著者

伊藤 景視 上野 哲

出版者

一般社団法人 日本機械学会

雑誌

「運動と振動の制御」シンポジウム講演論文集 2015.14 (ISSN:24243000)

巻号頁・発行日

pp.277-280, 2015-06-22 (Released:2017-06-19)

---

This study expresses a novel active vibration control method for a house structure by using magnetic levitation. The magnetic levitation system is easy to install to the ceiling because there is no need to use linear guides or bearings. In this study, a magnetic levitation device is attached to the iron plate fixed firmly to ceiling of the structure and it will levitate when a vibration occurs. The total mass of structure will be decreased while levitating, resulting in the change of its natural frequency. Moreover, an efficient vibration control method is examined. Finally the results of experiments are shown to confirm its feasibility.

著者

松本 茂樹 吉田 勝俊

出版者

一般社団法人 日本機械学会

雑誌

「運動と振動の制御」シンポジウム講演論文集 2015.14 (ISSN:24243000)

巻号頁・発行日

pp.360-365, 2015-06-22 (Released:2017-06-19)

---

In this study, we conduct experiments of human balancing task and present a stochastic dynamic model of the human balancing task. The parameters of the stochastic dynamic model are identified using particle swarm optimizers. Tn order to examine stochastic behavior of the human balancing, we experimentally estimate probability density function of the state quantities. The experimental result implies that the behavior of the human balance seems to be fat-tailed distribution. This experimental observation was reproduced by the model that has additive and multiplicative white Gaussian noise. This work has implications for designing human-like motions of artificial agents such as human-like partner robots.

著者

金澤 恵里 五十嵐 大貴 阿部 修 築地 徹浩 安永 和敏

出版者

一般社団法人 日本機械学会

雑誌

「運動と振動の制御」シンポジウム講演論文集 2013.13 (ISSN:24243000)

巻号頁・発行日

pp._C27-1_-_C27-10_, 2013-08-25 (Released:2017-06-19)

---

Manifold blocks are recently used to connect hydraulic components in a hydraulic system that has flow channel inside. They are useful in reducing the size and weight of hydraulic systems. This paper deals with solid manifold block and laminated manifold block as trip equipment with which the turbine of a thermal power or a nuclear power plant is equipped. They are different from machining. We investigate pressure drops of their pipe flow with computational fluid dynamics (CFD) and compare the two types. We devised the new technique of having included CFD in pipeline network calculation. The final purpose is to design a laminated manifold block as trip equipment with which reduction in size and weight or reduction in pressure drops is realized. The conclusions from the aforementioned results are as follows. First, Branch/junction model can be calculated by the new technique of having included CFD in pipeline network calculation. Second, we achieved designing of a laminated manifold block as trip equipment with which reduction in size and weight or reduction in pressure drops is realized.

著者

川井田 康礼 中浦 茂樹 大畠 龍介 三平 満司

出版者

一般社団法人 日本機械学会

雑誌

「運動と振動の制御」シンポジウム講演論文集 2003.8 (ISSN:24243000)

巻号頁・発行日

pp.540-545, 2003-10-30 (Released:2017-06-19)

---

Devil stick is a kind of juggling as to control a floating stick (the center stick) by hitting or pushing with other sticks (the hand sticks). Various stick motions are performed by jugglers and some of them are studied as control problem. The purpose of this paper is to rotate the center stick by only pushing with one hand stick. In other word, control objective is to maintain the position and the angular velocity of the center stick. The control strategy in this paper is as follows. To begin with, some states are controlled by output zeroing control. The output function is derived from observing the motion of good jugglers. But there are two problems in this strategy. First, since the attitude angle of the center stick is in unobservable subspace, the angular velocity can't be controlled. Secondly, the direction of the input force isn't considered. For the first problem, by solving equations of the zero dynamics, it turns out that it is possible to stabilize the angular velocity by changing the contact point of the center stick and the hand stick. For the second one, the analytical result shows that the required force depends on the angular velocity. Some numerical simulations show the usefulness of the proposed strategy.