Non-singular terminal sliding mode control of an omnidirectional mobile manipulator based on extended state observer
Tóm tắt
This paper presents a non-singular terminal sliding mode control (NTSMC) design based on an improved extended state observer (IESO) with application to an omnidirectional mobile manipulator (OMM) for trajectory tracking control. Firstly, a unified dynamic model is derived based on Lagrange method for an OMM prototype. An IESO that can reduce the initial peaking phenomenon is applied to estimate the model uncertainties and external disturbances. Then a non-singular terminal sliding mode controller is applied for trajectory tracking control. Stability of the closed-loop system is analyzed using Lyapunov theory. Finally, both simulations and experimental tests verify the effectiveness of the proposed control scheme.
Tài liệu tham khảo
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