Resonance frequency tracking control of ultrasonic transducer for diminished haptics

Masaya Takasaki, Daisuke Yamaguchi, Masayuki Hara, Yuji Ishino, Takeshi Mizuno

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

2 Citations (Scopus)


Previously, 'diminished haptics' in which real surface texture can be transformed was proposed. Strong intensity ultrasonic vibration was applied to realize demonstration of the concept. To enjoy the demonstration, the intensity of the ultrasonic vibration on solid surface should be maintained. The ultrasonic transducer fabricated for this purpose consisted of a Langevin type ultrasonic transducer and a horn whose end was shaped in square. Large vibration amplitude can be acquired at resonance of the whole transducer as longitudinal vibration mode. On the other hand, resonant frequency easily changes due to operating conditions. To keep the amplitude, the resonant frequency should be tracked by real time. Tracking control with phase detection was applied with a newly developed control system. Step responses of oscillating frequency as results of tracking control are reported. The results show successful tracking control.

Original languageEnglish
Title of host publication2017 Asian Control Conference, ASCC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781509015733
Publication statusPublished - Feb 7 2018
Externally publishedYes
Event2017 11th Asian Control Conference, ASCC 2017 - Gold Coast, Australia
Duration: Dec 17 2017Dec 20 2017

Publication series

Name2017 Asian Control Conference, ASCC 2017


Other2017 11th Asian Control Conference, ASCC 2017
CityGold Coast

ASJC Scopus subject areas

  • Control and Optimization


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