共查询到20条相似文献,搜索用时 31 毫秒
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智能厂房温湿度控制系统 总被引:4,自引:0,他引:4
首先分析了厂房温湿度控制与一般建筑物空调系统的区别,指出现在流行的空调控制方法不适合厂房温湿度控制;接着提出一种智能温度控制方法,它不需要确定系统的数学模型,用专控制的方法,在不同控制阶段分别采用开关控制,模糊控制和智能PID控制;最后介绍了实行结果。 相似文献
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This article presents a novel three-loop control system, which supplements control structures known from the literature as model following control (MFC). The major advantage of the proposed system is its high robustness to process parameter variations; it is much higher than that offered by single-loop or two-loop control systems. Features of the new structure are revealed by a theoretical analysis that has been carried out from the viewpoint of requirements for a force/pose controller of a Stäubli RX60 manipulator. This article shows how the proposed control structure responds to such strong process parameter variations and makes a comparison to results yielded by single-loop control structures. 相似文献
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模型跟踪广义预测鲁棒自适应控制器 总被引:4,自引:1,他引:4
本文采用滤波CARMA模型,基于内模原理,提出了一种新的广义预测鲁棒自适应控制器,并分析了闭环系统性能,在新的控制器中,引入适当的前馈作用,使得跟踪和调节问题解耦,利用部分状态跟踪、模型参考以及极点配置方法解决跟踪问题,利用多步预测滚动优化方法解决调节问题;适当选择滤波器可以保证对平稳随机扰动有满意的响应,减少可调参数对闭环系统响应的影响,增强系统对未建模动态的鲁棒性,仿真结果表明:该控制器对确定性和非平稳随机扰动具有不变性,对系统时延和阶次变化具有鲁棒性,适用于非最小相位和开环不稳定系统。 相似文献
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一种专家智能控制器的仿真研究 总被引:1,自引:0,他引:1
该文提出一种专家智能控制器(简称为EI控制器).该控制器的参数可基于专家知识和过程参数的变化实时进行调整。仿真结果表明对于工业过程中的大纯滞后、非线性、变参数特性能获得较为满意的调节效果。 相似文献
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An approach to the synthesis of control laws stabilizing motion and force in contact tasks, based on the exponential stability of the closed-loop control system, is described. When using the synthesized control laws, simultaneous stabilization of both motion and force is achieved with a preset quality of the transient responses. The task is solved in a most general form, taking into account the constraints on robot control, its position and the force of interaction of the robot and the environment, and the external perturbations and inaccuracies of the measuring sensors, when the environment dynamics is being described by nonlinear second-order differential equation, and the robot dynamics includes the third-order equations of the robot actuators dynamics. 相似文献
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对于具有较大时滞,非线性和时变性特点的打样机对象(它是印染行业中的一种小型设备),常规PID控制方法往往难以达到良好的控制效果.本文将专家控制器与常规PID控制器相结合,提出了一种智能控制器结构.试验表明,与常规PID控制器相比,该控制器的控制精度有了明显的提高. 相似文献
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Jorge Diaz-Salgado Jesus Alvarez Alexander SchaumJaime A. Moreno 《Journal of Process Control》2012,22(1):303-320
The robust feedforward (FF) output-feedback (OF) control problem of (possibly open-loop unstable) continuous exothermic jacketed reactors with isotonic kinetics with respect to reactant concentration is considered. The volume, temperature, and concentration must be regulated by manipulating the feed, exit and coolant flowrates on the basis of volume and temperature measurements. The problem is addressed as an interlaced controller-observer design within a constructive control framework. The result is a quasi linear-decentralized (qLD) FF-OF dynamic controller which: (i) recovers (up to observer convergence) the behavior of a robust nonlinear FF-SF controller, (ii) has closed-loop stability conditions coupled with conventional-like tuning guidelines, and (iii) constitutes an add-on to the PI control scheme commonly employed in industrial reactors. The approach is tested with an open-loop unstable reactor example through simulations. 相似文献
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Juan Garrido Francisco Vázquez Fernando Morilla 《International journal of systems science》2016,47(5):1054-1072
This paper presents a new methodology to design multivariable proportional-integral-derivative (PID) controllers based on decoupling control. The method is presented for general n × n processes. In the design procedure, an ideal decoupling control with integral action is designed to minimise interactions. It depends on the desired open-loop processes that are specified according to realisability conditions and desired closed-loop performance specifications. These realisability conditions are stated and three common cases to define the open-loop processes are studied and proposed. Then, controller elements are approximated to PID structure. From a practical point of view, the wind-up problem is also considered and a new anti-wind-up scheme for multivariable PID controller is proposed. Comparisons with other works demonstrate the effectiveness of the methodology through the use of several simulation examples and an experimental lab process. 相似文献
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本文提出一种新型的分散式自适应鲁棒机器人控制方案。它主要解决以下诸方面的问题:1)减少在线计算量;2)通过设置一个非线性观测器来及时修正模型信息,以适应负载及其他因素变化的需要,进而有效地减少所需控制值(尤其当系统处于平稳工作状态时,效果更加明显),相应地,也就减少了系统工作时的动能损耗。这一点对[1]中提出的机器人分散式变结构控制算法有较大改进;3)对系统的不确定性和扰动作用具有鲁棒性。 相似文献
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Robust containment control in a leader–follower network of uncertain Euler–Lagrange systems 下载免费PDF全文
A distributed controller is developed that yields cooperative containment control of a network of autonomous dynamical systems. The networked agents are modeled with uncertain nonlinear Euler–Lagrange dynamics affected by an unknown time‐varying exogenous disturbance. The developed continuous controller is robust to input disturbances and uncertain dynamics such that asymptotic convergence of the follower agents' states to the dynamic convex hull formed by the leaders' time‐varying states is achieved. Simulation results are provided to demonstrate the effectiveness of the developed controller. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
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Xian-Ming Zhang Qing-Long Han Xiaohua Ge Derui Ding Lei Ding Dong Yue Chen Peng 《IEEE/CAA Journal of Automatica Sinica》2020,7(1):1-17
Networked control systems are spatially distributed systems in which the communication between sensors, actuators,and controllers occurs through a shared band-limited digital communication network. Several advantages of the network architectures include reduced system wiring, plug and play devices,increased system agility, and ease of system diagnosis and maintenance. Consequently, networked control is the current trend for industrial automation and has ever-increasing applications in a wide range of areas, such as smart grids, manufacturing systems,process control, automobiles, automated highway systems, and unmanned aerial vehicles. The modelling, analysis, and control of networked control systems have received considerable attention in the last two decades. The ‘control over networks’ is one of the key research directions for networked control systems. This paper aims at presenting a survey of trends and techniques in networked control systems from the perspective of ‘control over networks’, providing a snapshot of five control issues: sampled-data control, quantization control, networked control, event-triggered control, and security control. Some challenging issues are suggested to direct the future research. 相似文献
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This paper describes the multivariable characteristics of industrial coal-fired boilers and associated mathematical models, such as combustion model, a water drum level model and a superheated steam model. The purpose of the paper is to design multivariable control systems using multivariable system frequency domain design theory and the Smith-predictor technique. A specific application shows how to design a model-based distributed multivariable control system for coal-fired boilers in a small-scale power station. 相似文献
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线性模糊PID控制器的设计与分析 总被引:2,自引:0,他引:2
买买提热依木·阿布力孜 《计算机应用与软件》2006,23(4):137-138,144
基于模糊语言控制规则描述的模糊控制,已成功地用于工业过程控制并具有广泛的应用前景。用模糊线性PID控制器的数学等效式在MATLAB Simulink和Floulib工具帮助下用Mamdani方法对一阶控制对象进行二维PID模糊控制仿真实验,理论分析与实验证明采用模棚线性PID控制方法比传统的PID控制方法在应用上简便、清晰,具有一定的实用价值。 相似文献
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State-feedback model predictive control (MPC) of constrained discrete-time periodic affine systems is considered. The periodic systems’ states and inputs are subject to periodically time-dependent, hard, polyhedral constraints. Disturbances are additive, bounded and subject to periodically time-dependent bounds. The objective is to design MPC laws that robustly enforce constraint satisfaction in a manner that is least-restrictive, i.e., have the largest possible domain. The proposed design method is demonstrated on a building climate control example. The proposed method is directly applicable to time-invariant MPC. 相似文献
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V. Feliu J. A. Somolinos C. Cerrada J. A. Cerrada 《Journal of Intelligent and Robotic Systems》1997,20(2-4):349-373
A new scheme is presented in this paper to control single-link flexiblemanipulators. The objective is to control the tip position of the flexiblearm in the presence of joint friction and payload changes. The controlscheme is based on two nested loops: an inner feedback loop to control themotor position which is robust to joint friction, and an outer loop tocontrol the tip position which is robust to payload changes. This outer loopis composed of a feedforward term and a feedback term. This results in asimple control law that needs minimal computing effort and, thus, can beused for real time control of flexible arms. The proposed method is generalin the sense that it can be applied to very different arm structures anddiverse sensor systems configurations. Results corresponding to twodifferent arm setups are presented. 相似文献