【作者】 谢玉春；

【导师】 李铁才；

【作者基本信息】 哈尔滨工业大学 ， 电气工程， 2011， 硕士

【摘要】 高端制造业具有成长性好、附加值高、关键性强、技术和知识密集、带动性大等特点,是国家“十二五规划”的六大战略性新兴产业之一。伺服驱动系统是现代制造业的重要驱动源之一,永磁同步电机逐步取代步进电机和直流电机,成为伺服驱动的发展方向。由于永磁同步电机伺服系统易受电机参数变化、外部负载扰动等因素的影响,要获得高性能、宽调速范围永磁同步电机伺服系统,必须研究先进的控制策略与控制手段,实现系统强抗扰能力和适应性。鉴于永磁同步电机伺服系统重要的现实意义和广泛的应用前景,本文对永磁同步电机伺服控制技术进行了深入研究,并完成对伺服控制器的设计。首先,通过坐标变换,建立永磁同步电机在三种坐标系下的数学模型。为满足伺服控制系统高精度、宽调速范围和快速响应等性能要求,采用矢量控制算法实现永磁同步电机转矩和磁链的解耦控制。通过对矢量控制的四种不同电流控制方法的比较分析,结合小惯量面装式永磁同步电机的特点和伺服控制系统的控制要求,选定id ?0的转子磁场定向矢量控制方案。其次,按照自动控制系统调节器的工程设计方法,设计电流环和速度环PI调节器,分析电流和速度微分负反馈抑制动态响应超调的机理,通过速度微分负反馈实现速度环的全状态反馈控制。针对单自由度控制器无法同时兼顾跟踪性和抗扰性的问题,研究二自由度控制算法对速度环进行改善,设计简化的滤波型二自由度速度控制器,提高了转速控制的跟踪性能和抗扰性能。再次,为提高位置环控制性能,采用位置复合前馈控制对位置环比例控制器进行改进,消除反馈控制产生的滞后误差,实现位置快速跟踪和准确定位。针对位置环控制性能易受转动惯量变化的影响,通过朗道算法实现转动惯量参数辨识,设计位置环自适应控制器,仿真结果表明位置环具备良好的抗参数摄动能力。最后,研究适于工程实践的永磁同步电机参数测量方法,为控制器设计打下基础。搭建以高性能32位MCU TC1166为核心处理芯片的永磁同步电机伺服系统硬件平台,设计数字控制器,实现高性能控制算法。实验结果表明,系统能够实现位置的快速准确定位和速度的无超调快速响应,满足伺服系统的性能需求。更多还原

【Abstract】 High-level manufacturing industry is one of the six emerging strategic industries of "Twelfth National Five-Year Plan", which has the many advanced characters, including intensive technology and knowledge, high added value, good growth, etc. Servo system is an important driving source of modern manufacturing, and it is a trend that permanent magnet synchronous motor(PMSM) replaces the stepper motor and DC motor to become the main actuator of servo system. As PMSM servo system is vulnerable to motor parameters and external load disturbance, advanced control strategies should be studied to achieve strong anti-interference ability and adaptability. In view of the great practical significance and practical value of AC servo system, control technology for PMSM servo system is studied and a PMSM servo controller is designed in this paper.Firstly, the mathematical model for PMSM is established under three types of coordinate. On that basis, different speed-control strategies for PMSM are analysed, and the vector control algorithms with different current control objective are compared. Ultimately, basic control strategy for PMSM servo control is determined. Three-loops design of the servo system is accomplished by an inside-outside design method. Simulation results show that the design is reasonable.Secondly, to solve the existing problems for inner two-loops design of servo system and meet the performance requirements of servo system, more advanced control strategies for PMSM servo system are discussed. Based on the differential negative feedback control strategy, a filter set two-degree-of-freedom control method is finally used in the speed loop, which achieves excellent performances in both tracking and disturbance rejecting.Thirdly, to achieve fast and accurate response, a feed-forward control strategy is used in the position loop, which can eliminate the error caused by the tracking lag. An identification method for the moment of inertia is designed. On that basis, an adaptive inertia control method of position loop is proposed.Finally, to ensure the accuracy of the three loops design of servo systems, a measurement method for PMSM parameters is studied. An experimental platform of PMSM servo system is built based on the tricore MCU TC1166, realizing the digital design of servo control strategy. The experimental results demonstrate the system has good dynamic performance and steady state accuracy, and the proposed control strategy is reasonable and feasible.更多还原