Energy saving by extremum-seeking control using an actuator with adjustable stiffness (AwAS)

Takafumi Okubo, Hiromitsu Ohmori

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In repetitive motions, Actuator with Adjustable Stiffness (AwAS) can realize resonance and largely reduce energy consumption thanks to its ability to change the level of stiffness and adjust its natural frequency to the desired motion's frequency. In conventional method, an ideal stiffness value is calculated from frequency of the target motion and parameters of AwAS beforehand. This is an off-line system. Extremum-seeking control allows AwAS to optimize its stiffness on-line. Therefore, even if the frequency of the desired motion or parameters of AwAS change in unexpected time, it can optimize the stiffness and realize energy saving continuously. It was confirmed by numerical simulations.

Original languageEnglish
Title of host publicationProceedings of the SICE Annual Conference
Pages1836-1841
Number of pages6
Publication statusPublished - 2013
Event2013 52nd Annual Conference of the Society of Instrument and Control Engineers of Japan, SICE 2013 - Nagoya, Japan
Duration: 2013 Sep 142013 Sep 17

Other

Other2013 52nd Annual Conference of the Society of Instrument and Control Engineers of Japan, SICE 2013
CountryJapan
CityNagoya
Period13/9/1413/9/17

Fingerprint

Energy conservation
Actuators
Stiffness
Natural frequencies
Energy utilization
Computer simulation

Keywords

  • Adjustable stiffness
  • Energy saving
  • Extremum-seeking control
  • Resonance

ASJC Scopus subject areas

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

Cite this

Okubo, T., & Ohmori, H. (2013). Energy saving by extremum-seeking control using an actuator with adjustable stiffness (AwAS). In Proceedings of the SICE Annual Conference (pp. 1836-1841)

Energy saving by extremum-seeking control using an actuator with adjustable stiffness (AwAS). / Okubo, Takafumi; Ohmori, Hiromitsu.

Proceedings of the SICE Annual Conference. 2013. p. 1836-1841.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Okubo, T & Ohmori, H 2013, Energy saving by extremum-seeking control using an actuator with adjustable stiffness (AwAS). in Proceedings of the SICE Annual Conference. pp. 1836-1841, 2013 52nd Annual Conference of the Society of Instrument and Control Engineers of Japan, SICE 2013, Nagoya, Japan, 13/9/14.
Okubo T, Ohmori H. Energy saving by extremum-seeking control using an actuator with adjustable stiffness (AwAS). In Proceedings of the SICE Annual Conference. 2013. p. 1836-1841
Okubo, Takafumi ; Ohmori, Hiromitsu. / Energy saving by extremum-seeking control using an actuator with adjustable stiffness (AwAS). Proceedings of the SICE Annual Conference. 2013. pp. 1836-1841
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