Projection-based integrators for improved motion control: Formalization, well-posedness and stability of hybrid integrator-gain systems

نویسندگان

چکیده

In this paper we formally describe the hybrid integrator-gain system (HIGS), which is a nonlinear integrator designed to avoid limitations typically associated with linear integrators. The HIGS keeps sign of its input and output equal, thereby inducing less phase lag than integrator, much like famous Clegg integrator. achieves reduced by projection controller dynamics instead using resets state, forms potential benefit control element. To analyze HIGS-controlled systems, present an appropriate mathematical framework for describing these novel systems. Based on framework, systems are proven be well-posed in sense existence forward completeness solutions. Moreover, propose two approaches analyzing (input-to-state) stability resulting closed-loop systems: (i) circle-criterion-like conditions based (measured) frequency response data, (ii) LMI-based exploiting new construction piecewise quadratic Lyapunov functions. A motion example used illustrate results.

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ژورنال

عنوان ژورنال: Automatica

سال: 2021

ISSN: ['1873-2836', '0005-1098']

DOI: https://doi.org/10.1016/j.automatica.2021.109830