This paper presents investigations into the development of control schemes for end-point vibration suppression and input tracking of a flexible manipulator. A constrained planar single-link flexible manipulator is considered and the dynamic model of the system is derived using the assumed mode method. To study the effectiveness of the controllers, a Linear Quadratic Regulator (LQR) was initiall...

This paper presents a variable structure rule-based fuzzy control for trajectory tracking and vibration control of a flexible joint manipulator by using chaotic anti-control. Based on Lyapunov stability theory for variable structure control and fuzzy rules, the nonlinear controller and some generic sufficient conditions for global asymptotic control are attained. The fuzzy rules are directly co...

In this study, SimMechanics-based dynamic modeling and vibration analysis of a single-link flexible manipulator are studied. A beam model is set up for the manipulator. Transient performed to obtain endpoint acceleration responses moved with different motion profiles. Both experimental simulation results presented cases. The root means square (RMS) values calculated evaluate compatibility perfo...

An adaptive controller is presented in this paper to control an n-link flexible-joint manipulator with time-varying uncertainties. The function approximation technique (FAT) is utilized to represent time-varying uncertainties in some finite combinations of orthogonal basis. The tedious computation of the regressor matrix needed in traditional adaptive control is avoided in the new design, and t...

A simple collision detection method for a flexible link manipulator is proposed. The method only requires two strain measurements to determine the position of a collision with the flexible link. Equations which relate the force and position of contact to the strain at two points in the flexible link are derived assuming the link is at static equilibrium. Since the flexible robot is actually in ...

A control method without state feedback of the free link is proposed for swing-up and stabilization at the upright position of a flexible free link in a twolink underactuated flexible manipulator (the active first and free second links are rigid and flexible, respectively). The proposed method is based on the actuation of bifurcations produced in the second link under high-frequency excitation ...

This paper presents a second order sliding mode control (SOSMC) for a single link flexible manipulator, which represents a class of under actuated systems. A second order super twisting algorithm (STA) is used to provide better positional accuracy and robustness against parametric variation and external disturbances with alleviation in chattering. A smooth control is synthesized using STA to ex...

This paper presents a method for the on-line identification of the payload carried by a single-link flexible manipulator whose movement is constrained to the vertical plane. The vertical movement of the robot makes the effect of gravity not negligible, and determines therefore, the non-linear behaviour of the analysed system. The proposed estimator is based on the algebraic derivative approach ...

A control scheme for flexible-link manipulators is advanced which is based on the notion of nonlinear inner–outer factorization. It is well known that the inverse of the forward dynamics map from joint torques to manipulator tip motion is noncausal and cannot be implemented in conjunction with real-time path planning. The methods used here determine causal approximations for the inverse dynamic...

This paper mainly focuses on dynamic modelling and real‐time control for a parallel manipulator with flexible link. The Lagrange principle and assumed modes method (AMM) substructure technique is presented to formulate the dynamic modelling of a two‐degrees‐of‐freedom (DOF) parallel manipulator with flexible links. Then, the singular perturbation techniqu...