共查询到20条相似文献,搜索用时 15 毫秒
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研究了一类不确定区间系统具有完整性的状态反馈控制设计问题 ,其中不确定性描述为系统状态矩阵的各个元素在一些确定的区间内变化。在给出区间系统的一种等价描述后 ,利用Lyapunov稳定性理论 ,导出了闭环区间系统具有完整性的充分条件 ,给出了相应的状态反馈控制器设计方法及具体设计步骤。最后通过数值算例说明了所提设计方法的有效性。 相似文献
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《系统科学与复杂性》2021,(5)
This paper presents an overview of the state of the art for safety-critical optimal control of autonomous systems. Optimal control methods are well studied, but become computationally infeasible for real-time applications when there are multiple hard safety constraints involved. To guarantee such safety constraints, it has been shown that optimizing quadratic costs while stabilizing affine control systems to desired(sets of) states subject to state and control constraints can be reduced to a sequence of Quadratic Programs(QPs) by using Control Barrier Functions(CBFs) and Control Lyapunov Functions(CLFs). The CBF method is computationally efficient, and can easily guarantee the satisfaction of nonlinear constraints for nonlinear systems, but its wide applicability still faces several challenges. First, safety is hard to guarantee for systems with high relative degree, and the above mentioned QPs can easily be infeasible if tight or time-varying control bounds are involved. The resulting solution is also sub-optimal due to its myopic solving approach. Finally, this method works conditioned on the system dynamics being accurately identified. The authors discuss recent solutions to these issues and then present a framework that combines Optimal Control with CBFs, hence termed OCBF, to obtain near-optimal solutions while guaranteeing safety constraints even in the presence of noisy dynamics. An application of the OCBF approach is included for autonomous vehicles in traffic networks. 相似文献
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不可分动态离散系统的两级最优控制算法 总被引:2,自引:0,他引:2
讨论了不可分动态系统的最优控制问题 .提出了一种两级最优控制算法 .该算法首先把不可分问题转化为多目标最优控制问题 ,并用加权 Lagrangian公式产生非劣解 ,然后从非劣解集中挑出最优解 .建立了算法的理论基础 ,证明了算法的收敛性 .对两个例子的仿真结果表明算法是有效的 . 相似文献
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产业劳动力结构的建模及控制 总被引:3,自引:0,他引:3
创建了产业劳动力结构模型,并研究了在考虑Cobb-Douglas函数时的最优控制问题,结果表明,在追求最大经济效益的前提下,劳动力的转移与比较劳动生产率密切相关 相似文献
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对于伴随着松弛和耗散的Lindblad型开放量子系统,采用基于Liouville超算符变换的方法,将开放量子系统的动力学微分方程的矩阵表达形式转化成向量表达以简化微分方程的求解。以系统被控状态到达目标状态的期望值为性能指标,对变换后的开放量子系统进行最优控制律的设计,以达到状态转移的目的。在MATLAB环境下以2能级开放量子系统为例进行了系统仿真实验。对控制参数的变化对系统的布居数转移概率及其控制时间的影响进行了对比实验,并对实验结果进行了对比分析。Abstract: In order to solve the state of an open quantum system with relaxation and dissipation,the dynamical equation of the system in matrix was transformed into vector form in Liouville space. Taking the expectation value for the state under control reaching the target state as performance indicators,an optimal control function was derived for the system transformed. The control a 2-level open quantum system was simulated on in MATLAB. The influence to population transfer probability and control time caused by changing of parameters were analysed contrastively. 相似文献
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汽车主动悬架系统的最优跟踪控制 总被引:1,自引:0,他引:1
研究汽车主动悬架系统的线性二次型最优跟踪控制问题.基于两自由度1/4汽车悬架主动控制模型,通过利用参考输入外系统的状态来构造前馈控制作用,得到了系统的最优跟踪控制律.该跟踪控制律由状态反馈项和前馈补偿项构成,前馈增益可以通过求解矩阵方程得到.仿真算例表明了采用前馈反馈控制方法进行悬架系统最优跟踪设计的有效性. 相似文献
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This paper studies the coordination control of nonlinear multi-agent systems under asynchronous switching, including consensus, tracking control, and containment. The asynchronous switching considered here means that the switching of the controller lags behind the mode's switching for each agent. So the matched controller is interrupted by the delayed switching. For the situation, the authors give some new results by applying the conventional distributed control protocol. The authors show that all agents can achieve consensus. Secondly, the authors show that all followers can track the actual leader. Thirdly, the authors show that all followers will converge to the convex hull spanned by the dynamic leaders as time goes on. Numerical simulations are also provided and the results show highly consistent with the theoretical results. 相似文献
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EPA网络控制系统时钟同步主时钟控制算法研究 总被引:1,自引:0,他引:1
为满足EPA网络控制系统时间同步的高精度要求,由EPA子网通讯确定性调度机制构建虚拟链路,建立基于时钟精度差的多层次主时钟选择算法.引入IEEE 1588时钟变量σPTP,动态调整时钟精度偏差(CPD:Clock Precision Difference)与时间值偏差(TVD:Time Value Difference)为权重的时钟优先级(CP),建立-种二维模糊控制器确定设备时钟性能优劣层次,而系统采用公平竞争的方法从众多现场设备中快速、准确地决策一个时钟性能最好的设备作为EPA系统的最佳主时钟,保证了系统运行的稳定性,降低了本地时钟的波动,使时钟同步精度提高到50微秒. 相似文献
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研究了非线性分布时滞系统的最优控制,提出了一种基于线性分布时滞模型和二次型性能指标问题的迭代算法。在模型和实际存在差异的情况下,该算法通过迭代求解分布时滞线性最优控制问题和参数估计问题,获得原问题的最优解。仿真实例表明该算法的有效性和实用性。 相似文献
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《系统科学与复杂性》2021,(5)
This work is concerned with controlled stochastic Kolmogorov systems. Such systems have received much attention recently owing to the wide range of applications in biology and ecology.Starting with the basic premise that the underlying system has an optimal control, this paper is devoted to designing numerical methods for approximation. Different from the existing literature on numerical methods for stochastic controls, the Kolmogorov systems take values in the first quadrant. That is, each component of the state is nonnegative. The work is designing an appropriate discrete-time controlled Markov chain to be in line with(locally consistent) the controlled diffusion. The authors demonstrate that the Kushner and Dupuis Markov chain approximation method still works. Convergence of the numerical scheme is proved under suitable conditions. 相似文献