Genetic algorithm and particle swarm optimization tuned fuzzy PID controller on direct torque control of dual star induction motor

This study presents analysis, control and comparison of three hybrid approaches for the direct torque control (DTC) of the dual star induction motor (DSIM) drive. Its objective consists of combining three different heuristic optimization techniques including PID-PSO, Fuzzy-PSO and GA-PSO to improve the DSIM speed controlled loop behavior. The GA and PSO algorithms are developed and implemented into MATLAB. As a result, fuzzy-PSO is the most appropriate scheme. The main performance of fuzzy-PSO is reducing high torque ripples, improving rise time and avoiding disturbances that affect the drive performance.

Mode switching control strategy of dual motors coupled driving on electric vehicles

Based on analyzing the structure and working principle on electric vehicles （EVs） with dual motors coupled by planetarY gears, the control strategy of mode switching was proposed. The power interruption problem on EVs with automatic mechanical transmission （AMT） shifting was resolved. Based on the speed-torque characteristics of the planetary gears and the principle of the auxiliary motor＇ s zero speed braking, control features of mode switching were introduced. The mode shifting between the main motor mode and dual motors coupled driving were studied. Matlab/Simulink was adopted as a platform to develop the simulation model of EVs with dual motors drive system and 3 gears AMT. Simulation results demonstrated that the power interruption of dual motors drive system was solved during mode switching. The power requirements of EVs were satisfied, too.

Speed Regulation Method Using Genetic Algorithm for Dual Three-phase Permanent Magnet Synchronous Motors

Dual three-phase Permanent Magnet Synchronous Motor(DTP-PMSM)is a nonlinear,strongly coupled,high-order multivariable system.In today’s application scenarios,it is difficult for traditional PI controllers to meet the requirements of fast response,high accuracy and good robustness.In order to improve the performance of DTP-PMSM speed regulation system,a control strategy of PI controller based on genetic algorithm is proposed.Firstly,the basic mathematical model of DTP-PMSM is established,and the PI parameters of DTP-PMSM speed regulation system are optimized by genetic algorithm,and the modeling and simulation experiments of DTP-PMSM control system are carried out by MATLAB/SIMULINK.The simulation results show that,compared with the traditional PI control,the proposed algorithm significantly improves the performance of the control system,and the speed output overshoot of the GA-PI speed control system is smaller.The anti-interference ability is stronger,and the torque and double three-phase current output fluctuations are smaller.

Open Winding-permanent Magnet/Magnet Reluctance Hybrid Rotor Double Stator Synchronous Motor SVPWM Control

Coal mine conveyor belt and other low-speed large torque system,the torque density and torque stability of the motor requirements are higher,permanent magnet/magnet reluctance hybrid rotor double stator synchronous motor(PM/MRHRDSSM)is just adapted to this requirement,however,the traditional close winding single inverter vector control system control PM/MRHRDSSM provides large torque ripple,high speed fluctuation and large total harmonic distortion(THD)of the current,difficult to be used in actual production and life,this paper proposes a large torque open winding-permanent magnet/magnet reluctance hybrid rotor double stator synchronous motor(OW-PM/MRHRDSSM)based on SVPWM dual inverter control strategy,and analysis of open winding double inverter structure,and its voltage vector mathematical model,using the existing two-level inverter as a basis,the bilateral inverter separately discussed its role and control method,as well as the decomposition method of synthetic voltage vector and the inverter device in the small sector on-time,the end of this paper through simulation to compare the traditional close winding single inverter vector control system control PM/MRHRDSSM and the large torque OW-PM/MRHRDSSM based on SVPWM dual inverter control strategy to prove the effectiveness of the proposed method in reducing torque ripple,speed fluctuation and THD of current during motor operation.

Simplified Model Predictive Current Control for Dual Three-phase PMSM with Low Computation Burden and Switching Frequency

Finite-control-set model predictive control(FCSMPC)has advantages of multi-objective optimization and easy implementation.To reduce the computational burden and switching frequency,this article proposed a simplified MPC for dual three-phase permanent magnet synchronous motor(DTPPMSM).The novelty of this method is the decomposition of prediction function and the switching optimization algorithm.Based on the decomposition of prediction function,the current increment vector is obtained,which is employed to select the optimal voltage vector and calculate the duty cycle.Then,the computation burden can be reduced and the current tracking performance can be maintained.Additionally,the switching optimization algorithm was proposed to optimize the voltage vector action sequence,which results in lower switching frequency.Hence,this control strategy can not only reduce the computation burden and switching frequency,but also maintain the steady-state and dynamic performance.The simulation and experimental results are presented to verify the feasibility of the proposed strategy.

Transient Analysis and Control Strategies for a Quad-lnverter Multiphase Multilevel Motor Drive in Faulty Conditions

In this paper, post-fault-tolerant control strategies for quad-inverter multiphase-multilevel induction motor drives are investigated. More specifically, four standard two-level three-phase VSIs （voltage source inverters） supplying the open-end windings of a dual three-phase induction motor is considered, quadrupling the power capability of a single VSI with given voltage and current ratings. In healthy conditions, the control algorithm is able to generate multi-level voltage waveforms, equivalent to the ones of a three-level inverter and to share the total motor power among the four dc sources in each switching period. This sharing capability is investigated under post-fault operating conditions, when one VSI must be completely insulated due to a severe failure on it. In this case, the conversion power unit can operate with a reduced power rating by a proper modulation of the remaining three VSIs. The whole ac motor drive has been numerically implemented, and the effectiveness of the proposed control strategies under healthy and post-fault operating conditions have been proved.

刚性联接双电机系统功率平衡控制策略

针对刚性联接双电机系统因参数摄动和负载变化导致的系统输出功率不均衡问题,基于转矩闭环矢量控制系统,提出了一种自抗扰模型预测(ADRC-MPCC)转矩交叉耦合功率平衡控制策略。首先,建立刚性联接双电机系统的统一数学模型,基于该模型分析了功率不平衡产生的原因;其次,通过确定合适的转矩反馈补偿系数,提高了系统中双电机的同步性能;最后,设计自抗扰控制器对转速环、磁链环和转矩环的扰动进行估计和补偿,并通过简化模型预测控制方法对逆变器开关状态进行选择,减少了控制器的运算时间。仿真与实验结果表明,提出的控制策略实现了参数摄动和负载扰动情况下刚性联接双电机系统的输出功率平衡,验证了功率平衡控制策略的有效性。

乘用车双电机冗余电动助力转向系统研究

为了提高电动助力转向系统的安全性以及可靠性,基于乘用车提出一种双电机冗余电动助力转向技术,采用转向执行双助力电机,可以从硬件上实现冗余,避免任意单电机发生故障时导致转向系统的失效,不仅可以满足转向系统对于轻便型、助力跟随性的要求,还可以减轻单个助力电机的负载提高电机的使用寿命。针对提出的问题,介绍了对双电机阻力转向系统整体结构及工作原理,并对其关键零部件进行分析论述。搭建双电机冗余系统仿真模型,双电机电流分配采用“一主一辅”的控制方式,并进行方向盘多种工况仿真验证。针对助力转向出现抖动问题,结合“扫频试验”,设计输出转矩超前滞后补偿方式进行相位校正补偿。通过实车试验验证了该算法的准确性和有效性。实验结果表明双冗余电动助力转向系统极大提高了转向力矩的稳定性,抑制其扰动性,有较好的助力效果,极大提高系统的可靠性和安全性。

混合转子永磁电机双风道冷却系统设计

混合转子永磁电机具有高功率密度的优势,但也导致电机散热空间和散热能力不足等问题。为此,根据其特有的转子结构提出一种双风道冷却系统,并采用计算流体力学(Computational fluid dynamics,CFD)的方法对电机温度场进行验证。首先,根据电机损耗和尺寸设计一个适合双风道的轴流风扇。其次,对不同进、出风口的结构参数进行仿真,对比和分析仿真结果,选出冷却性能较好的参数组合。最后对单风道和该参数组合下的双风道进行数值模拟,仿真结果表明,使用双风道冷却结构后电机散热能力显著提升。

全数控螺旋锥齿轮铣齿机双电机消隙技术研究

作为加工螺旋锥齿轮的专用设备,螺旋锥齿轮铣齿机在数控加工过程中由于齿隙的存在易出现卡死问题,引致冲击与震荡等现象,降低齿轮加工精度。对比消隙技术,构建基于PMAC的螺旋锥齿轮铣齿机传动系统双电机消隙方法,应用IPC+PMAC运动控制器的双电机驱动应用系统对该消隙方法进行试验,结果表明此方法能有效消除齿隙,提升整个数控系统的稳定性,利用双电机伺服消隙方法具有一定的可靠性。

基于混合粒子群的电动汽车转矩分配策略研究

针对双电机驱动系统电动汽车前、后轴电机转矩分配问题,利用Simulink与AVL-Cruise软件建立了双电机电动汽车整车模型;基于车辆构型特点建立双电机驱动系统效率数学模型,以双电机驱动系统的整体效率最高为优化目标,在前、后轴电机特性约束范围内通过混合粒子群算法,对转矩分配系数进行迭代优化研究。仿真结果表明,在单个工况点和连续运行工况下,混合粒子群算法的转矩分配策略能够实现合理的转矩分配满足车辆行驶的需求,在NEDC、CLTC-P、WLTC三种循环工况下,采用该策略的电动汽车续驶里程延长了11.71%、9.06%、9.46%,双电机电动汽车的经济性明显提升。

基于双驱动模型的雷达伺服控制系统设计

雷达伺服系统中天线转台需要较低的转速和较大的转矩,因此使用齿轮传动系统,但齿轮传动过程中齿隙的存在会降低伺服系统的性能。为满足雷达天线转台高性能的需求,设计并制作了基于双驱动模型的雷达伺服控制系统。首先对整个双驱系统的整体方案进行设计,阐述双电机消隙的原理,并对硬件和软件进行设计。最终通过硬件平台的搭建测试,双电机驱动伺服系统比单电机驱动伺服系统的性能有明显的提升。

基于滑模控制的双电机嵌入式同步系统

采用DSP TMS320F28335和FPGA XC4VLX60作为核心芯片,搭建了刚性轴连接的双电机速度同步控制的嵌入式系统。FPGA负责旋转变压器信号的解码和相电流信号的采集,并防止逆变器的上、下桥臂短路,DSP负责控制算法的实现,提高了系统的实时性和可靠性。基于矢量控制方法实现了永磁同步电机的运动控制,速度环采用滑模控制器,提高系统的鲁棒性,电流环采用交叉耦合控制器,保证两个电机的输出力一致。通过阶跃响应实验,当速度指令为500 r/min时,经过0.08 s电机反馈速度稳定在500 r/min,双电机的电流差异由启动时的0.75 A迅速稳定在0.29 A,验证了控制算法和嵌入式系统的有效性。

基于双扰动观测器的永磁同步电机双惯量系统无模型递归终端滑模控制

为了提高永磁同步电机双惯量系统在不确定性扰动影响下的控制性能,提出一种基于双扰动观测器的无模型递归终端滑模控制策略。首先,建立存在不确定性扰动的永磁同步电机双惯量系统模型,并结合无模型控制与递归终端滑模控制设计无模型递归终端滑模控制器,使系统状态直接从滑模面开始运动,缩短了状态误差的收敛时间,有效抑制抖振。其次,通过构造扩张状态观测器观测负载速度并反馈到改进型扩展扰动滑模观测器中,构成双扰动观测器。同时,双扰动观测器精确估计总扰动信号并前馈补偿到所设计的控制器,进一步提高系统稳态性能和抗扰动能力。最后,通过仿真和实验验证得出,所提出的控制方案相较于比例积分控制和改进型无模型滑模控制方法更具有优越性和可行性。

智能化电驱盖板拧紧装配系统设计与实现

在汽车整车生产制造过程中,电驱作为电动汽车的核心部件是标准化程度最高的装配部件,如何快速准确地完成电驱装配是整车装配质量重要的工艺环节。为进一步提升螺栓的拧紧效率及容错性能,本研究分析电驱盖板拧紧方案,并对拧紧顺序进行优化,设计基于PLC的机器人视觉协同工作的双工位加工模式,给出盖板拧紧系统软硬件设计方案并进行了现场测试。该系统自动化程度高、人机界面友好,相对于常规系统进一步提高了电驱装配质量,提升了生产效率。

基于进风优化的混合动力双电机油冷热管理系统研究

针对某款采用双电机油冷器冷却的串并联式混合动力汽车,设计一套动力热管理系统。综合三维和一维仿真方法建立热管理仿真模型进行进风量和油温仿真分析,并根据仿真结果进行优化设计。

基于矢量控制技术的伺服驱动系统

针对伺服驱动系统精度低、动态响应慢、稳定性差等问题,对双绕组永磁同步电机的矢量控制技术进行了深入的研究。优化和改进控制策略、系统硬件和软件程序。提出新的解决方案,设计伺服驱动系统。搭建试验平台,对系统进行功能和性能测试。实验结果表明:系统响应速度快、稳定性强,电机的控制精度和抗干扰能力也得到了明显提高,满足系统设计需求。

基于反步法的双电机同步联动伺服系统自适应鲁棒控制

针对具有未知传动齿隙的伺服系统,采用双电机同步联动消除齿隙,分别施加偏置力矩,在系统参数未知、存在未建模动态及外界扰动的情况下,设计了基于反步法的自适应鲁棒控制器。该控制器包括基于模型参数在线估计的自适应补偿、稳定反馈和鲁棒控制三部分。通过逐步选择控制系统Lyapunov函数,使得系统闭环控制系统信号有界,且跟踪误差在任意期望的精度内。理论证明和仿真分析验证了算法的有效性。

基于变偏置力矩的双电机系统消隙控制方法研究

针对双电机驱动控制系统,提出一种基于电机电流的变偏置力矩消隙控制方法,根据电机的负载电流值及设定的转换函数w,动态输出偏置力矩以实现消隙控制与共同驱动控制之间的转换。同时,给出了转换函数中电流设定值的选取方法,该选取方法简便可行,为工程实际应用提供了理论依据。建立双电机驱动系统仿真模型对控制方法的有效性进行验证,仿真结果表明,采用变偏置力矩控制的双电机系统能够消除传动间隙;通过合理选取转换函数中的电流设定值,可降低静态下的电机间偏置力矩,从而降低系统能耗;偏置力矩的动态输出提高了双电机驱动系统的力矩输出能力。

单逆变器驱动双永磁同步电机断相容错控制策略

为保障单逆变器控制双表贴式永磁同步电机(surface-mounted permanent magnet synchronous motor,SPMSM)在发生断相故障后系统的安全可靠运行,该文提出一种单逆变器表贴式双永磁同步电机系统绕组断相故障容错控制策略。首先根据断相后的电机电压电流关系,设计一种用于单逆变器双永磁同步电机的绕组断相故障容错拓扑。在此基础上,为保证双永磁同步电机系统稳定运行,利用端口电压调整策略,满足双永磁同步电机的拓扑约束。仿真和实验结果表明,所提容错控制策略可确保单逆变器控制双电机系统在某一电机发生断相故障时仍然稳定运行。