基于分数阶PID的液压变压器配流盘控制性能

针对液压变压器流量控制问题, 提出采用分数阶PID控制器对配流盘的位置进行精确控制.针对分数阶PID参数整定复杂性问题, 提出了一种混合时频域性能要求的多目标参数整定策略, 结合一种自适应差分进化算法实现了参数的最优整定, 最后通过数值仿真以考察所提方法.时域分析结果表明:该控制策略明显优于传统的PID、模糊及模糊PID控制策略;频域分析结果表明:该伺服系统具有较强的鲁棒性及稳态保持性.验证了基于分数阶PID控制器实现配流盘位置控制的可行性和优越性.     

一阶时滞过程二自由度PID控制器优化法

在前馈加反馈的二自由度控制结构中,反馈PID控制器用于抑制负载扰动,同时使闭环系统有合适的鲁棒稳定性,而前馈控制器是在反馈PID基础上引入比例加权系数和微分滤波系数实现,目的是使设定值响应速度快且超调小.PID参数和前馈系数都是依时间绝对误差积的积分（ITAE）最优而得.针对工业上典型的一阶时滞过程,利用计算机优化和拟合运算,得到控制器的最优设定公式.仿真表明,建议方法对时滞过程是有效的.     

Application of Improved Fuzzy Controller in Networked Control System

1 Introduction Feedback control systems in which the control loops are closed through network are called net- worked control system (NCS). Each component of the system, such as sensor, controller and actuator, exchanges information through the real-time network to complete the control task together [1–3]. Compared with the traditional control systems, the NCS has many advantages such as low cost, reduced wiring, simple installation and maintenance, and high reli- ability. Therefore, the re…     

分数阶PID控制器在自动电压调节系统中的应用

常规的PID控制器在应用于某些复杂系统时,效果可能达不到预期的精度要求,而分数阶多了两个参数,在控制的灵活性以及准确性上都有了较大的改善。主要讨论了分数阶PID控制器在自动电压调节系统中的作用。将分数阶PID控制器与传统的整数阶PID控制器进行了对比,结果表明,分数阶PID控制器具有优于传统PID控制器的性能。     

时滞不稳定过程PID控制器直接设计法

直接在时域上设计时滞不稳定过程比例积分微分（PID）控制器。采取双回路三环节的控制结构,目标是优化两个时域指标-阻尼系数和积分增益。然后,合并三个环节得到设定值加权PID控制器。仿真表明该方法是有效的,具有好的鲁棒稳定性和性能。     

一种基于单神经元的模糊自整定PID控制器

为解决普通的PID控制器设计对系统模型有一定依赖性问题,本文将单神经元网络和模糊逻辑相结合,提出了一种基于单神经元的模糊自整定PID控制器。单神经元控制部分本身还是一个PID控制器,但由于权值可以在线调整,具有较强的自学习和自适应能力,而通过模糊控制器对输出整定,可加速控制过程。将该控制器应用于船舶运动控制仿真中,仿真结果表明,单神经元模糊自整定PID控制器能使船舶更快地达到设定航向,且航向曲线和打舵更加平稳,可明显改善对大纯滞后、大惯性系统的控制效果,在工业控制中有广泛的应用前景。     

一种积分过程PID自整定方法

针对积分加滞后过程,提出了一种设定值加权的PID控制器参数自整定方法,并且针对该方法定义了一种鲁棒性能指标.首先引入一种内部反馈结构, 利用内部反馈结构中的比例控制器将积分过程转换为广义稳定过程,这就使得普通PID控制器设计方法可以在积分过程中得以应用.利用该方法并基于该鲁棒指标设计的控制器一方面克服了传统PID控制方法在控制积分过程时存在的结构上的缺陷,同时又提高了系统的鲁棒性和控制性能,仿真结果也表明基于本方法整定的控制器的控制效果要优于其它方法.     

IMC based robust PID controller tuning for disturbance rejection

It is well-known that the IMC-PID controller tuning gives fast and improved set point response but slow disturbance rejection. A modification has been proposed in IMC-PID tuning rule for the improved disturbance rejection. For the modified IMC-PID tuning rule, a method has been developed to obtain the IMC-PID setting in closed-loop mode without acquiring detailed information of the process. The proposed method is based on the closed-loop step set point experiment using a proportional only controller with gain K_(c0). It is the direct approach to find the PID controller setting similar to classical Ziegler-Nichols closed-loop method. Based on simulations of a wide range of first-order with delay processes, a simple correlation has been derived to obtain the modified IMC-PID controller settings from closed-loop experiment. In this method, controller gain is a function of the overshoot obtained in the closed loop set point experiment. The integral and derivative time is mainly a function of the time to reach the first peak(overshoot). Simulation has been conducted for the broad class of processes and the controllers were tuned to have the same degree of robustness by measuring the maximum sensitivity, Ms, in order to obtain a reasonable comparison. The PID controller settings obtained in the proposed tuning method show better performance and robustness with other two-step tuning methods for the broad class of processes. It has also been applied to temperature control loop in distillation column model. The result has been compared to the open loop tuning method where it gives robust and fast response.     

感应电机单神经元微分积分比例调节器

运用常规的控制方法很难使普通感应电机转子的速度或位置在任何时候自动、连续、准确地复现给定信号的变化规律。讨论了一种采用单神经元ＰＩＤ（比例－积分－微分）调节器来实现感应电机速度跟踪的方法。首先介绍了单神经元ＰＩＤ调节器的基本工作原理,然后构造了采用单神经元ＰＩＤ控制的感应电机调速系统的仿真模型,最后通过计算机仿真,对此种调节器在应电机调速系统中的应用进行了分析,仿真结果难了此调节器可使感应电机具有     

Application of Time Scale to Parameters Tuning of Active Disturbance Rejection Controller for Induction Motor

Active disturbance rejection controller (ADRC) has good performance in induction motor (IM) control system, but controller parameter is difficult to tune. A method of tuning ADRC parameter by time scale is analyzed. The IM time scale is obtained by theor     

Multi-objective optimization based on Genetic Algorithm for PID controller tuning

To get the satisfying performance of a PID controller, this paper presents a novel Pareto-based multi-objective genetic algorithm (MOGA), which can be used to find the appropriate setting of the PID controller by analyzing the pareto optimal surfaces. Rated settings of the controller by two criteria, the error between output and reference signals and control moves, are listed on the pareto surface. Appropriate setting can be chosen under a balance between two criteria for different control purposes. A controller tuning problem for a plant with high order and time delay is chosen as an example. Simulation results show that the method of MOGA is more efficient compared with traditional tuning methods.     

变压器温控器原理及故障分析

本文简要介绍了变压器温控器的功能,以及变压器油面、绕组温度的测量方法,然后分别介绍了BWY-804J（TH）型压力式变压器油面温控器和基于热模拟技术的BWR-04J（TH）型绕组温控器的结构、原理和校验方法,并重点描述了绕组温控器热模拟装置的整定过程,最后,结合文都变500kVⅡ母高抗故障案例,阐述了温控器现场故障的排查方法。     

Intelligent PID controller based on ant system algorithm and fuzzy inference and its application to bionic artificial leg

A designing method of intelligent proportional-integral-derivative(PID) controllers was proposed based on the ant system algorithm and fuzzy inference. This kind of controller is called Fuzzy-ant system PID controller. It consists of an off-line part and an on-line part. In the off-line part, for a given control system with a PID controller,by taking the overshoot, setting time and steady-state error of the system unit step response as the performance indexes and by using the ant system algorithm, a group of optimal PID parameters Kρ, Ti^* and Td^* can be obtained,which are used as the initial values for the on-line tuning of PID parameters. In the on-line part, based on Kρ, Ti^* and Td^* and according to the current system error e and its time derivative, a specific program is written, which is used to optimize and adjust the PID parameters on-line through a fuzzy inference mechanism to ensure that the system response has optimal transient and steady-state performance. This kind of intelligent PID controller can be used to control the motor of the intelligent bionic artificial leg designed by the authors. The result of computer simulation experiment shows that the controller has less overshoot and shorter setting time.     

采用Smith预估补偿的时滞系统PI控制器的设计

针对纯滞后的控制对象特性,提出了基于Smith预估补偿的PI控制器的设计方法。仿真实验表明,此方法整定的PI控制器能有效克服较大纯滞后的影响,性能优于传统的Z—N法和SPAM法。     

船用核动力装置二回路PID神经网络解耦控制研究

直流蒸发器的船用核动力装置是一个非线性、时变及多变量强耦合的被控对象.针对该被控对象设计了改进型PID神经网络控制系统,用于船用核动力装置多变量解耦控制,该神经网络控制器不需要对系统进行辨识,在调整权值的学习过程中使控制系统具有良好的解耦控制性能.仿真结果表明,直流蒸发器压力和汽轮机转速控制之间协调性好,并具有响应速度快、鲁棒性好等特点.     

发电用重型燃气轮机的模糊自适应控制

为了克服传统PI控制器的不足，满足燃气轮机对高品质控制性能的要求，对常规PI控制算法进行分析，找出了常规PI控制器不能获得最佳控制效果的原因．同时通过对模糊自适应控制的原理和燃气轮机运行过程的分析，并结合专家经验得出燃气轮机模糊PI控制规律，设计出了透平转速和燃气轮机排气温度的模糊自适应PI控制器．仿真试验结果证实模糊自适应控制器可以提高燃气轮机的性能，而且实现方便——只要在原系统上增加一个微处理器，完成模糊计算即可．     

一种具有自调整比例环节的模糊PI控制器

提出了一种利用６ 条调整规则自动调节比例环节的自调整模糊控制器．它算法简单,实现容易,通过仿真研究证明该控制器具有较好的动态和稳态性能．     

积分过程PID控制器参数的新型优化整定方法

针对积分时滞过程,结合菌群优化（BSFO）算法和控制系统优化设计策略,提出了一种新的PID控制器参数优化整定方法.通过将PID控制器的参数设置为群体细菌在参数空间的位置,将时间乘以绝对误差的积分（ITAE）作为细菌对环境的适应度函数,并模拟细菌群体觅食的动态行为来实现对PID控制器参数的寻优.实例仿真结果表明,菌群优化算法能够实现对PID控制器参数的有效整定,并在稳定时间、超调量、鲁棒性和抗干扰性等方面具有满意的综合性能.在大量仿真结果的基础上,给出了一个积分时滞对象的PID控制器参数整定经验公式.     

五态控制器初步分析

初步分析了被五态控制器控制的二阶系统的动态和稳态性能，以及如何进行控制器参数的整定。从定量方面分析了五态控制器各个作用力作用的特点，对系统性能的影响，和该控制器对于稳定和不稳定系统的控制过程。     

大时滞积分过程的改进Smith预估控制器

针对大时滞积分过程提出了一种改进Smith预估PI控制算法,该算法引入两个具有明显物理意义的可调参数,一个参数用于调节闭环伺服系统的跟踪速度,另一个用于改变闭环系统对扰动的控制品质。同时,提出了基于这两个参数的PI控制器参数整定方法,在模型失配情况下,对参数的稳定域进行估计,两个仿真实例验证了算法的有效性。