著者

武田 行生 舟橋 宏明 中嶋 一貴

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.65, no.630, pp.844-849, 1999-02-25

被引用文献数

6

---

This paper proposes a new index for performance evaluation of robotic manipulators from the point of view of high speed positioning. The proposed index is defined by the ratio of the positioning time realized by a manipulator for a set of starting position and desired position under a certain load condition and the minimum positioning time which is determined by the capacity of the actuators equipped with the manipulator. The results of computer simulations and experiments of evalution of the spatial inparallel actuated manipulator with six degrees of freedom developed by the authors have been presented. Comparisons of the proposed index with the transmission index and the adept motion cycly time have been presented. Through these results, effectiveness of the proposed index has been clarified.

著者

樋口 勝 舟橋 宏明 武田 行生

出版者

一般社団法人 日本機械学会

雑誌

機素潤滑設計部門講演会講演論文集

巻号頁・発行日

vol.2001, pp.139-140, 2001

---

We have already proposed a disk brake for robotic use in which the braking torque is generated both by PZT-actuator and solenoid. The action of the solenoid is transmitted to friction pads through a wedge mechanism. In order to make clear the relation between manufacturing accuracy and application force of the brake, dynamic simulations and experiments have been carried out. And the result of this analysis has been utilized in designing a small and light brake.

著者

松田 聡一郎 松浦 大輔 菅原 雄介 武田 行生

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.854, pp.17-00282-17-00282, 2017 (Released:2017-10-25)

参考文献数

17

被引用文献数

2

---

In order to improve living space for stable walks by elderly people, this paper discussed assessment of living space with unique-shaped support objects. Four evaluation indices expressing capability of balance recovery corresponding to the support object were derived based on directionality of generative force by human's upper extremity and directionality of reaction force depending on surface shapes of the objects. Experiments were carried out to (1) obtain the parameters necessary to calculate the proposed indices and (2) carry out organoleptic evaluation of the support objects. Compared to the results obtained in these experiments (1) and (2), effects of the proposed indices were discussed, and an effective index among the four for evaluating the effect of the support objects was clarified. Assessment of a support object using the index was shown as an example.

著者

小俣 正輝 武田 行生 ツォイ ユン ホー

出版者

一般社団法人日本機械学会

雑誌

機素潤滑設計部門講演会講演論文集 (ISSN:13483919)

巻号頁・発行日

vol.2010, no.10, pp.181-182, 2010-04-18

---

This paper presents the peg-in-hole task by a position-orientation decoupled parallel manipulator. This manipulator can achieve fast and accurate positioning and fine orientation adjustment of the platform. In order to enable the peg-in-hole task by this manipulator without force sensor on the platform for reduction of cost and moving mass, impedance control system with estimation of external force on the platform by measuring motor torque has been constructed. Controller design taking into account the allowable limit of position error and contact force has been presented. Experimental result of peg-in-hole task illustrates that the proposed impedance control system was properly designed.

著者

武田 行生 舟橋 宏明

出版者

一般社団法人日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.59, no.560, pp.p1142-1147, 1993-04

被引用文献数

8

---

When all input links, except one, are fixed in a mechanism of parallel manipulator with N degrees of freedom (dof), N kinds of mechanisms with a single dof can be obtained, and pressure angles corresponding to each mechanism can be defined. In order to transmit power efficiently from input links to the output link, all of the values of cosines of the pressure angles must be as big as possible. Then, the present paper proposes a new transmission index (TI) for parallel manipulators based on the power transmitted from input links to the output link, which is defined as the minimum value of cosines of the pressure angles. For planar and spatial parallel manipulators, static force analyses are carried out, and the relationships between TI and joint forces are studied. Working spaces of parallel manipulators with consideration of motion transmissibility are also shown.

著者

武田 行生 舟橋 宏明 村松 伸幸

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.62, no.599, pp.2920-2926, 1996-07-25

被引用文献数

2

---

This paper proposes an architecture of a planar in-parallel actuated manipulator with three degrees of freedom which is composed of the positional mechanism and the orientational chain. Kinematic synthesis is carried out to maximize the practically dextrous working space (PD working space) in which motion transmissibility is excellent and any orientatinon angle of the output link can be obtained. The size of working space and range of output orientation of the synthesized mechanism are compared to those of the mechanisms in the literature, and the results show that the synthesized mechanism has a large PD working space.