无刷直流电机调速系统的IMC-PID抗饱和控制

针对无刷直流电流电机双闭环调速系统转速调节器存在的非线性饱和特性,提出一种IMC-PID抗饱和控制方案。首先根据内模控制原理设计出转速环和电流环的IMC-PID控制器,然后引入可行性参考输入的概念,设计出基于条件技术的转速环IMC-PID抗饱和控制器,最后为验证IMC-PID抗饱和控制器的可行性,将该控制器应用于无刷直流电机双闭环调速系统中。仿真结果表明:该控制器不仅具有的良好的抗干扰性和鲁棒性,而且改善了系统的动态性能,有效抑制了饱和现象的影响。     

Analytical design of PID controller cascaded with a lead-lag filter for time-delay processes

An analytical method for the design of a proportional-integral-derivative (PID) controller cascaded with a second-order lead-lag filter is proposed for various types of time-delay process. The proposed design method is based on the IMC-PID method to obtain a desired, closed-loop response. The process dead time is approximated by using the appropriate Pade expansion to convert the ideal feedback controller to the proposed PID·filter structure with little loss of accuracy. The resulting PID·filter controller efficiently compensates for the dominant process poles and zeros and significantly improves the closed-loop performance. The simulation results demonstrate the superior performance of the proposed PID·filter controller over the conventional PID controllers. A guideline for the closed-loop time constant, λ, is also suggested for the FOPDT and SOPDT models.     

盾构近距离施工的IMC-PID控制模型研究

针对盾构近距离施工中变形控制的特点,以变形控制为目标,采用系统控制论的思想和方法,提出一种基于内模控制的IMC-PID参数整定方法的盾构施工控制方法。分析研究盾构施工控制中正面土压力和盾尾注浆两个关键参数对紧邻隧道变形影响的全过程控制模型APLOC。仿真结果显示,此控制模型具有很好的稳定性和鲁棒性。实际控制效果明显,相邻隧道变形控制在5mm之内。     

Dynamic matrix control and generalized predictive control,comparison study with IMC-PID

Two of control techniques of the Model Predictive Control (MPC) methodology, which are Dynamic Matrix Control (DMC) and Generalized Predictive Control (GPC), with IMC-PID are disputed in this paper. The main characteristics of these important control techniques, widely used in industry, are presented. The optimum solution of the predicted control inputs and outputs are obtained by minimizing a cost function that contains the squared errors between the reference trajectory and predictions output on the prediction horizon. These controllers are applied on a Process Control Module (PCM), a system with pure time delay, and tested in the light of disturbance rejection and tracking performance for the constant and variable trajectory.     

苯乙烯装置先进控制技术的应用与研究

介绍了IMC-PID控制、多变量预测控制及分程控制在苯乙烯装置中的应用,叙述了先进控制的原理、优点,对影响控制器效果的因数、数学模型及算法进行了研究分析,并提出了优化改进的方法。     

A multivariable IMC-PID method for non-square large time delay systems using NPSO algorithm

Multiple time delays and strong interactions among different loops are the main problems in the design of multivariable controller for non-square systems. In this paper, the concept of effective open-loop transfer function (EOTF) is extended to non-square systems. By applying the internal model control (IMC) method, the controllers with equivalent models are designed. For practical applications, the NPSO algorithm is used to obtain the parameters of the incremental PID with first-order lag filter. This new method does not only avoid the complex computation caused by the procedure of decoupling first and then designing controllers but also employs the advantages of IMC-PID's suitable for large time delay systems and strong robustness. Simulation is carried out to demonstrate the effectiveness of the proposed method; also significant performance improvement has been achieved with the proposed method compared with other methods.     

两种IMC-PID整定方法的比较

主要针对一阶时滞过程和二阶时滞过程设计的内模控制器,分别用麦克劳林展开法和分子分母相同幂次系数相等法为相应的IMC-PID控制器进行了参数整定。分别选取模型进行了仿真,结果表明:分子分母对应幂次相等法控制效果略优于麦克劳林展开法,两种方法都能取得很好的控制效果。     

Multi-loop PI controller design based on the direct synthesis for interacting multi-time delay processes

In this article, a new analytical method based on the direct synthesis approach is proposed for the design of a multi-loop proportional-integral (PI) controller. The proposed design method is aimed at achieving the desired closed-loop response for multiple-input, multiple-output (MIMO) processes with multiple time delays. The ideal multi-loop controller is firstly designed in terms of the relative gain and desired closed-loop transfer function. Then, the standard multi-loop PI controller is obtained by approximating the ideal multi-loop controller using the Maclaurin series expansion. The simulation study demonstrates the effectiveness of the proposed method for the design of multi-loop PI controllers. The multi-loop PI controller designed by the proposed method shows a fast, well-balanced, and robust response with the minimum integral absolute error (IAE).     

基于内模PID控制器的时延网络控制系统的保稳定性设计①

网络控制系统中存在的随机时延会导致系统的性能变差甚至不稳定。通过对随机时延的分析,建立了一个基于内模PID控制原理的网络控制系统模型,并以工业过程控制中经常用到的二阶对象为控制对象,完成了网络环境下的内模PID控制器的设计。仿真对比表明,该控制器对系统性能进行了补偿,保证了系统具有良好的稳定性能。     

IMC—PID在水厂出水浊度控制中的仿真研究

城市供水出水浊度过程是一个大惯性、大时滞、非线性、时变以及随机干扰多的难控对象,采用常规PID控制很难取得理想的控制效果.IMC-PID控制器的参数都以唯一和直接的方式与模型参数相关.并且只有一个在线可调整的参数--低通滤波器时间常数,其大小决定了系统的性能指标和鲁棒性.仿真研究表明,对于常用的一阶惯性加时滞工业对象模型,采用IMC-PID控制器可以取得良好的控制效果,当实际过程与模型不匹配时通过调整滤波器时间常数仍然可以达到比较好的控制效果.