Initial condition-adaptive robust control for a high-speed magnetic actuator

Taketoshi Kawabe

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


This paper deals with a robust control method for a magnetic actuator for lift motion applications. The actuator is driven by electromagnets positioned around an armature connected to an actuated object. The armature is suspended by springs with a large spring rate, enabling it to move at high speed. A feedback controller has been designed to adjust the magnetic force so as to moderate the speed of the armature when it comes in contact with the magnets, thereby reducing mechanical shock and noise. Difficulties in designing the controller stem from magnetic force properties, such as severe instability and nonlinearity, which prevent push-pull type actuation. To overcome such difficulties with sufficient robustness, an adaptive control scheme has been developed, which varies the control force depending on the initial condition at which the controller is activated.

Original languageEnglish
Pages (from-to)675-685
Number of pages11
JournalControl Engineering Practice
Issue number6
Publication statusPublished - Jun 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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