1Tenreiro M J A. Variable structure control of manipulators with compliant joints[C]. Proc IEEE Int Industrial Electronics Conf. Budapest, 1993: 554-559.
2Spong M W. Modeling and control of elastic joint robots[J]. J of Dynamics Systems, Measurement and Control, 1987, 109(4): 310-319.
3Lozano R, Brogliato B. Adaptive control of robot manipulators with flexible joints[J]. IEEE Trans on Automatic Control, 1992, 37(2): 174-181.
4Bridges M M, Dawson D M, Abdallah C T. Control of rigid-link, flexible-joint robots: A survey of backstepping approaches[J]. J of Robotic Systems, 1995, 12(3): 119- 216.
5Swaroop D, Hedrick J K, Yip P E et al. Dynamic surface control for a class of nonlinear systems[J]. IEEE Trans on Automatic Control, 2000, 45(10): 1893-1899.
6Wang D, Huang J. Neural network-based adaptive dynamic surface control for a class of uncertain nonlinear systems in strict-feedback form[J]. IEEE Trans on Neural Networks, 2005, 16(1): 195-202.
7Yoo S J, Park J B, Choi Y H. Adaptive dynamic surface control of fexible-joint robots using self-recurrent wavelet neural networks[J]. IEEE Trans on Systems, Man and Cybernetics, 2006, 36(6): 1342-1355.
8Yoo S J, Park J B, Choi Y H. Adaptive output feedback control of flexible-joint robots using neural networks: Dynamic surface design approach[J]. IEEE Trans on Neural Networks, 2008, 19(10): 1712-1726.
9Elman J. Finding structure in time[J]. Cognitive Science, 1990, 14(2): 179-211.
10Li X, Chen G R, Chen Z Q, et al. Chaotifying linear elman networks[J]. IEEE Trans on Neural Networks, 2002, 13(5): 1193-1199.
