Closed-loop control of spherical actuator based on voltage model

This paper presents a three degree-of-freedom (DOF) permanent magnet spherical actuator, with precise orientation measurement system. Motion control of spherical actuator has been a challenging problem so far. Current-torque control method is the most available control method for permanent magnet spherical actuator, but the control system of this method is quite complex and costly. In this paper we propose a closed-loop control method based on voltage model. This control method not only possesses the advantages of the current-torque control method but also owns a simpler and less costly control system. In addition, the back-emf research of permanent magnet spherical actuator is also discussed in this paper.

[1]  Guilin Yang,et al.  Analytical and experimental investigation on the magnetic field and torque of a permanent magnet spherical actuator , 2006, IEEE/ASME Transactions on Mechatronics.

[2]  K.-M. Lee,et al.  Kinematic analysis of a three degree-of-freedom spherical wrist actuator , 1991, Fifth International Conference on Advanced Robotics 'Robots in Unstructured Environments.

[3]  Changliang Xia,et al.  A dynamic decoupling control algorithm for Halbach array permanent magnet spherical motor based on computed torque method , 2007, 2007 IEEE International Conference on Robotics and Biomimetics (ROBIO).

[4]  K. Lee,et al.  Experimental Investigation on the Magnetic Field of a Permanent Magnet Spherical Actuator , 2005, AIM 2005.

[5]  F. C. Williams,et al.  Development and design of spherical induction motors , 1959 .

[6]  Changliang Xia,et al.  A Neural-Network-Identifier and Fuzzy-Controller-Based Algorithm for Dynamic Decoupling Control of Permanent-Magnet Spherical Motor , 2010, IEEE Transactions on Industrial Electronics.

[7]  Hungsun Son,et al.  Distributed Multipole Model for Design of Permanent-Magnet-Based Actuators , 2007, IEEE Transactions on Magnetics.

[8]  Liang Yan,et al.  Design and Analysis of a Permanent Magnet Spherical Actuator , 2008 .

[9]  Kyong Sei Lee,et al.  Design of air bearing system for fine motion application of multi-DOF spherical actuators , 1999, 1999 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (Cat. No.99TH8399).

[10]  R.W. De Doncker,et al.  Torque control of a spherical machine with variable pole pitch , 2004, IEEE Transactions on Power Electronics.

[11]  Jun Liu,et al.  Torque modeling and control algorithm of a permanent magnetic spherical motor , 2009, 2009 International Conference on Electrical Machines and Systems.

[12]  Liang Yan,et al.  Current optimization of 3-DOF permanent magnet spherical motor , 2011, 2011 6th IEEE Conference on Industrial Electronics and Applications.

[13]  Zheng Li.  Robust Control of PM Spherical Stepper Motor Based on Neural Networks , 2009, IEEE Transactions on Industrial Electronics.