Modeling and Analysis of a Magnetic Geared Linear Motor

A special magnetic geared tubular linear mo-tor which combines a tubular magnetic gear and a tubular linear motor for direct-drive applications is presented in this paper. The structure and operating principle of the machine are introduced, then magnetic flux distribution of the gear and thrust force generated by winding coils are simulated by using 2-D modeling. Finite-element calculation is used to confirm the accurate of results.journal articl

Analysis and Experimental Verification of Radial-Gap Two-Degree-of-Freedom Motor Based on a Magnetic Screw Structure

This article proposes a radial-gap two-degree-of-freedom motor based on a magnetic screw structure. The proposed motor is composed of stator parts, rotor parts, and a mover part, and can generate torque and thrust force simultaneously and independently. Additionally, the motor can generate a large thrust force with the magnetic screw structure. In the proposed motor, the rotor parts and mover part, which act as the nut and screw of ball screws, are coupled with each other by means of magnetic force. Therefore, there is no friction between the rotor parts and mover part. The proposed motor can not only contribute to the minimization of multidegree-of-freedom systems, such as industrial robots but also improve the energy efficiency of robots. This article examines the effectiveness of the proposed motor through analysis and experimental results.journal articl

Observation of B+ → χc0K+

journal articl

Using a Nonlinear Disturbance Observer to Estimated the Human Force Applied to a Two-Wheeled Cane for Walking Assistance

Applying a nonlinear disturbance observer to a two-wheeled cane for walking assistance is proposed in this paper. The hardware design and controller for the two-wheeled cane are also presented. The two-wheeled cane is designed to help users, especially the elderly walk and balance. The design of the two-wheeled cane is based on an inverted pendulum model, and to validate the performance of system multiple simulation and experimental tests were performed with the designed hardware model. The nonlinear disturbance observer presented good results, which were the same as the force sensor measurement signals. The experimental results show that the two-wheeled cane based on the nonlinear disturbance observer is useful to help elderly persons maintain their balance.© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society, 21-23 Oct. 2018, Washington, DC, USAconference pape

特集3 : 研究解説 : 量子マイクロ構造半導体における形成技術と機能創製 : 原子層制御から立体量子構造へ

原子層単位で厚さと組成を制御して作る半導体超薄膜やこれを要素とした層状の量子マイクロ構造について、主要な電子の物性・機能と応用例を紹介するとともに、原子スケールで層状構造の界面を評価し,制御する研究の現状を記す。続いて、量子細線や量子箱など立体量子マイクロ構造の物性上の特色と期待されるデバイス上の機能を紹介し、併せてそれらの構造をエピタキシャル成長を用いて作る研究の現状と課題について述べる小特集　材料複合化による新機能の創製departmental bulletin pape

Robust-control using model-error-feedback CDOB and DOB under variable-time-delay

This paper presents the robustness improvement of the Communication-Disturbance-OBserver (CDOB) based on Lyapunov-Krasovskii functional(LKF), and proposes the Network-based-Control-System (NCS) using the LKF based CDOB and a local-side DOB. The CDOB is a compensation method for a output signal includes a communication delay. By using LKF, a steady-state output-estimation-error of the CDOB under variable time-delay and parameter-perturbations is suppressed. However, the latest studies have not shown the robustness to the disturbance-input. In this paper, the frequency- weight of CDOB to the disturbance is introduced to the design of the LKF based CDOB, to suppress the error. From a calculated error-characteristic and a numerical simulation, the account of the weight is validated. Additionally, implementing a disturbance observer in the local (controlled object) side, the robustness of the NCS is improved much in the numerical simulation.journal articl

監査概念純化のための一考察

application/pdfdepartmental bulletin pape

福祉のモデル化・再訪 : 東アジア福祉レジームの場合

departmental bulletin pape

Long Term Outcomes Following Hospital Admission for Sepsis Using Relative Survival Analysis: A Prospective Cohort Study of 1,092 Patients with 5 Year Follow Up - Figure 1

<p>a. Kaplan-Meier crude survival estimates by age group for all sepsis patients (n = 1,028). b. Kaplan-Meier crude survival estimates by age group for severe sepsis patients (n = 228).</p

Long Term Outcomes Following Hospital Admission for Sepsis Using Relative Survival Analysis: A Prospective Cohort Study of 1,092 Patients with 5 Year Follow Up - Figure 2

<p>a. Cumulative relative survival for patients with sepsis and severe sepsis, compared with a reference population. Dotted lines represent 95% confidence intervals. b. Cumulative relative survival for only patients with severe sepsis (n = 228), compared with a reference population. Dotted lines represent 95% confidence intervals.</p