no code implementations • 12 May 2023 • Hikaru Hoshino, T. John Koo, Yun-Chung Chu, Yoshihiko Susuki
Flexibility provided by Combined Heat and Power (CHP) units in district heating networks is an important means to cope with increasing penetration of intermittent renewable energy resources, and various methods have been proposed to exploit thermal storage tanks installed in these networks.
no code implementations • 20 Dec 2022 • Chiaki Kojima, Yuya Muto, Yoshihiko Susuki
Finally, we discuss a reduction of distribution losses by injecting a linear combination of the active and reactive powers as a control input based on the dissipation rate of the subsystem corresponding to voltage amplitude.
no code implementations • 9 Jul 2022 • Ryo Miyashita, Yoshihiko Susuki, Atsushi Ishigame
Control of warm-water supply for dialysis treatment in a hospital environment is typical of safety-critical control problems.
no code implementations • 7 Jul 2022 • Yoshihiko Susuki, Kohei Eto, Naoto Hiramatsu, Atsushi Ishigame
This paper addresses a control problem on air-conditioning systems in buildings that is regarded as a control practice of nonlinear distributed-parameter systems.
no code implementations • 23 May 2022 • Kenji Takamichi, Yoshihiko Susuki, Marcos Netto, Atsushi Ishigame
This paper proposes a mode-in-state contribution factor for a class of nonlinear dynamical systems by utilizing spectral properties of the Koopman operator and sensitivity analysis.
no code implementations • 26 Jan 2021 • Shota Yumiki, Yoshihiko Susuki, Yuta Oshikubo, Yutaka Ota, Ryo Masegi, Akihiko Kawashima, Atsushi Ishigame, Shinkichi Inagaki, Tatsuya Suzuki
We develop a system-level design for the provision of Ancillary Service (AS) for control of electric power grids by in-vehicle batteries, suitably applied to Electric Vehicles (EVs) operated in a sharing service.
no code implementations • 27 Aug 2020 • Naoto Hiramatsu, Yoshihiko Susuki, Atsushi Ishigame
By estimating the temperature gradient directly from data, we show that KMD is capable of extracting a distinct structure of the heat flux embedded in the oscillatory temperature field, relevant in terms of air conditioning.
no code implementations • 4 Nov 2019 • Akitoshi Masuda, Yoshihiko Susuki, Manel Martínez-Ramón, Andrea Mammoli, Atsushi Ishigame
Koopman Mode Decomposition (KMD) is a technique of nonlinear time-series analysis that originates from point spectrum of the Koopman operator defined for an underlying nonlinear dynamical system.