Modeling and Control of Flexible Telescoping Manipulators

This paper considers modeling and control of a planar flexible two-link telescoping manipulator. The telescoping interface between the deploying and non-deploying portions of the links is discussed in detail. The equations of motion are derived using Lagrange's equation and constrained using a projection method that eliminates the need to compute Lagrange multipliers explicitly. Passivity-based control of the telescoping manipulator is also investigated. It is shown that several passive input-output maps exist. In particular, by a suitable redefinition of the inputs and outputs, a modified tip-based control is made possible. The model is validated through numerical simulation, and the tip-based control is compared with joint-based control. Simulation results show that tip-based control has better closed-loop performance compared with joint-based control.

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