共查询到20条相似文献,搜索用时 31 毫秒
1.
霍延军 《微电子学与计算机》2012,29(10):194-197
PID控制在工业生产中应用非常广泛.以直流电机模型为被控对象,提出了基于量子粒子群算法的PID参数自动整定方法.应用经典的Ziegler-Nichols方法整定PID参数,被控对象性超调大往往难以满足要求.粒子群算法是通过模拟鸟群觅食过程中的迁徙和群聚行为而提出的一种基于群体智能的全局随机搜索算法.将量子粒子群算法用于优化PID参数,并与Z-N法整定的PID控制器性能进行对比.仿真结果发现,与Z-N法相比,基于粒子群算法优化的PID控制器,系统超调明显减小.除QPSO-PID(ITSE)对应的系统具有较长调节时间外,虽然应用不同优化目标优化后的PID参数不同,控制对象的响应性能却非常相似. 相似文献
2.
Fractional calculus has been a topic of great interest for the last few decades. The applications of fractional calculus can be found in the area of viscoelastic and chaotic systems, whose dynamics is expressed in the form of fractional differential equations. The ongoing research work is based on the design of 1-Degree of Freedom (1-DOF) and 2-Degrees of Freedom (2-DOF) Fractional Order PID (FOPID) controllers for a Magnetic levitation (Maglev) plant and the performance has been compared with that of 1-DOF and 2-DOF Integer Order PID (IOPID) controllers in both simulation and real time. The Degree of Freedom (DOF) represents the number of feed-forward control loops in a closed loop system. A 2-DOF controller configuration comprises of a serial compensator and a feed-forward compensator in a closed loop structure. An FOPID controller has a structure similar to that of a conventional IOPID controller, except that its derivative and integral orders are fractional numbers. The design of such a controller requires the determination of five parameters: Kp, Ki, Kd, α and β, where α and β are the derivative and integral orders of the FOPID controller. The controller design problem has been framed as an optimization problem, in which the cost function is formulated from the characteristic equation of the closed loop system at dominant poles that are identified from the given performance specifications. The closed loop response shows that the proposed2-DOF FOPID controller exhibits superior response and robustness with respect to its integer order counterpart. 相似文献
3.
Fractional calculus has been gaining more and more popularity in control engineering in numerous fields, including mechatronic applications. One of the most common applications in all mechatronic domains is the control of DC motors. Several control algorithms have been proposed for such motors, ranging from traditional PID algorithms, to the more sophisticated advanced methods, including fractional order controllers. Nevertheless, very little information regarding the implementation problems of such fractional algorithms exists today. The paper proposes a simple approach for designing a fractional order PI controller for controlling the speed of a DC motor. The resulting controller is implemented on an FPGA target and its performance is compared to other possible benchmarks. The experimental results show the efficiency of the designed fractional order PI controller. Beside the initial DC motor, two other different DC motors are also used in the experiments to demonstrate the robustness of the controller. 相似文献
4.
5.
6.
Swapnil Khubalkar Amit Chopade Anjali Junghare Mohan Aware Shantanu Das 《Circuits, Systems, and Signal Processing》2016,35(6):2189-2211
The aim of paper is to employ digital fractional order proportional integral derivative (FO-PID) controller for speed control of buck converter fed DC motor. Optimal pole-zero approximation method in discrete form is proposed for realization of digital fractional order controller. The stand-alone controller is implemented on embedded platform using digital signal processor TMS320F28027. The five tuning parameters of controller enhance the performance of control scheme. For tuning of the controller parameters, dynamic particle swarm optimization technique is employed. The proposed control scheme is simulated on MATLAB and verified by experimental results. Performance comparison shows better speed control of separately excited DC motor with the realized digital FO-PID controller than that of the integer order PID controller. 相似文献
7.
为了满足地基大口径望远镜精密稳像系统的需求,对大口径快摆镜(FSM)的控制方法进行了研究。为了解决三促动器FSM的运动解耦为系统辨识带来的困难,通过解析法和系统辨识法相结合建立了FSM的传递函数模型。依据该模型,设计了PID控制器与模型预测控制器(MPC),采用仿真和实验两种方式比较了两种控制器的效果。仿真结果表明,在受到阶跃扰动后,MPC控制器的恢复速度是PID控制器的45倍。在50 Hz正弦信号下,由于FSM的大惯量特点,PID控制器有严重的时滞,而MPC控制器能以1.224×10^-6″的误差稳定跟随。在噪声抑制方面,对实时加入10%幅值噪声的随机信号,MPC控制器的噪声抑制效果是PID控制器的13.3倍。实验结果表明,MPC控制器能以0.430″的误差稳定跟随50 Hz正弦信号,其跟踪精度是PID控制器的3.212倍,采用MPC控制器的快摆镜能满足快摆镜高带宽和高精度的需求。 相似文献
8.
直流电机是将直流电能转换成机械能或将机械能转换成直流电能的旋转电机。PID(比例-积分-微分)控制器,由比例单元P、积分单元I和微分单元D组成,通过Kp,Ki和Kd 3个参数的设定,主要适用于基本线性和动态特性不随时间变化的系统。PID控制器作为最早实用化的控制器已有70多年的历史,产品已在工程实际中得到了广泛的应用。PID控制器由于简单易懂,在使用中不需精确的系统模型等先决条件,因而成为应用最为广泛的控制器。文章针对常规直流电动机PID控制系统的参数整定存在一定复杂性的问题,分析了PID控制系统的结构和原理,根据参数的选择,建立了数学模型。对直流电动机模型进行仿真分析,并对PID控制的仿真结果进行对比分析,通过仿真结果发现PID控制系统具有良好的静、动态性能和鲁棒性。 相似文献
9.
10.
11.
Moutinho M.N. da Costa C.T. Barra W. Barreiros J.A.L. 《Latin America Transactions, IEEE (Revista IEEE America Latina)》2009,7(2):141-150
The experimental results obtained in the design and implementation of an decoupled digital speed and voltage controller for a micro-energy system are reported in this work. The studied system is formed by a 9 Kw DC motor driving a 10 KVA synchronous machine. There are two control loops in the proposed controller: the speed control (speed governor) and the control of the stator's voltage (automatic voltage regulator). Each control loop was designed using linear control techniques and fuzzy control techniques. Tests on the system show the performance of the proposed controllers. 相似文献
12.
两轮载人自平衡车控制系统是一种典型的类倒立摆动态平衡控制系统,为降低成本,提高系统操控性能,该文利用新型ARM微处理器STM32F373为控制核心,结合惯性传感器MPU6050,进行了平衡车控制方案设计。该文提出了电机的直接转矩控制法,并利用改进后的显性互补滤波算法得到车体倾斜角度的实时最优值,形成了以角度环、角速度环及电流环所构成的三闭环串级比例-积分-微分(PID)控制方式,实现了车辆的自平衡行驶。与传统使用电压开环控制及速度反馈控制的平衡车相比,该文设计的平衡车具有性价比高、响应速度快、控制平稳等优点。 相似文献
13.
Field orientation control (FOC) of induction machines has permitted fast transient response by decoupled torque and flux control. However, field orientation detuning caused by parameter variations is a major difficulty for indirect FOC methods. Traditional probability density function (PID) controllers have trouble meeting a wide range of speed tracking performance even when proper field orientation is achieved. PID controller performance is severely degraded when detuning occurs. This paper presents a fuzzy logic design approach that can meet the speed tracking requirements even when detuning occurs. Computer simulations and experimental results obtained via a general-purpose digital signal processor (DSP) system are presented 相似文献
14.
15.
基于精确线性化理论,设计了他励直流电动机非线性转速控制器。从他励直流电动机数学模型出发,对系统的两个平衡点进行了研究。在此基础上,运用输入输出线性化方法,通过选择不同的输出函数,设计了两种非线性转速控制器,并研究了控制器内动态的稳定性。仿真结果表明,直接选择电机转速为输出函数设计的控制器,无法将系统控制到期望平衡点,选择转速和电枢电流线性组合为输出函数设计的非线性控制器,可以使系统稳定到期望的平衡点,实现电动机转速精确控制,且具有很好的控制精度、动态性能和抗干扰能力 相似文献
16.
17.
文中采用TMS320F2812定点数字信号处理器作为直流电机调速系统的控制芯片,提高了系统的控制精度并简化了控制系统的硬件结构。同时采用抗积分饱和PID算法对电机的转速实施双闭环控制,使用C语言与汇编语言进行混合编程,从而使电机调速系统的稳定性和动态性得到提高。 相似文献
18.
本文介绍了基于开放式计算机控制直流调速系统教学实验平台,指导学生在传统PID调节器中加入模糊控制策略的教学实践.笔者分析了Matlab/SimuIink软件环境下参数在线自整定模糊PID控制器的设计过程,并对比分析了不同控制策略实验结果.开发的实验装置新功能可以有效提升实验教学水平. 相似文献
19.
针对高压断路器三相永磁无刷直流电机机构,研究了不同控制策略下电机操动机构的运动特性.考虑高压断路器的分、合闸操作过程,建立了永磁无刷直流电机操动机构运动控制系统的仿真模型,采用数字式双闲环控制,内环为电流环,采用PI控制,外环为速度环,基于传统PID控制器、单神经元PID控制两种不同控制策略控制.通过对伺服控制系统的仿真分析得到了电机操动机构速度跟踪控制特性.结果表明,单神经元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,是一种较理想、有效的控制方法. 相似文献