Enhanced Force Estimation for Electromechanical Brake Actuators in Transportation Vehicles

Zhuang Xu, Chris Gerada

Research output: Journal PublicationArticlepeer-review

Abstract

In transportation vehicles, the installation of force sensors for electromechanical brake systems causes cost issues and implementation difficulties. The elimination of the sensor is highly demanded. The main vulnerability of the existing force estimators is that the algorithms either rely on shifting characteristic curves or empirical data to determine the major quantities. Hence, they are less capable of dealing with initialization offset errors, fast-changing dynamics, and uncertainties. This article presents a novel super-twisting observer to accurately estimate the clamping force on the basis of a dynamic torque-balance model. In this observer, an extended state is defined on top of a super-twisting algorithm. The observer gains are computed through a smooth Lyapunov function to guarantee the fast convergence. It is experimentally validated that the observer enhances the performance required by the antilock braking systems in comparison with conventional methods.

Original languageEnglish
Article number9445627
Pages (from-to)14329-14339
Number of pages11
JournalIEEE Transactions on Power Electronics
Volume36
Issue number12
DOIs
Publication statusPublished - Dec 2021

Keywords

  • Electromechanical brake
  • force estimation
  • motor drives

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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