为解决两自由度直驱感应电机(Two Degree of Freedom Direct Drive Induct Motor, 2DoFDDIM)矢量控制因受端部效应与耦合效应影响而导致解耦错误的问题,提出了一种两自由度直驱感应电机矢量控制策略。该控制策略基于一种考虑动态端部效...为解决两自由度直驱感应电机(Two Degree of Freedom Direct Drive Induct Motor, 2DoFDDIM)矢量控制因受端部效应与耦合效应影响而导致解耦错误的问题,提出了一种两自由度直驱感应电机矢量控制策略。该控制策略基于一种考虑动态端部效应与耦合效应的2DoFDDIM数学模型,对其解耦过程进行设计,在线计算修正滑差频率,通过MATLAB软件对2DoFDDIM启动、突增负载及给定转速变化等动态过程进行仿真,结果表明,该控制系统输出转速能够跟随给定,突加负载后恢复稳态时间为0.03 s,转速上升时间为0.05 s,并且能够抑制稳态时的转速波动。验证了控制系统模型的正确性及控制算法的可行性,为该类型电机的控制系统设计提供依据。展开更多
In order to promote the tolerance and controllability of the multi-degree-of-freedom(M-DOF) ultrasonic motor, a novel two-degree-of-freedom(2-DOF) spherical ultrasonic motor using three traveling-wave type annular sta...In order to promote the tolerance and controllability of the multi-degree-of-freedom(M-DOF) ultrasonic motor, a novel two-degree-of-freedom(2-DOF) spherical ultrasonic motor using three traveling-wave type annular stators was put forward. Firstly,the structure and working principle of this motor were introduced, especially a spiral spring as the preload applied component was designed for adaptive adjustment. Then, the friction drive model of 2-DOF spherical motor was built up from spatial geometric relation between three annular stators and the spherical rotor which was used to analyze the mechanical characteristics of the motor.The optimal control strategy for minimum norm solution of three stators' angular velocity was proposed, using Moore-Penrose generalized inverse matrix. Finally, a 2-DOF prototype was fabricated and tested, which ran stably and controllably. The maximum no-load velocity and stall torque are 92 r/min and 90 m N·m, respectively. The 2-DOF spherical ultrasonic motor has compact structure, easy assembly, good performance and stable operation.展开更多
基金Project(51107111)supported by the National Natural Science Foundation of China
文摘In order to promote the tolerance and controllability of the multi-degree-of-freedom(M-DOF) ultrasonic motor, a novel two-degree-of-freedom(2-DOF) spherical ultrasonic motor using three traveling-wave type annular stators was put forward. Firstly,the structure and working principle of this motor were introduced, especially a spiral spring as the preload applied component was designed for adaptive adjustment. Then, the friction drive model of 2-DOF spherical motor was built up from spatial geometric relation between three annular stators and the spherical rotor which was used to analyze the mechanical characteristics of the motor.The optimal control strategy for minimum norm solution of three stators' angular velocity was proposed, using Moore-Penrose generalized inverse matrix. Finally, a 2-DOF prototype was fabricated and tested, which ran stably and controllably. The maximum no-load velocity and stall torque are 92 r/min and 90 m N·m, respectively. The 2-DOF spherical ultrasonic motor has compact structure, easy assembly, good performance and stable operation.