Orientation sensing of 3-DOF spherical motor

[1] Lee K M, Ga M. Orientation sensing system and method for a spherical body . US:5319577, 1994-06[2] Wang J,Jewell G W, Howe D. Analysis, design and control of a novel spherical permanent-magnet actuator[J] IEE Proc -Elevtr Power Appl,1998,145(1):61~71[3] Wang J, Jewell G W, Howe D. Modelling of a novel spherical permanent magnet actuator .In:Proceeding of the 1997 IEEE International Conference on Robotics and Automation Albuquerque . New Mexico, 1997. 1190~1195[4] Pei J. Methodology of design and analysis of variable-reluctance spherical motors . Georgia:Georgia Institute of Technology, 1990[5] Xsens Technologies, Netherlands, MT9 Real-time 3D Motion Tracker[S] 2002[6] Lee K M, Zhou Debao. A real-time optical sensor for simultaneous measurement of 3-DOF motions .In:Proceedings of the 2003 IEEE/ASME International Conference on Advanced Intelligent Mechatronics ,2003. 472~47[7] Garner H D. Development of a real-time vision based absolute orientation sensor .Georgia:Georgia Institute of Technology, May 2001[8] Wang W, Wang J, Jewell G W, et al, Design and control of a novel spherical permanent magnet actuator with three degree of freedom[J] IEEE/ASME Transaction on Mechatronics,2003, 8(4):457~468[9] Specification of optical sensors .[10] Yan L, Lim C K, Chen I M, et al. A hybrid approach for magnetic field analysis .In:Proceedings of the 2004 IEEE Conference on Robotics, Automation and Mechatronics . Singapore, 2004. 530~535[11] Craig J J. Introduction to robotics:mechanics and control[M] Addison-Wesley Publishing Company, 1989[12] Richard M M, Li Z, Sastry S S. A mathematical introduction to robotic manipulation[M] CRC Press, 1994