84 citations · 196 across the 20 of their papers we have counts for
21 papers
Geometric Transition of Latent Dynamics in Intermittent Chaos: SVD-based Effective Dimension for Detection and Proactive Control
Takashi Hikihara, Tetsushi Saburi
This paper investigates the geometric detection of latent dynamic transitions (where the latent space is defined as a finite-dimensional state space reconstructed via a delay-embed…
Asymmetric Coupling Anisotropy for Causal Information Filtering in Physical Reservoirs
Takashi Hikihara, Yuma Aoki
We demonstrate a physical mechanism for causal information filtering in a physical reservoir computing (PRC) by exploiting asymmetric coupling anisotropy. Using a network of couple…
Homoclinic Intersections and the Macroscopic Observability of Arnold Tongues in the Forced-Dissipative Duffing System
Takashi Hikihara
Dissipative chaos often exhibits abrupt transitions to periodic windows or vanishing states, but these transitions occur far below macroscopic theoretical boundaries such as the Me…
Routing optimization on power packet dispatching system based on energy loss minimization
Shiu Mochiyama, Kazuhiro Koto, Takashi Hikihara
Power packet dispatching system has been proposed for smart power management in the form of discretized packet. In this paper, we discuss the routing optimization of power packets…
Output Series-Parallel Connection of Passivity-Based Controlled DC-DC Converters: Generalization of Asymptotic Stability
Yuma Murakawa, Takashi Hikihara
The series-paralleling technique of dc-dc converters is utilized in various domains of electrical engineering for improved power conversion. Previous studies have proposed and clas…
Decentralized Algorithms for Consensus-Based Power Packet Distribution
Seongcheol Baek, Hiroyasu Ando, Takashi Hikihara
Power packets are proposed as a transmission unit that can deliver power and information simultaneously. They are transferred using the store-and-forward method of power routers. A…
Electric Power Processing Using Logic Operation and Error Correction
Shota Inagaki, Shiu Mochiyama, Takashi Hikihara
In this study, electric power is processed using the logic operation method and the error correction algorithms to meet load demand. Electric power was treated as physically flow t…
Characterizing scale dependence of effective diffusion driven by fluid flows
Yohei Kono, Yoshihiko Susuki, Takashi Hikihara
We study the scale dependence of effective diffusion of fluid tracers, specifically, its dependence on the Péclet number, a dimensionless parameter of the ratio between advection a…
Two Dimensional Swarm Formation in Time-invariant External Potential: Modelling, Analysis, and Control
Yanran Wang, Takashi Hikihara
Clustering formation has been observed in many organisms in Nature. It has the desirable properties for designing energy efficient protocols for Wireless Senor Networks (WSNs). In…
A Lumped-Parameter Model of Multiscale Dynamics in Steam Supply Systems
Hikaru Hoshino, Yoshihiko Susuki, Takashi Hikihara
This paper focuses on multiscale dynamics occurring in steam supply systems. The dynamics of interest are originally described by a distributed-parameter model for fast steam flows…
Dynamic behaviour of a ring coupled boost converter system with passivity-based control
Rutvika Manohar, Takashi Hikihara
This paper discusses a dispersed generation system of multiple DC/DC converters with DC power sources connected in a ring formulation. Here is presented the analysis of the system…
Structural Analysis and Control of a Model of Two-site Electricity and Heat Supply
Hikaru Hoshino, Yoshihiko Susuki, T. John Koo +1
This paper introduces a control problem of regulation of energy flows in a two-site electricity and heat supply system, where two Combined Heat and Power (CHP) plants are interconn…
High-Speed Gate Driver Using GaN HEMTs for 20-MHz Hard Switching of SiC MOSFETs
Takafumi Okuda, Takashi Hikihara
In this paper, we investigated a gate driver using a GaN HEMT push-pull configuration for the high-frequency hard switching of a SiC power MOSFET. Low on-resistance and low input c…
Transient Behavior of Redox Flow Battery Connected to Circuit Based on Global Phase Structure
Toko Mannari, Takashi Hikihara
A Redox Flow Battery (RFB) is one of the promising energy storage systems in power grid. An RFB has many advantages such as a quick response, a large capacity, and a scalability. D…
Power packet transferability via symbol propagation matrix
Shinya Nawata, Atsuto Maki, Takashi Hikihara
Power packet is a unit of electric power transferred by a power pulse with an information tag. In Shannon's information theory, messages are represented by symbol sequences in a di…
On the Spectral Equivalence of Koopman Operators through Delay Embedding
Yoshihiko Susuki, Kyoichi Sako, Takashi Hikihara
We provide one theorem of spectral equivalence of Koopman operators of an original dynamical system and its reconstructed one through the delay-embedding technique. The theorem is…
Applied Koopman Operator Theory for Power Systems Technology
Yoshihiko Susuki, Igor Mezic, Fredrik Raak +1
Koopman operator is a composition operator defined for a dynamical system described by nonlinear differential or difference equation. Although the original system is nonlinear and…
Active and reactive power in stochastic resonance for energy harvesting
Madoka Kubota, Ryo Takahashi, Takashi Hikihara
A power allocation to active and reactive power in stochastic resonance is discussed for energy harvesting from mechanical noise. It is confirmed that active power can be increased…
Security of Power Packet Dispatching Using Differential Chaos Shift Keying
Yanzi Zhou, Ryo Takahashi, Takashi Hikihara
This paper investigates and confirms one advantageous function of a power packet dispatching system, which has been proposed by authors' group with being apart from the conventiona…
Logic-Memory Device of a Mechanical Resonator
Atsushi Yao, Takashi Hikihara
We report multifunctional operation based on the nonlinear dynamics in a single microelectromechanical system (MEMS) resonator. This Letter focuses on a logic-memory device that us…
Counter operation in nonlinear micro-electro-mechanical resonators
Atsushi Yao, Takashi Hikihara
This paper discusses a logical operation of multi-memories that consist of coupled nonlinear micro-electro-mechanical systems (MEMS) resonators. A MEMS resonator shows two coexisti…