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一类非线性MIMO系统鲁棒自适应神经网络DSC设计 被引量:3
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作者 李铁山 王晓飞 杨新宇 《哈尔滨工程大学学报》 EI CAS CSCD 北大核心 2009年第2期121-125,共5页
为了研究一类多输入多输出强非线性系统的自适应跟踪问题,采用RBF神经网络逼近模型不确定性,外界干扰和建模误差采用非线性阻尼项进行补偿,并将动态面控制与Nussbaum增益技术结合,提出了一种鲁棒自适应神经网络跟踪控制算法.该算法不仅... 为了研究一类多输入多输出强非线性系统的自适应跟踪问题,采用RBF神经网络逼近模型不确定性,外界干扰和建模误差采用非线性阻尼项进行补偿,并将动态面控制与Nussbaum增益技术结合,提出了一种鲁棒自适应神经网络跟踪控制算法.该算法不仅能够解决系统中控制方向完全未知问题和可能存在的控制器奇异值问题,而且能够避免传统后推方法的计算膨胀问题,从而大大降低了控制器的复杂性,使之易于工程实现.同时,该算法保证了闭环系统的稳定性,并具有良好的鲁棒性.仿真结果验证了控制器的有效性. 展开更多
关键词 多输入多输出系统 神经网络 动态面控制 NUSSBAUM增益
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毫米波单用户多天线系统的混合预编码设计 被引量:2
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作者 刘文龙 黄雯静 +1 位作者 王本巍 金明录 《电子与信息学报》 EI CSCD 北大核心 2022年第2期620-626,共7页
在毫米波MIMO通信系统中,针对如何提升频谱效率的问题,该文提出一种有效的混合预编码双层交替迭代算法。外层交替使用分解的方法解耦收发端,减少1次计算中所求变量的个数;而内层交替只对接收或者发送端进行,利用模拟域矩阵按列分解,数... 在毫米波MIMO通信系统中,针对如何提升频谱效率的问题,该文提出一种有效的混合预编码双层交替迭代算法。外层交替使用分解的方法解耦收发端,减少1次计算中所求变量的个数;而内层交替只对接收或者发送端进行,利用模拟域矩阵按列分解,数字域矩阵按行分解,将频谱效率表达式化简为一系列子问题。考虑到模拟域矩阵中单个元素对函数的影响和模为1的限制,对列元素采取逐个优化的方案,并对每一次的解加上约束,使解始终处在收敛域内。实验结果表明,所提交替优化解决方案可以获得更好的性能且有着较低的复杂度。 展开更多
关键词 多输入多输出系统 毫米波 混合预编码 双层交替迭代算法
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Output Feedback Stabilization for MIMO Semi-linear Stochastic Systems with Transient Optimisation
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作者 Qi-Chun Zhang Liang Hu John Gow 《International Journal of Automation and computing》 EI CSCD 2020年第1期83-95,共13页
This paper investigates the stabilisation problem and consider transient optimisation for a class of the multi-input-multi-output(MIMO)semi-linear stochastic systems.A control algorithm is presented via an m-block bac... This paper investigates the stabilisation problem and consider transient optimisation for a class of the multi-input-multi-output(MIMO)semi-linear stochastic systems.A control algorithm is presented via an m-block backstepping controller design where the closed-loop system has been stabilized in a probabilistic sense and the transient performance is optimisable by optimised by searching the design parameters under the given criterion.In particular,the transient randomness and the probabilistic decoupling will be investigated as case studies.Note that the presented control algorithm can be potentially extended as a framework based on the various performance criteria.To evaluate the effectiveness of this proposed control framework,a numerical example is given with simulation results.In summary,the key contributions of this paper are stated as follows:1)one block backstepping-based output feedback control design is developed to stabilize the dynamic MIMO semi-linear stochastic systems using a linear estimator;2)the randomness and probabilistic couplings of the system outputs have been minimized based on the optimisation of the design parameters of the controller;3)a control framework with transient performance enhancement of multi-variable semi-linear stochastic systems has been discussed. 展开更多
关键词 multi-input-multi-output(mimo)stochastic systems output feedback stabilisation block backstepping randomness attenuation probabilistic decoupling mutual information
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一类MIMO非线性不确定系统的自适应无源控制
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作者 朱永红 费树岷 《东南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2010年第S1期37-42,共6页
研究了一类含有未知参数的多输入多输出非线性不确定系统的自适应无源控制问题.首先,讨论了当控制输入未知常参数系数矩阵分别为对称正定矩阵和可逆矩阵时这类系统的自适应无源控制器设计方法,继而设计出这2种情况下的自适应无源控制器... 研究了一类含有未知参数的多输入多输出非线性不确定系统的自适应无源控制问题.首先,讨论了当控制输入未知常参数系数矩阵分别为对称正定矩阵和可逆矩阵时这类系统的自适应无源控制器设计方法,继而设计出这2种情况下的自适应无源控制器以及相应的参数自适应律.然后,利用李亚普诺夫方法证明了由原系统和所设计的控制器组成的闭环系统是稳定的,且在一定假设条件下,所设计的控制控制器能够使系统自适应无源.最后,给出了一个仿真算例,仿真结果证明所设计的控制器是有效可行的. 展开更多
关键词 mimo非线性系统 无源控制 自适应控制 参数不确定
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Design of Non-rational MIMO Feedback Systems with Inputs and Outputs Satisfying Certain Bounding Conditions by Using Rational Approximants
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作者 Suchin Arunsawatwong Tadchanon Chuman 《International Journal of Automation and computing》 EI CSCD 2017年第3期360-370,共11页
When a feedback system has components described by non-rational transfer functions, a standard practice in designing such a system is to replace the non-rational functions with rational approximants and then carry out... When a feedback system has components described by non-rational transfer functions, a standard practice in designing such a system is to replace the non-rational functions with rational approximants and then carry out the design with the approximants by means of a method that copes with rational systems. In order to ensure that the design carried out with the approximants still provides satisfactory results for the original system, a criterion of approximation should be explicitly taken into account in the design formulation. This paper derives such a criterion for multi-input multi-output(MIMO) feedback systems whose design objective is to ensure that the absolute values of every error and every controller output components always stay within prescribed bounds whenever the inputs satisfy certain bounding conditions. The obtained criterion generalizes a known result which was derived for single-input single-output(SISO) systems; furthermore, for a given rational approximant matrix, it is expressed as a set of inequalities that can be solved in practice. Finally, a controller for a binary distillation column is designed by using the criterion in conjunction with the method of inequalities. The numerical results clearly demonstrate that the usefulness of the criterion in obtaining a design solution for the original system. 展开更多
关键词 Control design multi-input multi-output mimo feedback systems non-rational systems rational approximants principle of matching method of inequalities
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