基于全局快速终端滑模观测器的无刷直流电机无位置传感器控制

发布时间：2018-09-02 09:16

【摘要】：无刷直流电机(BLDCM)位置传感器的存在影响控制系统的可靠性、体积和成本,所以控制系统常采取无位置传感器的控制方法。提出了基于全局快速终端滑模观测器(GFTSMO)的无位置传感器控制策略,所提出的滑模观测器结合了非奇异终端滑模观测器(NTSMO)和线性滑模观测器的优点。该观测器引入了混合滑模面,具有全局快速收敛性和较好的跟踪精度,减少了常规滑模观测器的相位滞后问题,提高了转子位置与速度的估算精度。设计了高阶滑模控制律,保证观测器的稳定性并抑制抖振现象,可以得到平滑的反电动势信号。实验结果表明,所提出的控制策略能够准确估计得到无刷直流电机的线反电动势,加快收敛速度,系统具有较好的静、动态特性。实验结果验证了所提出控制方法的有效性。
[Abstract]:The existence of (BLDCM) position sensor in brushless DC motor affects the reliability, volume and cost of the control system, so the control system often adopts the sensorless control method. A sensorless position sensorless control strategy based on the global fast terminal sliding mode observer (GFTSMO) is proposed. The proposed sliding mode observer combines the advantages of the nonsingular terminal sliding mode observer (NTSMO) and the linear sliding mode observer. The hybrid sliding mode surface is introduced into the observer, which has fast global convergence and good tracking accuracy, reduces the phase lag problem of the conventional sliding mode observer, and improves the accuracy of rotor position and velocity estimation. A high order sliding mode control law is designed to ensure the stability of the observer and to suppress buffeting. The smooth backEMF signal can be obtained. The experimental results show that the proposed control strategy can accurately estimate the line back EMF of brushless DC motor and accelerate the convergence speed. The system has better static and dynamic characteristics. The experimental results show that the proposed control method is effective.
【作者单位】：天津大学电气与自动化工程学院;
【基金】：国家自然科学基金项目资助(51577125)
【分类号】：TM33

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