Ryuichi Kohzawa

  • Citations Per Year
Learn More
Two 1-DOF pendulums coupled with a weak spring are considered. This system is a coupled Controlled Hamiltonian Systems that has been studied widely in these days. The control objective is to make pendulums swing synchronously with small input. To this end, Speed Gradient Energy method proposed by Fradkov is adopted to design the controller. Although(More)
Sound localization is one of important abilities for robots which utilize auditory information. Binaural information such as interaural time difference (ITD) or interaural intensity difference(IID) is effective for horizontal sound localization. In order to extend this ability to vertical sound localization, spectral cues were utilized in this paper instead(More)
An important ability in auditory robots is the localization of sound source. In this paper, a robust method to localize the vertical direction of the sound source with two microphones and pinnae is proposed. In order to achieve vertical sound source localization, the method of detecting spectral cues, the relationship between spectral cues and source(More)
In this paper, we deal with a tip position control problem of a flexible arm with dead zone for the control input torque. A design method of a passivity based adaptive output feedback control for nonlinear nonminmum-phase flexible arm systems will be presented. To realize an adaptive output feedback control for nonminimum-phase control systems, we introduce(More)
Humans perceive sound lags and differences in loudness between their two ears to ascertain the location of sounds in terms of azimuth, elevation and interval, etc. Humans and animals can determine the direction of sounds using only two ears, by making use of interaural time difference (ITD), interaural phase difference (IPD), interaural intensity difference(More)
  • 1