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Improvements on Interpolation Techniques based on Linear programming for Constrained Control

IFAC-PapersOnLine 2017年第1期50卷 1403-1408页

作者： Rubin D. Mercader P. Nguyen H.-N. Gutman P.-O. Baños A. Autonomous Systems Program Technion – Israel Institute of Technology Haifa Israel Department of Computer and System Engineering University of Murcia Murcia Spain Control Signal and System Department IFP Energies Nouvelles Lyon France Faculty of Civil and Environmental Engineering Technion – Israel Institute of Technology Haifa Israel

We present some improvements on interpolation based control (IC) for linear discrete-time systems with polyhedral constraints on the control and the states variables. The plant may be uncertain, time-varying, and subject to bounded disturbances. Roughly speaking, IC approach is based on the interpolation between an inner and an outer controller. The extension presented here is twofold. On the one hand, the IC approach is extended to deal with higher order inner controllers, making it e.g. possible to incorporate integral action in a vicinity of the origin. On the other hand, this paper presents a modification that better exploits the control signal range. As with previous IC strategies, the presented method demands relatively low online computational resources, and is applicable also to uncertain plants. The benefits of the improved scheme are illustrated in some examples. © 2017

关键词： Constrained control Linear programing Model predictive optimization-based control Robust control Time-varying systems

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RESEARCH ON STABILITY OF CRAWLER system FOR DEEP SEA ROV

RESEARCH ON STABILITY OF CRAWLER SYSTEM FOR DEEP SEA ROV

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28th International Conference on Ocean, Offshore and Arctic engineering (OMAE)

作者： Inoue, Tomoya Katsui, Tokihiro Murakami, Hisataka Tahara, Junichiro Advanced Marine Technology Research Program JAMSTEC (Japan Agency for Marine-Earth Science and Technology) Japan Department of Marine System Engineering Osaka Prefecture University Japan Graduate School of Engineering Osaka Prefecture University Japan

ISBN: (纸本)9780791843444

A deep sea ROV is desired to be light from the viewpoints of reducing a tension on an underwater cable and possessing the adequate movability by thrusters in water. On the other hand, when moving by a crawler system on the seabed, such a lightweight will influence on its movability characteristics. As an initial investigation experiments using an actual ROV were conducted in a water tank. And it was observed that the ROV ran in wheelie in some cases and almost fell down in extreme case in spite of the fact that it could run stably on land. In order to clarify the results fundamental theory of stability of the ROV in steady running is presented. The theory gives the discriminant chart of stable running for the combination of the center of gravity and the center of buoyancy. Experiments using a model were conducted to verify the theory. In order to increase the stable area and also to change meaningly the center of gravity, this paper proposes a method to virtually increase the weight and to change the center of gravity by using thrusters. And preliminary experiments were conducted to confirm its advantageous effect.

关键词： Water tanks

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Aloe vera and beeswax based coating to maintain shelf life of salak cv. Madu 3

Aloe vera and beeswax based coating to maintain shelf life o...

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3rd International Conference on Agricultural engineering for Sustainable Agriculture Production, AESAP 2019

作者： Sari, P.R.P. Darmawati, E. Ahmad, U. Postharvest Technology Master Program Graduate School Ipb University Bogor16680 Indonesia Departement of Mechanical Engineering and Bio-system Faculty of Agricultural Engineering and Technology Ipb University 16680 Indonesia

The coatings on fruits after harvested was applied to maintain the appearance and quality up to the consumer's hands. This study aimed to maintain color and reduce the level of decay of salak madu during storage. Salak madu was obtained from Madding Fresh, trader and supplier salak from Sleman, Yogyakarta. The salak was coated with Aloe vera gel (20% and 50%) and beeswax (3, 6, and 10%). All samples were stored at 25-28 °C. The parameters used to measure the effect of treatment are skin color, percentage of decay, and weight loss. Observations were carried out for 12 days. The results of this study were found that dyeing on a coating made from Aloe vera 50% was able to slow down weight loss and percentage of decay until the 6 days, while Aloe vera 30% was better at maintaining color changes during storage. Beeswax 3% coating can slow down discoloration and percentage of decay until 6 days of storage. Long-term storage (12 days) with beeswax 10% was better in maintaining changes in the quality of salak madu, while for short-term storage (6 days), beeswax 3% gives better results. © Published under licence by IOP Publishing Ltd.

关键词： Coatings

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Mixed-Reality Simulator for Analysis of Interactions between Humans and Crawler Cranes 13

Mixed-Reality Simulator for Analysis of Interactions between...

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Joint 13th International Conference on Soft Computing and Intelligent systems and 25th International Symposium on Advanced Intelligent systems, SCIS and ISIS 2024

作者： Yamanobe, Kenta Yokota, Kazuya Uenoyama, Daigo Fujiura, Daisuke Ogura, Masataka Takahashi, Kengo Abe, Masajiro Nagaoka University of Technology Master's Program in Mechanical Engineering Nagaoka Japan Nagaoka University of Technology Department of Mechanical Engineering Nagaoka Japan Nagaoka University of Technology Bachelor's Program in Mechanical Engineering Nagaoka Japan Nagaoka University of Technology Center for Integrated Technology Support Nagaoka Japan Nagaoka University of Technology Department of System Safety Engineering Nagaoka Japan

ISBN: (纸本)9798350373332

Crawler cranes are used in various applications, including plant construction and civil engineering. However, accidents caused by hazardous events, such as overturning the entire body or overshadowing of a suspended load, can be problematic. Because crawler cranes are large and powerful machines, simulators are required to analyze the relationship between such hazardous events and human operations. This study proposed a framework for a mixed-reality simulator to analyze the interactions between humans and crawler cranes. This framework combined the high-performance graphics capabilities of Unreal Engine 5 with the high-precision multibody dynamics analysis of MATLAB Simscape to create a visually and physically realistic simulation. Moreover, the quantification of the decision-making process was possible based on the eye-tracking information of the operator. This study described the implementation of these features and discussed the prospects for human-crawler crane interaction analysis using this simulator. © 2024 IEEE.

关键词： MATLAB

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SYNTHESIS OF STYRENIC TONER PARTICLES BY SPG EMULSIFICATION TECHNIQUE

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Chinese Journal of Polymer Science 2000年第4期18卷 309-322页

作者： Suda Kiatkamjornwong Roongkan Nuisin Guang-HuiMa Shinzo Omi Department of Imaging and Printing Technology Faculty of ScienceChulalongkorn University.Bangkok 10330Thailand Multi-disciplinary Program of Petrochemistry and Polymer Faculty of ScienceChulalongkorn UniversityBangkok 10330Thailand Graduate School of Bio-application and System Engineering Tokyo University of Agriculture and TechnologyNakamachiKoganeiTokyo 184-8588Japan

This research studied the initiator efficiency for producing polymeric particles of poly(styrene-co-methyl methacrylate)copolymers by a Shirasu porous glass membrane(SPG)emulsification technique followed by suspension ***,ADVN,and AIBN were used as initiators and we found that BPO is the most suitable *** for various feed ratios of styrene/methyl methacrylate were thus synthesized by benzoyl peroxide,and their copolymer particle size,molecular weight distribution and pat-ride size distribution were *** n-BMA or 2-EHMA was added as the third monomer to decrease the terpolymer glass transition *** article describes the preparation technique,recipes and polymerization conditions for producing both copolymer and terpolymer particles,particle size changes,the corresponding particle morphologies and glass transition temperatures.

关键词： Shirasu porous glass emulsification n-butyl methacrylate 2-ethylhexyl methacrylate toner binder

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LED and binaural beats sleeping mask as sleep-wake cycle regulations based on brain wave stimulation

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Journal of International Dental and Medical Research 2018年第2期11卷 745-750页

作者： Karimasari, Azisya Amalia Widiyanti, Prihartini Sofiah, Amila Wardhani, Priyanka Kusuma Dzulfiqar, Andi Achmad Chabib, Choirul Asmaningtias, Novia Dwi Biomedical Engineering Study program Faculty of Science and Technology Universitas Airlangga Indonesia Institute of Tropical Disease Universitas Airlangga Indonesia Otomatization Information System Faculty of Science and Technology Universitas Airlangga Indonesia

Depression rate has reached 17-27% in Indonesia, while about 5-10% of world population have sleep disorder. Unsurprisingly, one of the symptoms of depression is sleep disorder. Sleeping disorder could be treated by sleeping mask. The material of sleeping Mask is PLA (polylactic acid) in 3D printing. There is Arduino Uno as microcontroller to control alarm for sleep-wake cycle. Device works until the first 30 minutes for blue LED and delta binaural beats and the last 30 minutes for yellow LED and gamma binaural beats.. Blue LED and delta wave of binaural beats can stimulate the delta brainwave which related with deep sleep. While yellow LED and gamma binaural beats could stimulate the gamma brain waves and trigger awakening. This research employs causal quantitative method with experimental primary data collection. Additionally, there are two tests in this research, namely sleep and awakening test. A delta wave stimulation is shown in lead C3-C4 during the sleep test. Stimulated delta wave records 23.42 times higher rate than without stimulation. Thus, the system can actually trigger a deep sleep faster. During the awakening test, the stimulation using gamma binaural beats and yellow light shows that delta brainwave amplitude in lead C3-C4 is lower;while alpha brainwave amplitude in lead O1-O2 is higher. Thus, this system is able to stimulate alpha wave faster than without stimulation. The mask could regulate sleep-wake cycle for alarm device and enhance sleep quality. © 2018 University of Dicle.

关键词： Amplitude Brain wave Depression Sleep disorder Stimulation

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Identifying and Anticipating Cyberattacks That Could Cause Physical Damage to Industrial Control systems

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IEEE Power and Energy technology systems Journal 2019年第4期6卷 172-182页

作者： Angle, Matthew G. Madnick, Stuart Kirtley, James L. Khan, Shaharyar Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA02139 United States Sloan School of Management School of Engineering Massachusetts Institute of Technology CambridgeMA02139 United States System Design and Management Program Massachusetts Institute of Technology CambridgeMA02139 United States

Physical control systems are increasingly controlled by reconfigurable, network-enabled devices to increase flexibility and ease commissioning and maintenance. Such capability creates vulnerabilities. Devices may be remotely reprogrammed by a malicious actor to act in unintended ways, causing physical damage to mechanical equipment, infrastructure, and life and limb. In this paper, past examples of actual damage to cyber-physical systems are shown, threats posed by software-controlled variable frequency drives (VFDs) are analyzed, and a small-scale version of an attack on ubiquitous VFD equipment is demonstrated. © 2014 IEEE.

关键词： Embedded systems

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Wavelet-Based system for Classification of Airborne Laser Scanner Data

Wavelet-Based System for Classification of Airborne Laser Sc...

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2003 IGARSS: Learning From Earth's Shapes and Colours

作者： Vu, T. Thuy Yokoyama, Ryuzo Yamazaki, Fumio Tokunaga, Mitsuharu STAR Program Asian Institute of Technology Pathumthani Thailand Institute of Industrial Science University of Tokyo Tokyo Japan Environmental System Engineering Kanazawa Institute of Technology Ishikawa Japan

A new semi-automatic processing system for classification of airborne laser scanner cloud points is developed. To mitigate the difficulty caused by the complex distribution of objects on earth's surface, wavelet was adopted in size-based clustering of laser points. A hybrid method of processing laser scanner data in both grid and raw formats was also adopted to speed up the processing time and adjust the smoothing effect of interpolation. The processing focused on processing the data acquired over urban area. This paper presents and explains the components of the system using the test data acquired over Shinjuku area, Tokyo, Japan.

关键词： Remote sensing

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Skull failure-correction modelling method by symmetry mirroring 45

Skull failure-correction modelling method by symmetry mirror...

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45th International Conference on Computers and Industrial engineering, CIE 2015

作者： Rudek, M. Mendes, G.C. Canciglieri, O. Da Silveira, M. Production and System Engineering Graduate Program PPGEPS Pontifical Catholic University of Parana - PUCPR Curitiba Brazil Luxembourg Institute of Science and Technology - LIST Luxembourg

This current work presents a proposal of a method for anatomical prosthesis modelling in order to generate the geometric parameters for the implants manufacturing. The concept of this proposed method is to fill the skull bone failure with the individual own skull shape by symmetric mirroring, from its non-affected opposed bone area. By using its own shape our main goal is to respect and preserve the individual morphology. A software prototype was developed as a plug-in at the Java based image processor (ImageJ) in order to generate a virtual 3D modelled anatomical prosthesis by applying all the proposed procedures. We apply the method upon a lateral skull failure as study case in order to demonstrate all the process and to discuss the evaluation of results.

关键词： Computer aided design

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The feasibility study of high temperature superconducting cable for congestion relaxation re garding quench effect

The feasibility study of high temperature superconducting ca...

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IEEE-Power-engineering-Society General Meeting

作者： Lee, GJ Lee, JP Hwang, SD Heydt, GT ChungBuk Provincial Univ. of Science and Technology South Korea Department of Electrical Engineering Chungbuk Provincial University South Korea Power System Department Korea Electric Power Research Institute South Korea New Energy System Technology Institute National Academy of Engineering Power Engineering Center Program Arizona State University Tempe AZ United States

ISBN: (纸本)078039156X

This paper presents the basic application idea of HTS (High-Temperature Superconducting) cable to solve the congestion problem of transmission line limited by voltage stability. In Korea power system, the capability of transmission system is limited by the voltage stability, and the HTS cable could be one of the countermeasures to enhance the transfer limit as its higher current capacity and lower impedance. However, the quench characteristic of HTS cable not only makes HTS cable to lose its superconductivity, but also change the line impedance and power system operating condition dramatically. This phenomenon threats the HTS cable safety as well as power system security, therefore a proper protection scheme and security control countermeasures have to be established before HTS cable implementation. In this paper, the quench characteristics of HTS cable for the fault current based on heat balance equation was established and a proper protection method by FCL (Fault Current Limiter) was suggested.

关键词： HTS cable quench voltage stability severity index power system planning congestion protection coordination scheme EMTDC simulation IEEE 14 bus system power transfer capability

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