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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... 相似文献
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针对永磁同步电动机(Permanent magnet synchronous motor, PMSM)模型参数未知以及电枢电流和负载转矩无法直接测量的问题, 设计一种基于自适应动态规划(Adaptive dynamic programming, ADP)的输出反馈控制方案, 实现PMSM最优速度跟踪控制. 首先, 根据PMSM内部特性确定其数学模型的结构, 构建与原始系统相对应的辅助系统, 引入新的线性二次指标来实现速度最优跟踪调节. 其次, 设计一种嵌入式观测器, 该观测器能够在系统模型未知情况下用可测量数据重构系统全部状态. 此外, 提出一种离线策略的ADP方法逼近最优控制增益的解. 最后, 仿真结果验证所提控制方案在模型参数未知以及电枢电流和负载转矩不可测量的情况下, 实现了精确的速度跟踪性能和良好的瞬态响应, 同时降低了电压的冲击. 相似文献
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This paper presents a backstepping control method for speed sensorless permanent magnet synchronous motor based on slide model observer. First, a comprehensive dynamical model of the permanent magnet synchronous motor(PMSM) in d-q frame and its space-state equation are established. The slide model control method is used to estimate the electromotive force of PMSM under static frame, while the position of rotor and its actual speed are estimated by using phase loop lock(PLL) method. Next,using Lyapunov stability theorem, the asymptotical stability condition of the slide model observer is presented. Furthermore, based on the backstepping control theory, the PMSM rotor speed and current tracking backstepping controllers are designed, because such controllers display excellent speed tracking and anti-disturbance performance. Finally, Matlab simulation results show that the slide model observer can not only estimate the rotor position and speed of the PMSM accurately, but also ensure the asymptotical stability of the system and effective adjustment of rotor speed and current. 相似文献
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定点DSP芯片TMS320C62x具有高速的数据处理能力,该芯片为开发出具有实时分析处理能力的高速系统提供了硬件基础。而开发优化的系统处理软件,是提高DSP系统实时处理数据性能的关键,该文介绍了其软件优化的流程过程,并探讨和介绍了源程序优化的常用方法。 相似文献
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Controller performances are strongly limited by the switching frequency of the converter and the computational capacity of the target board. Therefore, in such a context the design of controllers that provide good performances under possible large sampling period length is necessary. To tackle these limitations, a digital design is described for speed control of permanent magnet synchronous machines. It is based on the interconnection and the damping assignment passivity-based control (IDA-PBC) techniques extensions to the sampled-data context. 相似文献
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功率主回路是交流伺服系统的核心,直接驱动伺服电机工作,由三相整流电路、智能功率模块IPM组成。三相交流电流经功率主回路处理成近似对称的正弦交流电驱动永磁同步电机PMSM工作。良好性能的功率主回路是伺服系统获得好的动态性能和稳态精度的关键。 相似文献
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永磁同步电动机在参数处于特定区域时存在混沌现象,混沌的存在将使电机的性能变差,因此要设法消除其混沌运动.电机中混沌的现有控制方法的控制目标只能为周期点或平衡点,不能满足实际需要.为了解决这个问题,设计了基于非线性反馈的永磁同步电动机中混沌现象的部分解耦控制.该方法以直轴和交轴电压为控制变量,通过电机状态的非线性反馈将直轴和交轴电流方程中的耦合项解耦,同时使得直轴和交轴电流可以跟踪设定值.这种控制方式的结果是使系统具有唯一稳定平衡点,而这个平衡点的位置可以根据实际要求设置为任意点.在任意时刻对处于混沌状态的永磁同步电动机进行部分解耦控制,受控系统将稳定于设定平衡点,从而实现混沌的控制.文中分析了控制参数与系统响应快速性之间的关系,为参数选择提供了指导.仿真结果表明了理论分析的正确性和该控制方法的有效性. 相似文献
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针对于一类具有强耦合、负载不确定性和外界干扰的永磁同步电机(PMSM)系统,本文研究了基于无模型自适应预测控制(MFAPC)问题,并提出了一种新颖的MFAPC方案来实现有外界扰动的PMSM系统的速度追踪任务.所提出控制方案的主要优势在于仅使用了被控系统的输入/输出数据,并且对外界干扰具有较强的鲁棒性.此外,还讨论了闭环系统跟踪误差的收敛性以及有界输入有界输出的稳定性.最后,通过与传统的PI控制方案、原型无模型自适应控制(MFAC)方案的仿真结果相比较,验证了所提出MFAPC方案的有效性和优越性. 相似文献
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Oussama Saadaoui Amor Khlaief Moez Abassi Imen Tlili Abdelkader Chaari Mohamed Boussak 《Asian journal of control》2019,21(3):1318-1327
Sensorless control of a permanent magnetsynchronous motor (PMSM) at low speed remains a challenging task. In this paper, a sensorless vector control of PMSM using a new structure of a sliding mode observer (SMO) is proposed. To remove the mechanical sensors, a full‐order (FO‐SMO) is built to estimate the rotor position and speed of PMSM drives. The FO‐SMO, which replaces a sign function by a sigmoid function, can reduce the chattering phenomenon. In order to overcome time delay, we cancel the low pass filter. This sensorless speed control shows great sensitivity to stator resistance and system noise. To improve the robustness of sensorless vector control, a full‐order SMO technique has been used for stator resistance estimation. A novel stator resistance estimator is incorporated into the sensorless drive to compensate for the effects of stator resistance variation. The validity of the proposed FO‐SMO with a 1.1 kw low‐speed PMSM sensorless vector control is demonstrated by experiments. In this paper, experimental results for FO‐SMO, back‐EMF SMO and MRAS techniques were obtained with fixed point DSP‐based (TMS320F240). 相似文献
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提出了一种双模态自适应小波粒子群(Binary-modal adaptive wavelet particle swarm optimization,BAWPSO)的永磁同步电机(Permanent magnet synchronous motor,PMSM)多参数识别与温度监测方法.为了提高算法动态寻优性能,群体被划分为正向学习和反向学习两种模态;对处于不同模态的粒子分别采用正向学习策略与反向学习策略协同求解,扩大了解的搜索空间;同时对粒子个体极值采用自适应小波算子增强学习以提高收敛精度.永磁同步电机参数辨识结果表明所 提方法能够有效地辨识电机电阻,dq轴电感与转子磁链等参数,且能有效追踪系统参数变化值.在辨识出电机定子绕阻值后,根据金属阻值与温度之间的线性 原理间接计算定转子温度,从而实现永磁同步电机系统温度在线监测. 相似文献
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This paper presents a nonlinear adaptive control (NAC) scheme for the speed regulation of a permanent magnet synchronous motor (PMSM) based on perturbation estimation and feedback linearizing control. All PMSM system’s unknown nonlinearities, parameter uncertainties, and external disturbances including unknown time-varying load torque disturbance, are defined as lumped perturbation terms, which are estimated by designing perturbation observers. The estimates are used to adaptively compensate the real perturbations and achieve adaptive feedback linearizing control of the original nonlinear system. The proposed control scheme does not require accurate system model and full state feedback. Stability of the close-loop system with proposed NAC is investigated via Lyapunov theory, and the effectiveness of proposed NAC scheme is verified through both simulation and experimental studies. Both simulation and experimental results show that the proposed NAC scheme can provide less regulation error in speed tracking, better dynamic performance and robustness against parameter uncertainties and load torque disturbance, compared with conventional vector control and load torque estimated based control. 相似文献
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考虑数字控制系统一个采样周期输入延时和驱动器功率管非线性特性的影响,为增强永磁同步电机(Permanent magnet synchronous motor,PMSM)电流环稳定性和提高电流控制精度,提出一种自适应预测比例-积分-谐振控制(Adaptive predictive proportional-integral-resonant,APPI-RES)策略.该方法能够在电机电阻和电感参数不确定的条件下,预测电流控制误差和未知周期电压扰动,将所得预测量执行反馈控制,实现了对系统输入延时和相电流谐波的有效补偿.最后,通过仿真分析验证了所提控制策略的有效性. 相似文献
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由于永磁同步电机(PMSM)所具有的非线性、强耦合、高时变等特点,传统的经典控制方法对永磁同步电机很难取得很好的控制效果,且鲁棒性较差。这一问题随着鲁棒控制理论的出现,得到了较好的解决。该文提出了一种基于H∞控制理论所设计的鲁棒控制器,能够对控制系统参数的变化和外界扰动进行有效的控制,并较好地抑制其对系统的动态性能的影响。仿真结果表明了本文方法的有效性。 相似文献
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Two model reference adaptive system (MRAS) estimators are developed for identifying the parameters of permanent magnet synchronous motors (PMSM) based on the Lyapunov stability theorem and the Popov stability criterion, respectively. The proposed estimators only need online measurement of currents, voltages, and rotor speed to effectively estimate stator resistance, inductance, and rotor flux-linkage simultaneously. The performance of the estimators is compared and verified through simulations and experiments, which show that the two estimators are simple, have good robustness against parameter variation, and are accurate in parameter tracking. However, the estimator based on the Popov stability criterion, which can overcome parameter variation in a practical system, is superior in terms of response speed and convergence speed since there are both proportional and integral units in the estimator, in contrast to only one integral unit in the estimator based on the Lyapunov stability theorem. In addition, the estimator based on the Popov stability criterion does not need the expertise that is required in designing a Lyapunov function. 相似文献