人工神经网络在伺服最优鲁棒控制中的应用

提出了一种基于神经网络的伺服最优鲁棒控制，介绍了利用神经网络的学习特性对被控对象的模型不确定性进行补偿和控制。仿真结果表明，所控制器优于一般伺服控制的性能，并有较强的鲁棒性。     

一个基于神经网络模型的鲁棒自适应控制算法

对于具有不确定因素的离散非线性动态系统,通过校正神经网络预报器的输出,运用加权预报控制性能指标和网络辨识器模型局部线性化的思想,提出了一个间接鲁棒自适应神经网络控制算法,仿真研究证实了该控制策略的鲁棒性和有效性.     

基于神经网络的动态系统逆模型辨识及闭环控制

本文提出一种动态线性或非线性系统的神经网络逆模型辨识结构，并引出两种ＰＩＤ与神经网络逆模型相结合的自适应控制方案，神经网络模型采用基于Ｕ－Ｄ分解卡尔曼滤波学习算法（ＵＤＫ）的动态前向多层网、仿真结果表明了所述辨识方案的有效性及特点 。     

基于神经网络的鲁棒自适应控制

考虑摩擦及外界干扰的情况下，针对具有不确定性参数的机器人系统，提出一种基于神经网络动态补偿的鲁棒自适应控制策略，采用神经网络在线补偿控制器以克服系统的外部扰动，未建模动力学部分等非参数不定性带来的影响，从而提高了系统的动态性能和稳态精度，并对闭环系统稳定性进行了证明，仿真结果表明，所提方法具有良好的跟踪性能和较强的鲁棒性。     

非线性系统的神经网络鲁棒自适应跟踪控制

针对一类具有未知非线性函数和未知虚拟系数非线性函数的二阶非线性系统,提出了一种神经网络鲁棒自适应输出跟踪控制方法.用李雅普诺夫稳定性分析方法证明了本文的神经网络自适应控制器能够使受控系统内的所有信号均为有界.选择的神经网络权值调整规律可以防止自适应控制中的参数漂移.     

基于递归神经网络的一类非线性无模型系统的自适应控制

给出了基于递归神经网络非线性无模型的自适应控制方案，它具有灵活、简单、方法等特点，可以处理传统方法和非线性无模型系统自适应控制方法不能控制或控制效果不理想的非线性对象。理论分析和仿真结果证明了这种方法的优越性。     

一种基于模糊神经网络的双足机器人混杂控制

针对双足机器人控制问题,提出了一种基于模糊神经网络的混杂控制方法.该种方法将模糊神经网络融入了逆系统和H∞控制方法中,一方面将模糊神经网络的构造误差看作系统的干扰,利用H∞控制对干扰进行抑制.另一方面利用模糊神经网络对系统模型进行逼近,为逆系统的构建和H∞控制率的设计提供了有效的系统信息.本文分析了闭环系统的稳定性问题,证明了在采用本文提出的模糊神经网络和自适应算法后可以抑制L2增益.     

Robust Adaptive Dead Zone Technology for Fault-Tolerant Control of Robot Manipulators Using Neural Networks

In this paper, a multi-layered feed-forward neural network is trained on-line by robust adaptive dead zone scheme to identify simulated faults occurring in the robot system and reconfigure the control law to prevent the tracking performance from deteriorating in the presence of system uncertainty. Consider the fact that system uncertainty can not be known a priori, the proposed robust adaptive dead zone scheme can estimate the upper bound of system uncertainty on line to ensure convergence of the training algorithm, in turn the stability of the control system. A discrete-time robust weight-tuning algorithm using the adaptive dead zone scheme is presented with a complete convergence proof. The effectiveness of the proposed methodology has been shown by simulations for a two-link robot manipulator.     

基于神经网络的反馈式自适应逆控制系统

由于在建立非线性逆模型时采用带有复杂非线性函数的滤波器来完成,而由此带来了结构复杂、运算量大等缺点,在实际运用上受到了很多限制.为此,采用较为简单的线性逆控制方式与单层神经网络相结合构成逆控制结构,其良好的非线性特性使系统具有逼近任何非线性模型的能力,且结构简单实用.应用举例表明这种方法在运算量和控制性能上均取得了非常好的效果.     

基于神经网络非线性系统辨识和控制的研究

本文提出了由静态的前馈网络和稳定的滤波器构成的非线性系统的辨识模型，在神经网络固有的逼近误差存在的情况下，从理论上讨论了神经网络应用于辨识控制过程中系统的稳定性问题，最后研究了在非线性系统的轨迹跟踪过程中增加滑动控制来偿神经网络的逼近误差，从而提高系统跟踪性能。     

基于神经网络的一类非线性系统自适应H∞控制

基于神经网络提出一种自适应Ｈ∞控制方法。控制器由等效控制器和Ｈ∞控制器两部分组成,用神经网络逼近未知非线性函数,Ｈ∞控制器用于减弱外部及神经网络逼近误差对跟踪误差的影响。所设计的控制器不仅保证了闭环控制系统的稳定性,而且使外部干扰及神经网络逼近误差对跟踪误差的影响减小到预定的性能指标。     

Optimal Process Control Using Neural Networks

Infinite time optimal controllers have been designed for a dispersion type tubular reactor model by using the framework of adaptive critic optimal control design. For the reactor control problem, which is governed by two coupled nonlinear partial differential equations, an optimal controller synthesis is presented through two sets of neural networks. One set of neural networks captures the relationship between the states and the control, whereas the other set of networks captures the relationship between the states and the costates. This innovative approach embeds the solutions to the optimal control problem for a large number of initial conditions in the domain of interest. Although the main aim of this paper is to solve a process control problem, the methodology presented here can be viewed as a practical computational tool for many problems associated with nonlinear distributed parameter systems. Numerical results demonstrate the viability of the proposed method.     

Control of a Robotic Wheelchair Using Recurrent Networks

This paper describes an adaptive neural control system for governing the movements of a robotic wheelchair. It presents a new model of recurrent neural network based on a RBF architecture and combining in its architecture local recurrence and synaptic connections with FIR filters. This model is used in two different control architectures to command the movements of a robotic wheelchair. The training equations and the stability conditions of the control system are obtained. Practical tests show that the results achieved using the proposed method are better than those obtained using PID controllers or other recurrent neural networks models     

Robust Adaptive Control of Robots Using Neural Network: Global Stability

A desired compensation adaptive law‐based neural network (DCAL‐NN) controller is proposed for the robust position control of rigid‐link robots. The NN is used to approximate a highly nonlinear function. The controller can guarantee the global asymptotic stability of tracking errors and boundedness of NN weights. In addition, the NN weights here are tuned on‐line, with no offline learning phase required. When compared with standard adaptive robot controllers, we do not require linearity in the parameters, or lengthy and tedious preliminary analysis to determine a regression matrix. The controller can be regarded as a universal reusable controller because the same controller can be applied to any type of rigid robots without any modifications. A comparative simulation study with different robust and adaptive controllers is included.     

基于神经网络的非线性自适应控制*

本文对非线性自适应控制的一个新领域－基于神经网络的非线性自适应控制（以下简称ＮＮＢＮＡＣ）的研究进展进行了综述，讨论了这一领域中存在的几个重要问题，然后指出了与这些问题相关的未来的研究方向。     

时滞系统的神经网络辨识与控制算法

针对时滞系统、应用神经网络的非线性逼近能力,采用神经网络实现内模控制中被控对象的正模型及内模控制器,用Lyapunov稳定性定理证明神经网络控制系统的稳定性。仿真结果说明神经网络内模控制方案的优越性。     

基于神经元网和带死区的最小二乘算法的非线性离散时间系统的自适应控制

针对非线性离散时间系统,提出了一种用带死区的最小二乘算法去调节神经网参数的算法,同其他算法相比,这种算法具有非常高的收敛速度.对于这种自适应控制算法,证明了闭环系统的所有信号是有界的,跟踪误差收敛到以零为原点的球中.     

Robust Control of a Two-Link Flexible Manipulator with Quasi-Static Deflection Compensation Using Neural Networks

A robust control method of a two-link flexible manipulator with neural networks based quasi-static distortion compensation is proposed and experimentally investigated. The dynamics equation of the flexible manipulator is divided into a slow subsystem and a fast subsystem based on the assumed mode method and singular perturbation theory. A decomposition based robust controller is proposed with respect to the slow subsystem, and H ^∞ control is applied to the fast subsystem. The overall closed-loop control is determined by the composite algorithm that combines the two control laws. Furthermore, a neural network compensation scheme is also integrated into the control system to compensate for quasi-static deflection. The proposed control method has been implemented on a two-link flexible manipulator for precise end-tip tracking control. Experimental results are presented in this paper along with concluding remarks.     

基于BP神经网络的自适应控制

本文利用ＢＰ神经网络对被控对象进行在线辨识和控制。为实现自适应控制，本文对ｓｐｅｃｉａｌｉｓｅｄ ｌｅａｒｎｉｎｇ算法进行了改进，在此基础上，本文还提出了一种基于ＢＰ网络的自适应ＰＩＤ控制器。