基于EKF和SMC的永磁同步电机无传感器矢量控制

采用扩展卡尔曼滤波(EKF)算法估计永磁同步电机(PMSM)转速和转子位置,构成转速、电流双闭环的无传感器矢量控制系统.针对扩展卡尔曼滤波为有偏估计、对模型误差鲁棒性差等问题,提出了基于指数趋近律的滑模转速控制器.为提高转速环抗负载转矩扰动能力,设计负载转矩观测器并将观测结果引入到电流控制器的输入端,作为速度控制器前馈补偿的控制输入.仿真实验结果表明,与传统采用PI(proportional-integral)转速控制器的系统相比,文中所提控制策略具有转速跟踪误差小、响应快、无超调、抗负载扰动能力强等优点.     

基于LPV观测器的永磁同步电机反推控制

针对永磁同步电机(Permanent Magnet Synchronous Motor,PMSM)无速度传感器转速跟踪控制精度问题,提出了一种基于线性变参数(Lineeo Parameteo Varying,LPV)转速观测器的永磁同步电机反推控制方法。该方法首先根据PMSM的LPV模型,推导出电机的凸胞形顶点方程;然后利用Lyapunov稳定性理论,获得了基于线性矩阵不等式(Lineeo Matrix Inequality,LMI)的观测器设计方法,构造了PMSM的LPV观测器,实现对电机转速及定子交轴电流的重构;最后运用反推控制策略,设计电机闭环系统控制器,实现对电机转速的高精度跟踪控制。仿真结果表明,该方法相较与传统PI矢量控制,跟踪精度高、响应快、抗负载扰动强,对实现PMSM的无速度传感器高精度转速跟踪控制具有重要意义。     

永磁同步电机的模型预测与反演控制

为提高永磁同步电机的控制精度、负载工作能力和响应速度,在d-q坐标系下分析了电机的电气特性与机械特性,建立了连续时间系统的状态空间模型.在离散控制系统中,利用状态转移模型预测电机状态,并根据估计的状态偏差运用广义逆矩阵理论反演控制指令.从系统状态可控性的角度,提出了一种基于模型预测与反演,转角转速联合控制的方法.并依据系统对扰动的响应机理,反演控制补偿量.在考虑摩擦力、负载及外部扰动的情况下,与PID控制方法进行了仿真对比,并对比了参数偏差的情况.结果 表明所设计的控制器具有较好的响应速度、控制精度和对干扰与电机参数的鲁棒性.     

永磁同步直线电机的分数阶超螺旋滑模控制

为了提高永磁同步直线电机的跟踪性能,增强系统的鲁棒性,本文提出了分数阶超螺旋滑模控制策略.首先,针对外部扰动以及系统的未知状态设计广义超螺旋观测器,其能够精确估计永磁同步直线电机的速度和外部扰动.其次,将分数阶理论和终端滑模控制理论相结合,提出有限时间收敛的分数阶超螺旋滑模控制器,以实现永磁同步直线电机的跟踪控制.最后,通过仿真对比验证所提方案的有效性.     

带扩张状态观测器的PMSM双滑模控制北大核心CSCD

立足于提高永磁同步电机调速系统的可靠性和鲁棒性,在矢量控制基础上提出了带扩张状态观测器(ESO)的双滑模控制方法。设计了改进型扩展滑模观测器的无速度传感器策略,利用锁相环提取转子位置和转速信息,节约了成本,提高了系统可靠性;设计了新型变指数趋近律滑模速度控制器取代PI控制器,通过扩张状态观测器对扰动项进行补偿得到期望的q轴电流,提高了系统的快速性和鲁棒性。仿真结果验证了控制方案的有效性与正确性。     

基于自适应负载观测器的PMSM滑模控制

根据永磁同步电机的矢量控制模型,设计一个滑模转速控制器,并设计一个自适应观测器估计负载转矩扰动值,进而对扰动进行在线补偿。滑模控制器与传统PID控制相比具有超调量小、响应快的优点．负载观测器的补偿提高了系统的性能。MATLAB仿真结果证明该设计方法的有效性。     

容错逆变器驱动的PMSM双环预测控制的研究

为了提高三相四开关容错逆变器驱动的永磁同步电机调速系统的性能,提出了调速系统双闭环预测控制策略。在转速环中设计了带扰动补偿的模型预测控制方法,通过离散扰动观测器估计负载扰动并进行前馈补偿,与模型预测速度控制相结合得到[q]轴电流环的期望给定值。在电流环中设计了基于离散滑模的有限控制集模型预测控制方法。通过与传统PI、FCS-MPC方法进行仿真对比,验证了该方法在空载启动、给定转速突变以及存在负载扰动、参数变化时,可使容错逆变器驱动的永磁同步电机调速系统具有更好的动态响应能力和鲁棒性。     

交流伺服电机速度与位置环的一体化鲁棒控制

提出一种交流伺服系统的离散域复合控制方案,可实现在未知负载条件下的准确位置控制。基于永磁同步电机伺服系统中位置与速度环组成的数学模型,以电机转角位置作为系统的测量反馈信号,设计一个降阶线性扩展状态观测器对电机转速（未量测）和未知负载扰动加以估计,并用于反馈控制和扰动补偿。采用TMS320F2812DSP在一台实际的永磁同步电机上进行了实验测试,结果表明伺服系统能在未知负载情况下实现平稳和准确的目标位置跟踪,且对负载和参数差异具有较好的鲁棒性。这种控制方案可方便地应用于相关的伺服系统。     

基于扩展状态观测器的交流伺服电机精确速度控制

提出一种交流电机伺服系统的转速控制方案,在未知负载条件下可实现速度的准确调节。基于永磁同步电机伺服系统中位置与速度环组成的数学模型,以电机转角位置作为系统的测量反馈信号,设计一个扩展状态观测器对系统转速(未量测)和未知负载扰动加以估计,并用于控制和补偿。从理论上分析了速度控制系统的渐近稳定性。最后进行了MATLAB仿真和基于TMS320F2812DSP的实验测试,结果表明伺服系统能在扰动情况下实现平稳和准确的目标转速跟踪。     

基于ESO的永磁同步电机伺服系统快速终端滑模控制

为了优化永磁同步电机(PMSM)伺服系统的控制性能, 本文提出了一种基于非奇异快速终端滑模控制(NFTSMC)和扩张状态观测器(ESO)的复合控制策略. 论文首先建立了考虑集总扰动的永磁同步电机数学模型, 根据所定义的非奇异终端滑模面和趋近律, 设计了位置跟踪控制器, 所设计的控制器采用非级联结构替代了传统的位置环和速度环控制器, 并通过李亚普诺夫定理证明了稳定性和有限时间内收敛. 为了进一步提高系统的抗扰动性能, 本文引入了扩张状态观测器来估计系统扰动并将其应用于前馈补偿. 然后, 文章对系统整体进行了稳定性证明. 最后,文章完成了基于所设计控制器的仿真和实验验证. 结果表明, 该控制器具有良好的位置跟踪性能且收敛速度快, 对外部干扰具有强鲁棒性.     

Nonlinear predictive controller for a permanent magnet synchronous motor drive

A nonlinear predictive controller (NPC) for a permanent magnet synchronous motor (PMSM) is proposed in this paper. Its objective is high performance tracking of the rotor speed trajectory while maintaining the d-axis component of the armature current at zero. The load torque and the mismatched parameters are considered to be unknown perturbations. To ensure robustness against these perturbations, a disturbance observer is designed using a new gain function, and integrated into the control law. The combination of the nonlinear predictive controller and the disturbance observer works as a nonlinear controller. The overall closed-loop system is proved to be globally asymptotically stable depending on the design parameters. The validity of the proposed controller was tested by simulations. Satisfactory results were obtained with respect to the tracking of the speed trajectory and disturbance rejection.     

A robust composite nonlinear control scheme for servomotor speed regulation

A parameterised design of robust composite nonlinear controller is proposed for typical second-order servo systems subject to unknown constant disturbance and control input saturation. The control law consists of a linear feedback part for achieving fast response, a nonlinear feedback part for suppressing the overshoot, and a disturbance-compensation mechanism for erasing the steady-state error. An extended state observer is adopted to estimate the unknown disturbance. The closed-loop stability is analysed theoretically. The control scheme is applied to the speed regulation of permanent magnet synchronous motor, and numerical simulations are carried out. The results confirm that the proposed control scheme can achieve fast, smooth, and accurate speed regulation, and has a certain degree of robustness with respect to the amplitude of disturbances and the perturbations of system parameters.     

Model predictive position control of permanent magnet synchronous motor servo system with sliding mode observer

In order to improve the control accuracy and robustness of permanent magnet synchronous motor (PMSM) servo system, a new non-cascade predictive control strategy is proposed to replace the traditional three-closed-loop servo control in this paper. The design process is as follows. First, the state variables and a discrete-time state space model of motor are defined; meanwhile, the lumped term of disturbance is included in the motor model. Second, the optimal cost function is chosen to design the model predictive controller (MPC). Then, according to the uncertain parameters and external disturbance, the sliding mode observer (SMO) is introduced to estimate and compensate the disturbance. Finally, the comparative experimental result proves that the proposed predictive control method not only has less regulation parameters but also has high position tracking accuracy and strong anti-interference ability even under different conditions.     

基于模糊扰动观测器的PMSM积分滑模控制研究

为了克服传统永磁同步电机(Permanent magnet synchronous motor,PMSM)的滑模控制增益大容易产生抖振的问题,提出基于模糊观测器的PMSM积分滑模控制策略。采用新型趋近律设计积分滑模控制器取代传统的滑模控制器,提高系统的动态响应性能。结合模糊控制与自适应控制的特点,设计模糊扰动观测器,能够迅速有效地观测系统内部参数变化和外部扰动,并对积分滑模速度控制器进行前馈补偿,削弱系统抖振的同时提高了系统的鲁棒性。通过李雅普诺夫理论证明了该控制系统的稳定性。仿真及实验结果验证了该方法具有较强的鲁棒性,可以实现良好的跟踪效果并且无抖动。     

无位置传感器的永磁同步电动机反演控制

设计了一种基于无位置传感器的永磁同步电动机(PMSM)反演控制器.该控制器包括基于定子电流检测的速度观测器与反演速度控制器.速度观测器代替位置传感器实现转速的在线估计;反演控制器的设计确保速度控制系统具有快速的转速跟踪与转矩响应.通过设计全局Lyapunov函数保证了控制系统的稳定性.仿真和试验结果表明:基于速度观测器...     

Speed Tracking Control of Permanent Magnet Synchronous Motor by a Novel Two-step Internal Model Control Approach

The control problem of permanent magnet (PM) synchronous motor has attracted extensive attentions in both control society and industrial applications. Much recently, a local speed tracking and nonlinear disturbance rejection problem of PM synchronous motor was investigated by nonlinear internal model design. In this paper, we propose a novel two-step controller design strategy to achieve speed tracking and nonlinear disturbance rejection of PM synchronous motor with wide speed range, which combines the advantages of classical double-loop control and nonlinear internal model control. It is worth mentioning that the proposed two-step controller design strategy can not only guarantee exact speed tracking with wide speed range, but also reject small nonlinear external disturbances in the load torque, generated by a so-called nonlinear exosystem. Simulation results demonstrate the effectiveness of our design.