http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Model-Based Control for High-Pressure Fuel Pumps
Yoichi Iihoshi,Shin Yamauchi,Ryusei Miura,Yoshikuni Kurashima,Toshio Hori 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This document describes a model-based controller for a high-pressure fuel system on a direct injection engine. This controller drives a high-pressure fuel pump with an inverse pump model and keeps injection pressure under control with a disturbance observer and a proportional (P) controller. The designed controller is a two-degrees-of-freedom control that can improve step response time and nominal pulsation at the same time. Theeffectiveness of the proposed method is investigated using real engine experiments and produces successful results compared with a PI controller.
Fractional Order Impedance Control by Particle Swarm Optimization
Sehoon Oh,Yoichi Hori 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
This paper suggests a methodology to realize fractional order impedance using feedback control of a motor, which can be called fractional impedance control. First, a novel discretization method of a fractional order integrator is proposed based on the coefficient fitting by particle swarm optimization. Based on this fractional order integrator, fractional order impedance control is realized using feedback control design. The characteristics of fractional impedance are analyzed by simulations, and the algorithm is implemented in a motor and the characteristics are made clear by experiments
Yunha Kim,Hiroshi Fujimoto,Yoichi Hori 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
Recently many works have been done on electric vehicle motion control. Most of them, however, still remain in the horizon of the conventional vehicle chassis structure, which is waste of ability. This paper presents a novel steer-by-wire system for electric vehicles using caster wheels and independent driving motors, which maximizes degrees of freedom in EV mobility and eventually distinguishes EVs from the ICEVs. A small-sized experimental vehicle is introduced and its basic dynamic characteristics are shown with actual experimental data. It is shown that the mobility of the vehicle can be improved by using caster wheels and independent driving motors at low speed, while it maintains stability at high speed. Feasibilities for future EV applications are shown with mathematical modeling and analyses, and control strategies are proposed in the paper.
Design and Analysis of Force-Sensor-Less Power-Assist Control
Sehoon Oh,Kyoungchul Kong,Hori, Yoichi IEEE 2014 IEEE transactions on industrial electronics Vol.61 No.2
<P>Due to the recent trend of the application of robots and other mechatronic devices to human life support, the force control draws more attention than ever. However, to use force sensors in all the required cases makes the system not only expensive but also bulky. Force-sensor-less power-assist control (FSPAC) which uses only encoders to obtain the external force information and provides force control performance can address this problem. Due to its simplicity and wide application, FSPAC is an essential technology to control a motor in a human-friendly way, but the design of FSPAC is different from the conventional feedback controllers so a new design methodology needs to be established. In order to attack this problem, this paper generalizes and analyzes the structure and characteristics of FSPAC. The generalized structure reveals how FSPAC can achieve the assistance, and the transfer function analysis based on the structure addresses the robustness and assistance performance evaluation problems. The robustness of FSPAC is analyzed in terms of the gain margin and robust stability, and the limitation of the power assistance to guarantee the robust stability is derived. Then, the evaluation way of feedback control design in FSPAC is provided. All the discussion in this paper provides the readers with understanding and appropriate design methodology of FSPAC.</P>