式逆仍然非常困难.为此,针对一类不确定块控非仿射系统,将动态反馈、反演、神经网络和反馈线性化技术相结合,提出一种自适应鲁棒控制器的设计方法.利用神经网络来逼近和消除未知函数,并证明了整个闭环系统在李雅普诺夫意义下是稳定的.仿真结果表明了所提出方法的有效性. 相似文献
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DC-DC变换器在恒功率负载下的能控性 总被引:1,自引:0,他引:1
带有恒功率负载的DC-DC变换器是切换非线性系统.以Boost变换器为例,本文建立了其切换系统模型;它包括三个模态.模态I,II,III分别对应于开关器件导通、关断、电感电流断续时的电路拓扑.因为电容电压是非负的,所以本文对平面拓扑学的最新结果加以修正,导出了半平面仿射非线性系统全局能控的充分必要条件——判别函数在任意非零控制曲线上变号.据此证明了模态II的全局能控性.由于模态II为运转中的必经阶段,故切换系统能控.研究方法也适用于Buck等变换器的能控性分析. 相似文献
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感应电动机系统的能控性与能观测性分析 总被引:7,自引:0,他引:7
分析了感应电动机系统的能控性与能观测性。结果表明系统是弱能控与弱能观的。而且,采用非线性状态反馈解耦控制和非线性坐标变换后的局部闭环解耦线性系统是能控与能观的。 相似文献
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提出一种基于受控因子的非线性能控性分析方法,引入受控因子与阶次差的概念,分析了相同阶次差的受控因子间的关系,给出了一种判别多项式矩阵满秩的方法,最后以文献(1)给出的结论为基础,推导了判别非线性系统弱能控性的新判据。 相似文献
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本文针对一般线性切换系统,严格定义了系统的能控性、能达性和能控集、能达集,导出了能控性的一个必要条件,给出了三维单输入双切换系统能控性的充分必要条件,并指出现有文献中有关结论的一个错误. 相似文献
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C. Vrsan 《Systems & Control Letters》1982,2(4):243-247
In the paper sufficient conditions for ‘deterministic weak controllability’ of nonlinear Itô equations of the form are given. 相似文献
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Sufficient conditions are established for the global relative controllability of nonlinear system consisting of a bilinear mode with time-varying delays in control. The results are a generalization of previous results and are obtained by using Schauder's fixed point theorem. 相似文献
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Henk Nijmeijer 《Systems & Control Letters》1982,2(3):163-168
The paper deals with the invertibility of multivariable non-linear control systems. By using the recently developed theory on controlled invariant and controllability distributions necessary and sufficient conditions for invertibility are derived. 相似文献
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In this letter we present a decomposition for control systems whose drift vector field is the geodesic spray associated with an affine connection. With the geometric insight attained with this decomposition, we are able to easily prove some special results for this class of control systems. Examples illustrate the theory. 相似文献
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L. Q. Thuan 《控制理论与应用(英文版)》2014,12(1):35-47
In the context of continuous piecewise affine dynamical systems and affine complementarity systems with inputs, we study the existence of Zeno behavior, i.e., infinite number of mode transitions in a finite-length time interval, in this paper. The main result reveals that continuous piecewise affine dynamical systems with piecewise real-analytic inputs do not exhibit Zeno behavior. Applied the achieved result to affine complementarity systems with inputs, we also obtained a similar conclusion. A direct benefit of the main result is that one can apply smooth ordinary differential equations theory in a local manner for the analysis of continuous piecewise affine dynamical systems with inputs. 相似文献
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Within the affine connection framework of Lagrangian control systems , based on the results of Sussmann on small- time locally controllability of single- input affine nonlinear control systems , the controllability results for mechanical control systems with single- input are extended to the case of the systems with isotropic damping ,where the Lagrangian is the kinetic energy associated with a Riemannian metric. A sufficient condition of negative small- time locally controllability for the system is obtained. Then ,it is demonstrated that such systems are small- time locally configuration controllable if and only if the dimension of the configuration manifold is one. Finally , two examples are given to illustrate the results. Lie bracketting of vector fields and the symmetric product show the advantages in the discussion. 相似文献
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Within the affane connection framework of Lagrangian control systems, based on the results of Sussmann on small-time locally controllability of single-input affine nonlinear control systems, the controllability results for mechanical control systems with single-input are extended to the case of the systems with isotropic damping, where the Lagrangian is the kinetic energy associated with a Riemannian metric, A sufficient condition of negative small-time locally controllability for the system is obtained.Then,it is demonstrated that such systems are small-time locally configuration controllable if and only if the dimemion of the configuration manifold is one. Finally, two examples are given to illustrate the results. Lie bracketting of vector fields and the symmetric product show the advantages in the discussion. 相似文献
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This paper addresses the stabilization problems for nonlinear affine systems. First of all, the explicit feedback controller is developed for a nonlinear multiple-input affine system by assuming that there exists a control Lyapunov function. Next, based upon the homogeneous property, sufficient conditions for the continuity of the derived controller are developed. And then the developed control design methodology is applied to stabilize a class of nonlinear affine cascaded systems. It is shown that under some homogeneous assumptions on control Lyapunov functions and the interconnection term, the cascaded system can be globally stabilized. Finally, some interesting results of finite-time stabilization for nonlinear affine systems are also obtained. 相似文献