共查询到18条相似文献,搜索用时 156 毫秒
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本文从内模控制的结构出发,对钢铁车间加热炉进行控制器设计,通过传统的PID控制器,由内模整定的PID控制器和内模控制器之间的仿真比较,从而看到内模控制和内模整定的PID有着传统PID的优点。而且对大时滞系统有着很好的效果。 相似文献
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针对电液伺服马达控制系统,提出了一种PID内模控制器设计方法。内模控制作为一种先进控制策略,其设计思路是将对象模型与实际对象相并联,控制器逼近模型的动态逆。考虑到内模控制对系统模型精度要求不高的特点,本文降阶大大简化了电液伺服系统的模型。基于此模型所设计的控制器,以传统的PID为基础且使其只有一个可调参数,且该参数直接与系统的动态特性和鲁棒性相关,整定方便,避免了控制器整定的随机性与复杂性。SIMULINK仿真研究表明这种PID内模控制完全可以实现系统的控制要求,能够满足高精度电液伺服马达系统系统的性能要求。 相似文献
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基于内模控制的水轮机调节系统的优化设计 总被引:1,自引:0,他引:1
水轮机调节系统是一类典型的非最小相位系统,为抑制其右半复平面零点所造成的负调,提出一种采用极点镜像映射法的IMC-PID控制和模糊逻辑设定值加权的混合策略。采用内模控制极点映射方法设计PID控制器,能够降低不稳定零点带来的负调;引入的模糊逻辑设定值加权系数可以在线修正控制器的比例增益,从结构上有效抑制负调产生。仿真结果表明,该控制器对水轮机调节系统具有良好的控制效果。 相似文献
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内模控制在串级系统中的应用 总被引:1,自引:0,他引:1
主要讨论了利用内模控制对串级控制系统进行改进,将被控对象转化为含时滞的一阶惯性环节,再将时滞环节进行1/1Pade逼近后,根据内模控制原理,得到了单位反馈PID控制器的参数整定值。仿真实验表明,对于被控对象具有大时滞特性且对象参数变化较大的系统,这一方法能有效改善系统的控制品质,并能适应对象特性的变化,具有较强的鲁棒性。 相似文献
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According to the characteristics of the large time delay, nonlinearity and the great inertia of temperature control system in biomass pyrolysis reactor, a two-degree-of-freedom Smith internal model controller based on fuzzy control is proposed. Firstly, the mathematical model of the temperature control system is established by using the step response method, and then the two-degree-of-freedom Smith internal model controller is designed, and the good tracking per-formance and disturbance suppression performance can be obtained by designing the set value tracking controller and interference rejection capability. Secondly, the fuzzy control algorithm is used to realize the on-line tuning of the control parameters of the two-degree-of-freedom Smith internal model algorithm. The simulation results show that, compared with the traditional internal model control, fuzzy internal model PID control and two-degree-of-freedom Smith internal model control, the algorithm proposed in this paper improves the influence of lag time on the control system, realizes the separation control of set point tracking and anti-jamming performance and the self-tuning of control parameters, and improves the control performance of the system. 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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According to the problem that the selection of traditional PID control parameters is too complicated in evaporator of Organic Rankine Cycle system (ORC), an evaporator PID controller based on BP neural network optimization is designed. Based on the control theory, the model of ORC evaporator is set up. The BP algorithm is used to control the , and parameters of the evaporator PID controller, so that the evaporator temperature can reach the optimal state quickly and steadily. The MATLAB software is used to simulate the traditional PID controller and the BP neural network PID controller. The experimental results show that the , and parameters of the BP neural network PID controller are 0.5677, 0.2970, and 0.1353, respectively. Therefore, the evaporator PID controller based on BP neural network optimization not only satisfies the requirements of the system performance, but also has better control parameters than the traditional PID controller. 相似文献
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高压断路器永磁直线伺服电机操动机构采用直线电机驱动断路器操作杆,带动机构运动,实现分合闸操作,具有良好的快速响应能力及控制性能.该伺服系统采用数字式双闭环控制,内环为电流环,采用PI控制,外环为速度环,采用单神经元自适应PID控制,通过建立直线伺服电机操动机构控制系统仿真模型,详细分析了单神经元自适应PID控制算法以及数学模型,并建立了以输出误差二次方为性能指标的单神经元自适应PID控制器模型.并分别用传统PID与单神经元PID控制算法,对高压断路器触头运动特性控制过程进行了仿真.结果表明,单神经元自适应PID控制器能够较好的实现触头速度的跟踪控制,使其按理想运动特性曲线运动,实现最优操作,该算法是一种较理想、有效的控制方法. 相似文献
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采用IMC-PID增强超临界机组功率控制的鲁棒性 总被引:1,自引:0,他引:1
介绍了一种机组协调控制系统,其在汽轮机主控回路中采用基于闭环辨识模型的IMC-PID方法,采用该方法解决火电机组功率振荡的问题。该方法首先通过闭环回路的设定值阶跃扰动试验,对测取的试验数据进行频率响应特性辨识,估计闭环控制过程中的频率响应矩阵和变换函数矩阵,用最小二乘法计算得出被控对象的模型。然后基于辨识出的模型,通过使用内部模型控制(IMC)方法,设计出汽轮机主控回路的鲁棒 PID 控制器。火力发电厂现场实际应用表明:汽轮机主控采用IMC-PID 控制器后,具有较好的鲁棒性,能够较好地抵御各种电网的外扰及发电过程内扰的影响,避免机组功率振荡。 相似文献
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为了将槽式太阳能集热回路的导热工质出口温度控制在合理范围内,需要研究调节迅速、控制效果良好的集热场出口温度控制系统。以1 MW槽式太阳能热发电实验系统为研究对象,建立了槽式集热回路动态数学模型,并基于模型开发了集热场导热工质出口温度内模控制器,并基于Simulink仿真平台搭建了集热回路工质出口温度PID控制系统和内模控制系统,对比分析了多扰动情况下2种系统的控制效果。结果表明:在太阳辐照、导热工质入口温度和环境温度的共同作用下,相较于PID控制系统,内模控制系统调节时间更短,超调量更小,控制效果更优。 相似文献