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针对过程控制领域的多电动机系统协同控制问题,提出利用传统PID算法与人工神经网络相结合构建PID神经网络,并设计了基于该算法的多电动机协同控制系统。实验结果表明,PID神经网络算法可以有效地解决多电动机驱动系统的协同控制问题,算法收敛速度快,同步误差较小,同时具有较强的抗干扰能力,非常适合实际工程应用。 相似文献
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将RBF神经网络引入PID控制中,建立了一个三层神经网络模型。通过RBF神经网络的在线辨识对PID控制的三个参数进行在线调整,从而改善系统的控制效果。仿真结果表明:基于RBF神经网络的PID控制与传统PID控制相比,具有较强的鲁棒性和自适应能力,控制精度高,效果好,安全可靠。 相似文献
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韩伟 《可编程控制器与工厂自动化(PLC FA)》2005,(5):119-121,128
针对传统的PID控制中参数整定的难题,采用智能控制技术优化PID参数,利用神经网络进行系统商务谈判识,建立对象模型,在此模型基础上,运用遗传算法寻优PID控制参数采用变交叉 概率和变异概率自适应遗传算法寻优得到PID控制参数,与传统的整定结果相比较,遗传算法优化效果更好,最终达到最优的控制效果。 相似文献
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针对BP神经网络-PID控制器盲目选取PID参数初值容易陷入局部最小和给定值大幅变化引起系统性能变坏等问题,提出了一种新型智能数字PID控制器,用积分分离型数字PID取代BP神经网络-PID控制器的传统数字PID,抑制超调,改善系统性能;用继电器自整定法确定PID参数的初值,防止神经网络的局部极小问题。对时变和非时变非线性被控对象,分别用Marlab对新型智能数字PID和传统数字PID的控制效果进行了仿真。结果表明,新型智能数字PID控制器具有更好的控制效果和更好的鲁捧性。将该控制器用于某冶炼厂铅板生产中的铅液温度(坩锅温度)的控制,获得了满意的控制效果。 相似文献
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介绍了基于机器视觉技术的在线钢轨轮廓检测技术受车体振动的影响,提出了通过添加稳定装置的方式消除车体振动对检测的影响。设计了基于陀螺的单轴稳定装置,并对稳定控制回路进行了建模分析,设计了一种基于RBF神经网络在线辨别的单神经元自适应PID控制算法。通过Simulink仿真表明,该算法相比较传统PID控制,能有效地解决实际被控对象模型不准确的问题,具有响应速度快、稳定性高等特点,为设计高精度稳定装置系统提供了理论依据。 相似文献
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循环流化床锅炉的燃烧系统是一个时变、大滞后、多变量强耦合的复杂对象,常规的PID控制效果不佳.为了更好地解决这类对象的控制问题,提出了一种新型的控制方案,基于自适应神经网络模糊推理系统(ANFIS)设计自适应模糊神经网络控制器.将其应用到循环流化床锅炉燃烧系统控制中,利用Matlab对该控制系统进行仿真,并与常规PID... 相似文献
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PID controllers have been widely used in many chemical processes. Because they have only three control parameters, we can easily understand their physical meanings. However, it is difficult to tune their parameters in the case where the control system has uncertainties, for example, modeling errors, system fluctuation, and so on. Therefore, we propose a design scheme of discrete robust PID controllers in this paper. That is, we design a PID controller in connection with the generalized minimum variance control (GMVC) scheme, and present a scheme on how to design a weighting factor included in the GMVC criterion from the viewpoint of robust stability. Furthermore, we investigate the behavior of the proposed control scheme by applying it to an air pressure control system. © 1999 Scripta Technica, Electr Eng Jpn, 128(4): 77–83, 1999 相似文献
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Kenji Takao Toru Yamamoto Takao Hinamoto 《IEEJ Transactions on Electrical and Electronic Engineering》2006,1(4):364-373
This paper describes a new memory‐based proportional, integral, derivative (PID) controller design. These PID parameters are tuned by the IMC‐PID method, which is derived from the relationship between the internal model control (IMC) and PID control. The IMC‐PID has a user‐specified parameter that greatly influences the control performance. The authors have already proposed a system identification scheme based on the memory‐based approach. In this paper, a new controller design scheme is discussed, whose system parameters and the corresponding suitable user‐specified parameter are simultaneously computed. Finally, the behavior of the newly proposed control scheme is examined in a simulation example. © 2006 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. 相似文献
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Self‐tuning control schemes (STC) are useful for systems with unknown or slowly time‐varying parameters. Some single‐input/single‐output PID control schemes based on STCs have been proposed for such systems. However, there are a lot of multivariable systems in real process industries. And these systems often have relatively large time delays. In this paper, a design scheme of self‐tuning PID control system is proposed for multivariable systems with unknown parameters and time delays. The controlled object is equipped with an internal model in order to compensate the time delay and also unstable zeros. Subsequently, a multivariable PID controller is designed for the augmented or compensated system. The PID parameters are calculated recursively based on the relationship between the minimum variance control law and the PID control law. A simulation example is presented to demonstrate the effectiveness of the proposed scheme. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 146(4): 58–64, 2004; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10241 相似文献
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为了解决传统PID控制逆变电源系统无法从根本上解决动态品质和稳态精度的矛盾,提出了一种新的模糊-PID控制方案,该方案将模糊控制与PID控制的优势相结合,并结合DSP控制芯片实时地对PID参数进行调整。仿真结果表明,该方案可以改善动态品质和提高系统稳态精度。 相似文献
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In this paper, a new design scheme of multiloop predictive self‐tuning PID controllers is proposed for multivariable systems. The proposed scheme first uses a static precompensator as an approximately decoupling device in order to roughly reduce the interaction terms of the controlled object. The static matrix precompensator is adjusted by an on‐line estimator. Furthermore, by regarding the approximately decoupled system as a series of single‐input single‐output subsystems, a single‐input single‐output PID controller is designed for each subsystem. The PID parameters are calculated on‐line based on the relationship between the PID control and the generalized predictive control laws. The proposed scheme is numerically evaluated on a simulation example. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(3): 63–71, 2004; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10284 相似文献
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一种智能控制方法在300MW机组主汽温控制系统中的应用研究 总被引:9,自引:0,他引:9
针对某300MW低倍率复合循环锅炉工况变化频繁,主汽温动态特性是变非线性较强的特点,文章采用分级设计控制方案,对一级喷水减温提出一种智能的“阀位”控制方法,对二级喷水减温采用模糊控制结合专家自整定串级PID控制方法,并应用集散控制系统,完成了该系统的设计和实施。 相似文献