共查询到20条相似文献,搜索用时 140 毫秒
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贺焕林李红军温盛军王东云张谦 《控制工程》2016,(9):1330-1334
基于CGT(Command Generator Tracker)理论的模型输出跟踪控制可实现对低阶理想参考模型的性能跟踪。然而,当被控对象会随环境变化而改变时,控制系统的跟踪性能会有所下降。为了进一步提高控制系统的适应性,提出了一种基于CGT的自适应模型输出跟踪控制方法。该方法通过在线辨识系统参数,自动调整前馈输入,从而提高控制系统的跟踪性能。随后,针对网络化铝板温度系统应用了提出的基于CGT的自适应模型输出跟随控制器。实验验证了控制方法的有效性,实现了对铝板温度的网络化跟踪控制。 相似文献
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为提高使用低阶参考模型的MRACS的抗扰能力,提出同时采用被控对象和参考模型状态构成混合自适应控制器的方法,数字仿表真明设计方法是正确的,控制效果良好。 相似文献
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本文提出了一种新的限制输出个数减少随机多变量自适应控制中辨识参数的方法,并给出了减少辨识参数的极点配置自适应算法。虽然采用n个输入1个输出的减少辨识参数的模型来设计控制器,但所提出的控制器能够保证被控系统的几个输出跟踪参考输入信号,仿真结果表明,所提出的方法是成功的。 相似文献
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大滞后多变量计算机控制系统的设计与研究 总被引:1,自引:0,他引:1
提出了一种多变量大滞后计算机控制系统的设计方法.介绍了系统的设计思想,数字控制器的设计方法及在多输入多输出大滞后系统中的应用实现.以具有滞后的二输入二输出多变量被控对象(两种形式)为例,说明了系统设计方法及步骤,并进行仿真实验.实验结果表明,该数字控制器能够使其控制质量满足性能要求,具有良好的控制效果. 相似文献
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基于极点配置的多模型自适应控制 总被引:2,自引:0,他引:2
基于极点配置技术对单输入单输出离散时间被控对象提出多模型自适应控制算法,在保证稳定性的前提下,算法对被控对象参数跳变时能进行有效的控制,并提高了系统的瞬态响应。 相似文献
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工业生产过程中,被控系统越来越复杂,需要控制的变量通常不止一对,而且相互耦合,较成熟的线性多变量控制理论与设计方法已难以满足实际的多变量生产过程控制。本文针对多变量强耦合带有延迟环节的被控系统,研究了一种简化的串联前馈补偿解耦控制器设计方法。根据被控对象的辨识模型,设计串联前馈补偿解耦器,使系统解耦成单输入单输出模型,进而分别对解耦后输入输出模型设计PID控制器,整定PID控制器参数。仿真结果表明该方法具有较好的解耦能力和鲁棒性,算法简单,易于实现。 相似文献
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Hafedh Abid Mohamed Chtourou Ahmed Toumi 《International Journal of Control, Automation and Systems》2009,7(6):982-991
In this paper we are interested in robust adaptive fuzzy control of nonlinear SISO systems in the presence of parametric uncertainties.
The plant model structure is represented by the Takagi-Sugeno (T-S) type fuzzy system. An indirect adaptive fuzzy controller
based on model reference control scheme is proposed to provide asymptotic tracking of reference signal. The controller parameters
are computed at each time. The plant state tracks asymptotically the state of the reference model for any bounded reference
input signal. Inverted pendulum and mass spring damper are used to check the performance of the proposed controller. 相似文献
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Adaptive control of rigid body satellite 总被引:1,自引:1,他引:0
Thawar T. Arif 《国际自动化与计算杂志》2008,5(3):296-306
The minimal controller synthesis (MCS) is an extension of the hyperstable model reference adaptive control algorithm. The aim of minimal controller synthesis is to achieve excellent closed-loop control despite the presence of plant parameter variations, external disturbances, dynamic coupling within the plant and plant nonlinearities. The minimal controller synthesis algorithm was successfully applied to the problem of decentralized adaptive schemes. The decentralized minimal controller synthesis adaptive control strategy for controlling the attitude of a rigid body satellite is adopted in this paper. A model reference adaptive control strategy which uses one single three-axis slew is proposed for the purpose of controlling the attitude of a rigid body satellite. The simulation results are excellent and show that the controlled system is robust against disturbances. 相似文献
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Nikolaos A. Sofianos 《International journal of systems science》2013,44(8):1546-1565
A new indirect adaptive switching fuzzy control method for fuzzy dynamical systems, based on Takagi–Sugeno (T–S) multiple models is proposed in this article. Motivated by the fact that indirect adaptive control techniques suffer from poor transient response, especially when the initialisation of the estimation model is highly inaccurate and the region of uncertainty for the plant parameters is very large, we present a fuzzy control method that utilises the advantages of multiple models strategy. The dynamical system is expressed using the T–S method in order to cope with the nonlinearities. T–S adaptive multiple models of the system to be controlled are constructed using different initial estimations for the parameters while one feedback linearisation controller corresponds to each model according to a specified reference model. The controller to be applied is determined at every time instant by the model which best approximates the plant using a switching rule with a suitable performance index. Lyapunov stability theory is used in order to obtain the adaptive law for the multiple models parameters, ensuring the asymptotic stability of the system while a modification in this law keeps the control input away from singularities. Also, by introducing the next best controller logic, we avoid possible infeasibilities in the control signal. Simulation results are presented, indicating the effectiveness and the advantages of the proposed method. 相似文献
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An adaptive model-following speed controller for induction motor drives is proposed and implemented. This adaptive controller is easy to implement since, for the controlled plant, only the output signal is fed back. In order to choose a reference model with the desired drive dynamic behavior, a two-degree-of-freedom (2-DOF) controller is designed, using a systematic procedure based on the prescribed drive specifications. The reference model of the adaptive system is chosen as the transfer function of the controlled drive system by the 2-DOF controller in the nominal case. An adaptation signal is augmented to let the prescribed specifications be maintained under a wide range of operating conditions 相似文献
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大纯滞后系统的自适应补偿控制 总被引:3,自引:0,他引:3
针对工业过程中普遍存在的纯滞后对象的控制问题,提出了一种带误差补偿环节的模型参考自适应控制方法。仿真结果表明,这种自适应控制器对于一类大纯滞后系统的控制具有比较好的控制效果,且结构简单,有一定的鲁棒性。 相似文献
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This paper studies design and implementation of an enhanced multivariable adaptive control scheme for an uncertain nonlinear process exposed to actuator faults. For adaptive fault compensation, a model reference adaptive control (MRAC) strategy is utilized as main controller. A new adaptation algorithm making possible to improve transient performance of adaptive control is integrated to the controller. With the help of further modifications, some restrictive conditions on multivariable adaptive design are relaxed so that the system requires less plant information. The resulting controller has a simpler structure than the other matrix factorization based controllers. At the final stage of design, a robust adaptive control scheme is obtained with consideration of practical implementation problems such as sensor noises, external disturbances and unmodeled system dynamics. It is proved that the controller guarantees closed-loop signal boundedness and asymptotic output tracking. Real-time experiment results acquired from quadruple tank benchmark system are presented in order to exhibit the effectiveness of the proposed scheme. 相似文献
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研究系统存在不确定性的大柔性飞行器的姿态跟踪控制问题.针对高阶大柔性飞行器模型,使用平衡实现方法对其降阶,并通过奇异值对比分析系统降阶前后特性.基于降阶模型,设计LQR-PI控制器作为基线控制器.考虑不确定性,利用李雅普诺夫稳定性理论设计模型参考自适应控制器,并对比两种方法的控制效果.仿真结果显示,所提方案对包含不确定性的系统具有较好的控制效果,能使系统完成期望的姿态跟踪目标. 相似文献
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