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9th International Conference on Informatics in Control, Automation and Robotics, ICINCO 2012

作者： Okatsuka, Hisashi Shibuya, Ryota Terashima, Kazuhiko Noda, Yoshiyuki Matsuo, Yoshiki Department of Mechanical Engineering Toyohashi University of Technology Hibarigaoka 1-1 Tempaku Toyohashi Aichi 441-8580 Japan Department of Mechanical System Engineering Faculty of Engineering University of Yamanashi Takeda 4-4-37 Kofu Yamanashi 440-0016 Japan Department of Computer Siecnce Tokyo University of Technology 1404-1 Katakuramachi Hachioji City Tokyo 192-0982 Japan

ISBN: (纸本)9789898565211

This paper presents sloshing suppression control of liquid transferred at a desirable-speed. In order to suppress sloshing, a mathematical model consisting of continuous equations and the pressure equation is used and the sloshing phenomena are analyzed by using the Boundary Element Method (BEM). Further, the BEM model is transformed into the state-variable model. The proposed model can estimate not only first-order mode sloshing but also higher-order mode sloshing and predict the future behavior of liquid level more precisely. Moreover, sloshing is suppressed by using Model Predictive Control (MPC).We were able to transfer the container while minimizing sloshing and maintaining a desirable speed.

关键词： Boundary element method

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An optimization procedure for the friction stir welding FEM model of corner fillet joints

An optimization procedure for the friction stir welding FEM ...

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14th International Conference on Metal Forming, METAL FORMING 2012

作者： Buffa, Gianluca Fratini, Livan Ingarao, Giuseppe Di Lorenzo, Rosa Arregi, Bernaitz Luz Penalva, Mari University of Palermo Department of Dept. of Chemical Management Computer Science and Mechanical Engineering Viale delle Scienze 90100 Palermo Italy Industrial System Unit - Production System Department Fundación Tecnalia Research and Innovation Paseo Mikeletegi 7 - Parque Tecnológico E-20009 Donostia - San Sebastián Spain

ISBN: (纸本)9783514007970

Friction stir welding (FSW) is an energy efficient and environmentally "friendly" (no fumes, noise, or sparks) welding process, during which the sheets are welded together in a solid-state joining process. FSW is mature for simple configurations but a significant lack of knowledge is found when dealing with different designs such as T-sections, box sections and corner welds. Although the latter joint morphology has traditionally been considered unfeasible for the process, it seems to have a great potential to be used also for T-joint configurations, a recurrent design pattern in transport applications. A specific tool has been developed and a set of experimental welds has been produced with it. In this paper, experimentally measured and numerically calculated thermal histories were compared and a response surface approach was applied in order to model the behavior of the error functions taken into account. Once the conflicting trend of the selected indicators was observed, a constrained minimization approach was developed. The numerical results, obtained utilizing the numerical parameters from the optimization procedure, showed a very good matching with the experimental evidence. According to the obtained results, the proposed model is able to represent a useful design tool for the process. © 2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

关键词： Friction stir welding

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On iterative liveness-enforcement for a class of generalized Petri nets

On iterative liveness-enforcement for a class of generalized...

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2012 IEEE International Conference on Automation Science and engineering: Green Automation Toward a Sustainable Society, CASE 2012

作者： Hou, Yifan Liu, Ding Zhou, Mengchu School of Electro-Mechanical Engineering Xidian University No. 2 South Taibai Road Xi'an 710071 China Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07102 United States Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 200092 China

ISBN: (纸本)9781467304283

This work presents an iterative liveness-enforcing method for a class of generalized Petri nets, which can model flexible manufacturing systems. The proposed method checks the liveness of net models using mixed integer programming and controls the token allocations of resource places instead of siphons using a liveness and resource usage ratio-enforcing supervisor. The enumeration of a kind of special structures, which is required in the previous work, is avoided and the number of iterations is bounded by the number of shared resource places in the net model. All strict minimal siphons in the controlled systems are minimally controlled. Several explanatory examples are used to illustrate this method. © 2012 IEEE.

关键词： Petri nets

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Ride comfort performance of electric vehicle conversion with active suspension system

Ride comfort performance of electric vehicle conversion with...

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2012 51st Annual Conference on of the Society of Instrument and Control Engineers of Japan, SICE 2012

作者： Bakar, Saiful Anuar Abu Masuda, Ryosuke Hashimoto, Hiromu Inaba, Takeshi Jamaluddin, Hishamuddin Rahman, Roslan Abd. Samin, Pakharuddin Mohd. Department of Applied Computer Engineering 4-1-1 Kitakaname Hiratsuka City Kanagawa Prefecture 259-1292 Japan Department of Mechanical Engineering Tokai University 4-1-1 Kitaname Hiratsuka City Kanagawa Prefecture 259-1292 Japan Department of System Dynamics and Control Universiti Teknologi Malaysia 81310 Johor Malaysia

ISBN: (纸本)9781467322591

This paper presents the investigation on the performance of active suspension system in the electric vehicle (EV) conversion, controlled by the stability augmentation system algorithm [9] and a newly proposed SAS-Skyhook algorithm. The evaluations were done using a validated 7-degrees-freedom (7DOF) of vehicle's ride model. The mathematical modelling of the vehicle model is described. A worst case scenario of random road profiles was considered to evaluate the performance of the active suspension system. The method of subjecting the random road profiles input is also described. It was found that in general, the active suspension improved the EV conversion's ride comfort performance significantly, compared to the passive suspension system. In terms of the comparison between the active suspension system controlled by the SAS and SAS-Skyhook algorithms, the ride comfort performance provided by the SAS-Skyhook algorithm is the most significant. © 2012 SICE.

关键词： Active suspension systems

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A Hardware-In-the-Loop Simulation and Test for Unmanned Ground Vehicle on Indoor Environment

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Procedia engineering 2012年 29卷 3904-3908页

作者： Khalid bin Hasnan Luhur Budi Saesar Tutut Herawan Faculty of Mechanical and Manufacturing Engineering University Tun Hussein onn Malaysia Parit Raja 86400 Johor Malaysia Faculty of Computer System and Software Engineering University Malaysia Pahang Gambang26300 Pahang Malaysia

In this paper, we present an alternative approach for analyzing performance and monitoring of unmanned ground vehicle (UGV) through a Hardware-in-the-loop (HIL) simulation. This approach is started by defined a mathematical model of kinematic-dynamic forces apply and sensor-actuator model that integrated in UGV for simulation. A novel hardware control architecture was built to meet the HIL simulation method. Both simulation model and hardware configurations are provided by MATLAB/simulink toolboxes. To verify the HIL system, 2 small fields was built for the real test. Moreover 3D virtual model of UGV and the environment test field was developed to ease the system monitoring. Finally from the tracking system, results show that the HIL simulation method combined with the real environment produce more information of parameter that influenced during the tests given.

关键词： Hardware-in-the-loop Simulation Simulink Unmanned Vehicle Telemetry Visualization

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On iterative liveness-enforcement for a class of generalized Petri nets

On iterative liveness-enforcement for a class of generalized...

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IEEE International Conference on Automation Science and engineering (CASE)

作者： YiFan Hou Ding Liu MengChu Zhou School of Electro-Mechanical Engineering Xidian University Xian China Key Laboratory of Embedded System and Service Computer Ministry of Education Tongji University Shanghai China Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ USA

关键词： Monitoring Petri nets Iterative methods system recovery Educational institutions Resource management Vectors

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JOMS:system Architecture for Telemetry and Visualization on Unmanned Vehicle

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Procedia engineering 2012年 29卷 3899-3903页

作者： Khalid bin Hasnan Luhur Budi Saesar M.S. Ikhmatiar Tutut Herawan Faculty of Mechanical and Manufacturing Engineering University Tun Hussein onn Malaysia Parit Raja 86400 Johor Malaysia Faculty of Computer Science and Information Technology University Tun Hussein onn Malaysia Parit Raja 86400 Johor Malaysia Faculty of Computer System and Software Engineering University Malaysia Pahang Gambang 26300 Pahang Malaysia

This paper suggest a different way to get telemetry and visualization data from unmanned vehicle. A simple system architecture called JOMS (JOystick Modified system) is proposed to get those data. With the help of joystick, RC controller and simulink toolbox from MATLAB, the information from unmanned vehicle that associated with rotary and moving principle could be translated into useful data from the unmanned vehicle. Here, potentiometer from the joystick that acts as a variable resistor has been modified. The signals from joystick that interfaced on simulink are processed with some applied mathematical calibration regarding the functionality for certain condition of unmanned vehicle. To verify, the system module has been integrated both on unmanned ground vehicle (UGV) and unmanned air vehicle (UAV) for testing. Moreover, 3D virtual model was developed to ease the unmanned vehicle operator. Finally JOMS, the system architecture proposed successfully suggest a different way to get telemetry and visualization data from unmanned vehicle.

关键词： Joystick Simulink Potentiometer Unmanned Vehicle UAV UGV Telemetry Visualization

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Maximally permissive control of flexible manufacturing systems with fewest disjunctive constraints

Maximally permissive control of flexible manufacturing syste...

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2012 International Conference onAdvanced Mechatronic systems, ICAMechS 2012

作者： Chen, YuFeng Zhou, MengChu Li, XiaoOu School of Electro-Mechanical Engineering Xidian University Xi'an 710071 China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 200092 China Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07102 United States Departamento de Computación CINVESTAV-IPN Av. IPN 2508 Col. Zacatenco México DF C.P. 07360 Mexico

ISBN: (纸本)9780955529382

For Petri net models whose legal reachability spaces are non-convex, one cannot optimally control them by the conjunctions of linear constraints. This work proposes a method to find a set of linear constraints such that each constraint can forbid all first-met bad markings and every legal marking satisfies at least one constraint. Then, the disjunctions of the obtained constraints can make all legal markings reachable and forbid all first-met bad markings, i.e., the controlled net is live and maximally permissive. The work also develops an integer linear programming model to minimize the number of the constraints. Finally, an example is provided to illustrate the proposed method. © 2012 Intl Jrnal Advanced Mech.

关键词： Flexible manufacturing systems

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Petri net-based scheduling analysis of dual-arm cluster tools with wafer revisiting

Petri net-based scheduling analysis of dual-arm cluster tool...

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IEEE International Conference on Automation Science and engineering (CASE)

作者： Yan Qiao NaiQi Wu MengChu Zhou Department of Industrial Engineering School of Electro-Mechanical Engineering Guangdong University of Technology Guangzhou China The Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ USA

With wafer revisit, it is complicated to schedule cluster tools in semiconductor fabrication. In wafer fabrication processes, such as atomic layer deposition (ALD), the wafers need to visit some process modules for a number of times. The existing swap-based strategy can be used to operate a dual-arm cluster tool for such a process. It results in a 3-wafer cyclic schedule. However, it is not optimal in the sense of cycle time. Thus, to search for a better schedule, a Petri net model is developed for a dual-arm cluster tool with wafer revisit. With it, the properties of the 3-wafer schedule are analyzed. It is found that, to improve the performance, it is necessary to reduce the number of wafers completed in a cycle. Thus, a 1-wafer schedule is developed by using a new swap-based strategy.

关键词： Robots Schedules Semiconductor device modeling Firing Steady-state Load modeling Transient analysis

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Physically based simulation of solid objects' burning

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2012年 7145 LNCS卷 110-120页

作者： Liu, Shiguang An, Tai Gong, Zheng Hagiwara, Ichiro School of Computer Science and Technology Tianjin University Tianjin 300072 China State Key Lab of Virtual Reality Technology and System Beihang University Beijing 100191 China Department of Mechanical Science and Engineering Tokyo Institute of Technology Tokyo 152-8550 Japan

ISBN: (纸本)9783642290497

This paper presents a novel method for realistic simulation of solid objects' burning. The temperature field is first constructed based on combustion theories. Then, a temperature field motivated interaction model (TFMI) is proposed to simulate the interactions between the fire and the objects during burning. In TFMI, the decomposition of the objects is modeled by improving the level set method and the spreading of fire is calculated using the updated temperature field at each time step. Our method can deal with varied topologies of different objects during burning. The fire is simulated by adopting stable fluid method and integrated into the whole burning scenes. Finally, various solid objects' burning scenes are rendered automatically using the above model. The experiment results show the validity of our method. © 2012 Springer-Verlag Berlin Heidelberg.

关键词： Temperature

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