著者
Yoshihiro SEJIMA Tomio WATANABE Mitsuru JINDAI
出版者
The Japan Society of Mechanical Engineers
雑誌
Journal of Advanced Mechanical Design, Systems, and Manufacturing (ISSN:18813054)
巻号頁・発行日
vol.10, no.9, pp.JAMDSM0103, 2016 (Released:2016-11-09)
参考文献数
21
被引用文献数
1

In human interaction and communication, not only verbal messages but also nonverbal behavior such as nodding and paralanguage are rhythmically related and mutually synchronized among speakers. This synchrony of embodied rhythms unconsciously enhances a sense of unification and causes an interaction-activated communication in which nonverbal behaviors such as body movements and speech activity increase, and the embodied interaction is activated. In this paper, we propose the concept of an estimation model of interaction-activated communication based on the heat conduction equation with the characteristics of precipitous speed fluctuation and develop a model that estimates the degree of interaction-activated communication by using speech input only. Further, we evaluate the developed model in estimating the period of the interaction-activated communication in an avatar-mediated communication. The results demonstrate that the developed model is effective in estimating the interaction-activated communication.
著者
Masaharu KOMORI Kippei MATSUDA Tatsuro TERAKAWA Fumi TAKEOKA Hideaki NISHIHARA Hiroo OHASHI
出版者
The Japan Society of Mechanical Engineers
雑誌
Journal of Advanced Mechanical Design, Systems, and Manufacturing (ISSN:18813054)
巻号頁・発行日
vol.10, no.6, pp.JAMDSM0086, 2016 (Released:2016-10-24)
参考文献数
31
被引用文献数
6 8

A transportation vehicle or mobile robot that can move to a target location in an arbitrary direction on the floor is important to ensure that work can proceed quickly and effectively in a limited space. To move in an arbitrary direction, conventional methods such as omni wheels have free rollers along the outer circumference of the wheel that can rotate passively. However, the conventional methods are difficult to control precisely because of the rotational resistance of the free rollers. In addition, the direction that the conventional methods can move actively by themselves is limited. This paper proposes a novel mechanism called the active omni wheel, which is able to actively move in an arbitrary direction by using only one wheel unit. The active omni wheel is composed of a main body and outer rollers arranged around the outer circumference of the wheel. By using a differential gear mechanism, the active omni wheel enables active rotation of not only the main body of the wheel but also the outer rollers. The theoretical equation of motion of the active omni wheel is clarified to control the wheel. An omnidirectional vehicle using the active omni wheel is discussed. The appropriate arrangement of wheels that enables the omnidirectional vehicle to move actively in arbitrary directions by using the active omni wheel is shown and the motion theory is constructed. This paper also discusses the structure appropriate for the vehicle using the active omni wheel, including the arrangement of input shafts, the structure supporting the wheels, the main body of the vehicle, and its suspension. The active omni wheel and omnidirectional vehicle were designed and manufactured. Experiments conducted on the manufactured vehicle verify the effectiveness of the active omni wheel and the omnidirectional vehicle.
著者
Vitor Mitsuo FUKUSHIGUE HAMA Wei WU Mutsunori YAGIURA
出版者
The Japan Society of Mechanical Engineers
雑誌
Journal of Advanced Mechanical Design, Systems, and Manufacturing (ISSN:18813054)
巻号頁・発行日
vol.12, no.3, pp.JAMDSM0072, 2018 (Released:2018-07-20)
参考文献数
29

The overall planning process undertaken by a bus company is traditionally composed of five sub-processes: timetabling, vehicle scheduling, maintenance scheduling, crew scheduling, and crew rostering. Solving the full optimization problem is believed to be computationally intractable, and therefore in practice the five sub-processes are usually optimized in sequence. In this paper, we present a model that integrates the problems of vehicle scheduling and maintenance scheduling. The objective is to minimize the differences in mileage between buses, the total distance traveled, and the daily differences in the number of maintenance tasks. We propose a heuristic algorithm using the framework of greedy randomized adaptive search procedure (GRASP), and we improve the neighborhood search procedure by using an ordered list of possible trips. We compare the neighborhood search procedure with and without this mechanism and show that the ordered list reduces the number of neighbors to be checked by more than 95%, and it reduces the time to obtain solutions of the same or better quality by an average of 70%. Through computational experiments on instances generated from real-world data, we show that the proposed algorithm finds solutions that are as good as or better than those obtained by a commercial solver in less than 5% of the time required by the latter.
著者
Yuki KINOSHITA Tetsuo YAMADA Surendra M. GUPTA Aya ISHIGAKI Masato INOUE
出版者
一般社団法人 日本機械学会
雑誌
Journal of Advanced Mechanical Design, Systems, and Manufacturing (ISSN:18813054)
巻号頁・発行日
vol.10, no.3, pp.JAMDSM0052-JAMDSM0052, 2016 (Released:2016-07-01)
参考文献数
22
被引用文献数
6

For green supply chains, it is essential to disassemble and recycle end-of-life (EOL) assembled products for material circulation. In order to establish disassembly plants environmentally friendly and economical manner, a disassembly parts selection is often carried out. Each part has a different recycling rate and cost, and all parts have precedence relationships among disassembly tasks. Igarashi et al. (2014) [International Journal of Industrial Engineering and Management Systems, Vol.13, No.1, pp.52-66] proposed a disassembly parts selection method that is carried out in an environmentally friendly and economical manner with non-destructive or destructive disassembly with integer programming with ε constraint. However, calculated efforts are required to achieve optimum solutions for the ε constraint method. On the other hand, goal programming is well known as an effective way to solve multi-criteria decision-making problems. This study proposes a bi-objective disassembly parts selection with recycling rate and cost using goal programming, and analyzes multiple types of EOL assembled products and disassembly parts selection. First, an environmentally friendly and economical disassembly parts selection is addressed using a 3D-CAD and Recyclability Evaluation Method (REM) developed by Hitachi Ltd. Next, the environmentally friendly and economical disassembly parts selection is formulated with goal programming. Finally, a case study is quantitatively discussed by comparing different types of assembled products and goal programming parameters. It is demonstrated that the proposal method by goal programming in this study finds the same solutions with the lower number of numerical experiments as that with the ε constraint method.
著者
Yoshitaka NAKAO Hiroshi NAGAMOCHI
出版者
一般社団法人 日本機械学会
雑誌
Journal of Advanced Mechanical Design, Systems, and Manufacturing (ISSN:18813054)
巻号頁・発行日
vol.1, no.2, pp.217-226, 2007 (Released:2007-04-27)
参考文献数
12
被引用文献数
2 11

We consider a discrete-type split delivery vehicle routing problem, in which delivery goods for a customer consist of a set of items, each item is required to be serviced by exactly one vehicle, and each customer is allowed to be visited more than once. In this paper, we propose a fast algorithm that constructs a set of routes one by one without any improvement procedures. The algorithm generates routes by dynamic programming based on an elaborate route evaluation function that estimates the total travel cost required to service all the remaining items by vehicles. Experimental results on real-world instances are reported.
著者
Hiroaki T.-KANEKIYO Shinjiro AGATA
出版者
The Japan Society of Mechanical Engineers
雑誌
Journal of Advanced Mechanical Design, Systems, and Manufacturing (ISSN:18813054)
巻号頁・発行日
vol.13, no.1, pp.JAMDSM0008, 2019 (Released:2019-01-23)
参考文献数
19

An inventory management problem is theoretically discussed for a factory having effects of lead times in replenishing the inventory, where it stocks materials used for its products. It is assumed that the factory can dynamically control the size of ordering materials. By applying the stochastic control theory, the optimal control of the ordering size is derived, in which the expected total cost up to an expiration time is minimized. First, a new stochastic model is constructed for describing an inventory fluctuation of the factory by the use of a non-diffusive stochastic differential equation, where an analytic time is introduced so that the inventory process can be a Markov process even though it is affected by lead times. Next, an optimal control is formulated by introducing an evaluation function quantifying total costs. Based upon them, the Hamilton-Jacobi-Bellman (HJB) equation is derived, whose solution gives the optimal control. Finally, the optimal control is quantitatively examined through numerical solutions of the HJB equation. Numerical results indicate that if time up to an expiration time is short then the optimal control is affected by it, otherwise, the optimal control does not depend on it.
著者
Hideyoshi YANAGISAWA Chihiro MIYAZAKI
出版者
The Japan Society of Mechanical Engineers
雑誌
Journal of Advanced Mechanical Design, Systems, and Manufacturing (ISSN:18813054)
巻号頁・発行日
vol.13, no.1, pp.JAMDSM0013, 2019 (Released:2019-02-18)
参考文献数
26

The study proposes a methodology for extracting and applying expectation effect in multisensory user-product interaction to balance the design attributes that satisfy must-be and attractive qualities in the Kano model. Satisfying both qualities is assumed to be an objective of product design. This study modeled users' cognitive process of cyclic user-product interactions. Using the model, the proposed method extracts users' cognitive structure and state transitions while interacting with a product. The cognitive structure reveals the design attributes affecting must-be and attractive qualities as well as prior cue of the expectations of these qualities. Tolerance for design attributes to satisfy both qualities and the expectation effect of prior factors are discussed. The methodology is validated using a hair dryer as a case product. Another case product (camera) demonstrates how cognitive cues work as well as sensory cues as expectation effect. The proposed methodology supports designers and researchers in structuring multisensory user-product interactions as a series of state transitions of users' cognitive model. The structure helps to extract product attributes that affect both attractive and must-be perceived qualities and attributes involving expectation effect on product qualities. The method of experiment 1 can be applied to assess tolerance for product attributes to satisfy perceived qualities. The method of experiment 2 can be applied to assess the effect of prior expectation induced by both sensory and cognitive attributes, such as a product class, on perceived quality.
著者
Soichiro YOKOYAMA Hiroyuki IIZUKA Masahito YAMAMOTO
出版者
一般社団法人 日本機械学会
雑誌
Journal of Advanced Mechanical Design, Systems, and Manufacturing (ISSN:18813054)
巻号頁・発行日
vol.8, no.5, pp.JAMDSM0073-JAMDSM0073, 2014 (Released:2014-10-31)
参考文献数
19

We propose an efficient heuristic method for job-shop scheduling problems (JSP) with the objective of total weighted tardiness minimization. The proposed method uses schedule reconstructions by priority rules to guide a local search towards promising solutions. Typically priority rules determine the whole schedule and thus in corporating it with local search procedure is difficult. In our proposed method, a priority rule decides a schedule within an arbitrary selected time window and the rest of the schedule is determined by the schedule obtained by a conventional local search method. The priority rule is given by a linear combination of simple priority rules. To improve a schedule efficiently, an appropriate set of time window and gains of the linear combined priority rule is required. Therefore, we optimize the set of time window and rule gains with genetic algorithm. This rule-based reconstruction procedure and the conventional local search procedure are alternately applied to a current solution. In the experiments, the efficiency of rule-based reconstruction procedure is verified and the proposed method is compared with one of the most effective existing methods. The results show that the proposed method outperforms the existing method on large problems with sufficient computational time. The average performance is particularly improved due to the ability of rule-based reconstruction procedure to escape from local optima of the conventional local search procedure efficiently.
著者
Qingrong FAN Kiyotaka IKEJO Kazuteru NAGAMURA Masato KAWADA Mitsuo HASHIMOTO
出版者
一般社団法人 日本機械学会
雑誌
Journal of Advanced Mechanical Design, Systems, and Manufacturing (ISSN:18813054)
巻号頁・発行日
vol.8, no.3, pp.JAMDSM0021-JAMDSM0021, 2014 (Released:2014-07-22)
参考文献数
23
被引用文献数
1 7

The operation status of gear device can directly affect the working conditions of the whole machine system. Thus, it is crucial to detect the gear damage as early as possible to prevent the system from malfunction. This paper proposes an intelligent diagnosis method for gear damage using multiple classifiers of support vector machines with extracted failure feature vector. The vibration signal of gear box is employed as the analytical data in this paper. In order to illustrate the representative characters of gear conditions, statistical parameters and characteristic amplitude ratios of frequency bands are extracted from the vibration signals in time-domain and frequency-domain respectively, which are served as failure feature vector for the following diagnosis. Moreover, to reduce the dimensions of the failure feature vector, the technology of principal component analysis is adopted to transform the original failure feature vector into a new smaller set of variables as inputs to classifiers of support vector machines. In order to classify different types of gears, multiple classifiers of support vector machines based on the binary tree are designed. The validity of this approach is investigated by the experiment. Three kinds of gears, namely normal gear, spot damaged gear and pitted gear, are tested on the power circulating type gear testing machine. The vibration accelerations of gear box are measured as original data. Most of the samples are correctly classified by the provided method, which demonstrates the effectiveness of the proposed method on the application of gear damage diagnosis.
著者
Dinh Quang TRUONG Kyoung Kwan AHN Le Duy KHOA Do Hoang THINH
出版者
一般社団法人 日本機械学会
雑誌
Journal of Advanced Mechanical Design, Systems, and Manufacturing (ISSN:18813054)
巻号頁・発行日
vol.6, no.2, pp.236-251, 2012 (Released:2012-02-13)
参考文献数
14
被引用文献数
2

This paper develops a newly bicycle concept named smart bicycle (SBIC) with automatic transmission and energy recuperating ability. The SBIC operation is based on a hydrostatic transmission (HST). Several HST designs have been proposed. Moreover, a use of energy converting and storing devices is an optional design for the SBIC to recovery energy during the deceleration or going downhill process, and to support this energy to the hydraulic system during the acceleration or going uphill process. The working efficiency of the bicycle is then increased and could become competitive with the roller-chain technology. Simulations have been carried out to evaluate the working performances of the proposed SBIC concepts.