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In this paper, the problem of reliable H controller design is studied for a class of nonlinear networked control systems. A novel model is presented, which contains random transmission delays, faults of the sensor and actuator. The sensor‐to‐controller and controller‐to‐actuator transmission delays with upper bounds are considered, simultaneously. The working conditions of the sensor and actuator are formulated as two independent Markov chains, which take matrix values in finite sets, respectively. The resulting closed‐loop system is converted into a Markov switching system. On the basis of the cone complementary linearization algorithm, a mode‐dependent reliable controller is constructed such that the closed‐loop system is stochastically stable and attains the prescribed H disturbance attenuation level. Finally, a numerical example is given to show the effectiveness of the developed technique.  相似文献
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An H-infinifty variable structure control is presented for singular Markov switched systems with mismatched norm-bounded uncertainties and mismatched norm-bounded external disturbances. It is shown that the sliding mode dynamics on the given switching surface is regular, impulse-free, and stochastically stable and satisfies H-infinity performance. A variable structure controller is designed to guarantee that the system trajectory converges to the linear switching surface in some finite time. Finally, a numerical example is solved to show the effectiveness and validness of the theoretical results.  相似文献
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An H-infinifty variable structure control is presented for singular Markov switched systems with mismatched norm-bounded uncertainties and mismatched norm-bounded external disturbances. It is shown that the sliding mode dynamics on the given switching surface is regular, impulse-free, and stochastically stable and satisfies H-infinity performance. A variable structure controller is designed to guarantee that the system trajectory converges to the linear switching surface in some finite time. Finally, a numerical example is solved to show the effectiveness and validness of the theoretical results.  相似文献
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在Markov跳变系统的估计问题中,目前的多模型估计器采用模型概率检测模型切换;这是一种基于信号幅值的检测方法;事实上,模型切换表征了系统的暂态过程,因而系统某些特征的频谱特性在模型切换前后存在差异;因此提出一类Markov跳变系统的综合时频分析模型切换检测方案(ITFA);同时给出统计意义下的模型检测评价指标;仿真结果表明:与标准的交互式多模型算法相比,ITFA方法具有检测概率高、延迟时间小的优点;同时,ITFA对于先验性的滑窗长度、检测阈值具有较好的鲁棒性.  相似文献
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李顺祥  田彦涛 《控制工程》2004,11(4):325-328
根据混合系统离散状态的动态行为和Markov链的状态也是离散的特点,提出了一类离散状态的动态行为是Markov链的混合系统。与传统的混合系统相比,这类系统能够刻画出混合系统离散动态行为的随机性,可以用来描述系统受到外界环境因素制约和内部突发事件等随机因素影响而发生变化的动态行为。根据动态系统的稳定性定义以及随机过程理论,给出了Markov线性切换系统的随机稳定性定义,并且分析了Markov线性切换系统的随机稳定性问题,给出了判定随机稳定性的充分必要条件。  相似文献
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针对系统状态演化多模不确定性和状态约束多样性, 本文提出了跳变约束下马尔可夫切换非线性系统的 交互式多假设估计方法. 定义了包含跳变马尔可夫参数可能取值的假设集, 根据最优贝叶斯滤波, 推导出状态与假 设的后验概率递推更新. 基于统计线性回归线性化非线性函数, 利用伪量测法, 将线性化的约束扩维到真实量测中, 给出了非线性系统滤波的近似解析最优解. 最终给出所提算法的稀疏网格积分近似最优估计实现. 在交叉道路机动 目标跟踪仿真场景中, 所提算法的滤波精度优于基于泰勒展开的交互式多模型算法, 基于统计线性回归的交互式多 模型算法, 以及基于泰勒展开的非线性系统约束滤波算法.  相似文献
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