Title :
A Regressor Free Adaptive Backstepping Design of Flexible Joint Robot Based on Function Approximation Technique
Author :
Chang, Yin-Chieh ; Shaw, Jinsiang
Author_Institution :
Inst. of Mechatron. Eng., Nat. Taipei Univ. of Technol., Taipei, Taiwan
Abstract :
In this paper a function approximation technique is proposed for adaptive back stepping design of a flexible¡Vjoint robot manipulator. The dynamics of the robot manipulator are derived with the assumption that all matrices in this robot model are unknown. Since these matrices are time varying and their variation bounds are not given, traditional adaptive or robust control schemes cannot be applied. The function approximation technique is employed here to represent uncertainties in some finite linear combinations of the orthogonal basis. Using the Lyapunov stability theory, a set of update law is derived to give closed loop stability with proper tracking performance. A two-link flexible-joint robot is used in the computer simulation to verify validity and effectiveness of the proposed control law.
Keywords :
Lyapunov matrix equations; approximation theory; closed loop systems; control system synthesis; manipulators; Lyapunov stability theory; closed loop stability; controller design; finite linear combinations; flexible-joint robot manipulator; function approximation technique; regressor free adaptive backstepping design; robot model; two-link flexible-joint robot; Backstepping; Function approximation; Joints; Manipulator dynamics; backstepping design; flexible-joint robot manipulator; function approximation technique;
Conference_Titel :
Robot, Vision and Signal Processing (RVSP), 2011 First International Conference on
Conference_Location :
Kaohsiung
Print_ISBN :
978-1-4577-1881-6
DOI :
10.1109/RVSP.2011.10