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Abstract

Soft robots are intrinsically underactuated mechanical systems that operate under uncertainties and disturbances. In these conditions, this letter proposes two versions of PID-like control laws with a saturated integral action for the particularly challenging shape regulation task. The closed-loop system is asymptotically stabilized and matched constant disturbances are rejected using a very reduced amount of system information for control implementation. Stability is assessed on the underactuated dynamic model through the Invariant Set Theorem for two relevant classes of soft robots, i.e., elastically decoupled and elastically dominated soft robots. Extensive simulation results validate the proposed controllers.

DOI

10.1109/lra.2022.3221304

Publication Date

2022-10-24

Publication Title

IEEE Robotics and Automation Letters

Volume

8

Issue

1

First Page

1

Last Page

8

Embargo Period

2023-03-18

Organisational Unit

School of Engineering, Computing and Mathematics

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