Global stabilisation of underactuated mechanical systems via PID passivity-based control

Jose Guadalupe Romero*, Alejandro Donaire, Romeo Ortega, Luis Pablo Borja Rosales

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

30 Citations (Scopus)
33 Downloads (Pure)


In this note we identify a class of underactuated mechanical systems whose desired constant equilibrium position can be globally stabilised with the ubiquitous PID controller. The class is characterised via some easily verifiable conditions on the systems inertia matrix and potential energy function, which are satisfied by many benchmark examples. The design proceeds in two main steps, first, the definition of two new passive outputs whose weighted sum defines the signal around which the PID is added. Second, the observation that it is possible to construct a Lyapunov function for the desired equilibrium via a suitable choice of the aforementioned weights and the PID gains. (C) 2018 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)178-185
Number of pages8
Publication statusPublished - Oct-2018


  • Mechanical systems
  • Nonlinear systems
  • Stabilisation

Cite this