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IEEE/CAA Journal of Automatica Sinica 2018年第2期5卷 523-530页

作者： Shuhui Bi Lei Wang Shengjun Wen Mingcong Deng School of Electrical Engineering University of Jinan Jinan 250022 China Shandong Provincial Key Laboratory of automotive electronics Technology Institute of Automation Shandong Academy of Sciences Qilu University of Technology (Shandong Academy of Sciences) Jinan 250014 China department of electronic and Information Engineering Zhongyuan University of Technology Zhengzhou 450007 China department of Electrical and electronic Engineering Tokyo University of Agriculture and Technology 2-24-16 Nakacho KoganeiTokyo 184-8588 Japan IEEE

In this paper, operator based robust nonlinear control for single-input single-output(SISO) and multi-input multi-output(MIMO) nonlinear uncertain systems preceded by generalized Prandtl-Ishlinskii(PI) hysteresis is considered respectively. In detail, by using operator based robust right coprime factorization approach, the control system design structures including feedforward and feedback controllers for both SISO and MIMO nonlinear uncertain systems are given, *** which, the controller design includes the information of PI hysteresis and its inverse, and some sufficient conditions for the controllers in both SISO and MIMO systems should be satisfied are also derived respectively. Based on the proposed conditions, influence from hysteresis is rejected, the systems are robustly stable and output tracking performance can be ***, the effectiveness of the proposed method is confirmed by numerical simulations.

关键词： Generalized PI hysteresis operator based robust right coprime factorization robust nonlinear control

Broadband diffusion of terahertz waves by multi-bit coding metasurfaces

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Light(Science & Applications) 2015年第1期4卷 207-215页

作者： Li-Hua Gao Qiang Cheng Jing Yang Shao-Jie Ma Jie Zhao Shuo Liu Hai-Bing Chen Qiong He Wei-Xiang Jiang Hui-Feng Ma Qi-Ye Wen Lan-Ju Liang Biao-Bing Jin Wei-Wei Liu Lei Zhou Jian-Quan Yao Pei-Heng Wu Tie-Jun Cui State Key Laboratory of Millimeter Waves Department of Radio EngineeringSoutheast UniversityNanjing 210096China Cooperative Innovation Centre of Terahertz Science No.4Section 2North Jianshe RoadChengdu 610054China Institute of Modern Optics Key Laboratory of Optical Information Science and Technology(Ministry of Education)Nankai UniversityTianjin 300071China State Key Laboratory of Surface Physics Key Laboratory of Micro and Nano Photonic Structures(Ministry of Education)Department of PhysicsFudan UniversityShanghai 200433China State Key Laboratory of electronic Films and Integrated Devices University of Electronic Science and TechnologyChengdu 610054China Research Institute of Superconductor electronics(RISE) School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China Institute of Lasers and Optoelectronics College of Precision Instrument and Opto-Electronics EngineeringTianjin UniversityTianjin 300072China

The terahertz region is a special region of the electromagnetic spectrum that incorporates the advantages of both microwaves and infrared light *** the past decade,metamaterials with effective medium parameters or gradient phases have been studied to control terahertz waves and realize functional ***,we present a new approach to manipulate terahertz waves by using coding metasurfaces that are composed of digital coding *** propose a general coding unit based on a Minkowski closed-loop particle that is capable of generating 1-bit coding(with two phase states of 0 and 180°),2-bit coding(with four phase states of 0,90°,180°,and 270°),and multi-bit coding elements in the terahertz frequencies by using different geometric *** show that multi-bit coding metasurfaces have strong abilities to control terahertz waves by designing-specific coding *** an application,we demonstrate a new scattering strategy of terahertz waves—broadband and wide-angle diffusion—using a 2-bit coding metasurface with a special coding design and verify it by both numerical simulations and *** presented method opens a new route to reducing the scattering of terahertz waves.

关键词： coding diffusion metasurface terahertz waves

Radiator Vibration Fatigue Analysis

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Journal of electronics Cooling and Thermal control 2017年第1期7卷 8-21页

作者： Toure Ismael Buyun Sheng department of Mechanical and electronic Engineering Wuhan University of Technology Wuhan China

This paper is the second step of our work. The first step presents a set of parametric studies performed on automotive radiators by designing different heat exchanger models. The analysis focuses on the cooling performance for automobile radiator by changing several dimensions of the radiator fin phase (P2.5, P2.4, P2.3, P2.2, and P2.1) as well as the importance of coolant flow lay-out on the radiator global performance [1]. The second step consists on the study of the vibration fatigue of the sample with the best heat dissipation performance we design (radiator P2.1). We use Hyper Mesh to proceed with the finite element model. Frequency response analysis is solved by using MSC. Nastran (MSC. MD. Nastran. v2010.1.3-MAGNiTUDE), fatigue durability ana-lysis by using MSC Fatigue. In this experiment, the frequency response of the unit load (the unit load is 1 g) is analyzed. Based on the analysis of the frequency response of the unit load, the fatigue life of the radiator is analyzed by the PSD (power spectral density) curve and the S-N curve. From our experiments results, we observe that the radiator we design meets the international requirements of fatigue vibration under automobile normal working condition.

关键词： Automobile Radiator Radiator Fin S-N and PSD (Power Spectral Density) Curve Fatigue Durability Frequency Response

Experimental Investigation of the Fluid Dynamics of a Finned Heat Sink under Operating Conditions

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Journal of electronics Cooling and Thermal control 2014年第3期4卷 86-95页

作者： G. Casano M. W. Collins S. Piva ENDIF—ENgineering department In Ferrara Università di Ferrara Ferrara Italia School of Engineering and design Brunel University Uxbridge UK

An experimental study has been made of the fluid dynamics performance of electronic equipment designed to cool a heat sink in the form of a finned duct. The apparatus consists of a channel of rectangular section containing the finned duct. A forced airflow is driven by three fans placed in parallel in the inlet and in the outlet sections of the channel. In order to investigate a full range of flow rates, different sets of fans were used in the inlet section. Measurements were made of static pressures at different channel positions by pressure taps connected to a micro manometer, and of the flow rate by a Venturi meter. The experimental working conditions of the active fans were consistent with the manufacturers’ characteristic curves. Values of the local friction coefficient compared well with published correlations. The experimental working points agreed very well with the theoretical curve of the pressure drop and the hydraulic diameter was demonstrated to be of the appropriate size for this fluid dynamics problem.

关键词： Airflow Duct Flow Pressure Drop

Advanced Electrical Machines and Actuators for New and Emerging Applications

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Advanced Electrical Machines and Actuators for New and Emerg...

Algorithmic approaches for optimizing electronic control unit time using multi-rate sampling

2005国际电机与系统学术会议

作者： D. Howe department of electronic and Electrical Engineering University of Sheffield Mappin StreetSheffieldS1 3JD

＜正＞There is a continual demand for advanced electrical machines and drives for wide-ranging applications in all market sectors. The motivation for their development varies considerably. However, common objectives are to improve efficiency, and, thereby, to conserve energy and reduce environmental pollution, increase power density, enhance functionality, and improve reliability and maintainability, whilst the adoption of ’more-electric’ technologies is also being driven by legislation, consumer expectations regarding performance and more fierce competition in the market place. The paper will review recent developments in electrical machines and actuators, facilitated by advances in magnetic materials, semiconductor switching devices, power electronic converters and control systems, by briefly describing some of the research activities which are being undertaken at the University of Sheffield, with particular emphasis on applications in the automotive and aerospace sectors. It will also highlight the fact that there remains considerable scope for design innovation. Many of the applications pose particularly severe challenges in terms of the thermal operating environment, the rotational speed and/or space envelope constraints, for example, whilst others are particularly challenging in terms of being highly cost-sensitive or safety critical.

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control Theory and Technology 2018年第3期16卷 173-190页

作者： Rajorshee RAHA Pallab DASGUPTA Soumyajit DEY department of Computer Science and Engineering Indian Institute of Technology Kharagpur India

With the emerging migration of automotive and other distributed control platforms from federated to integrated architectures, the need for optimal utilization of ECU （electronic control unit） bandwidth will become a key requirement in the implementation of embedded control features. This paper advocates the partitioning of the operating space of the plant and the use of minimal sampling rates in each partition without compromising the overall quality of control. At the heart of the proposed methodology are our algorithms that enable the choice of the partitions and the sampling rate for each partition. We demonstrate the efficacy of our methods on two case studies, namely an anti-lock braking system and a lane departure warning system. We also study the use of a supervisory controller that controls the switching among sampling rates for a combination of the two features.

关键词： Sampling period adaptive control stability automotive software embedded control system

Smart product design for automotive systems

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Frontiers of Mechanical Engineering 2019年第1期14卷 102-112页

作者： A.Galip ULSOY department of Mechanical Engineering University of MichiganAnn ArborMI 48109-2125USA

Automobiles evolved from primarily mechanical to electro-mechanical,or mechatronic,*** example,carburetors have been replaced by fuel injection and air-fuel ratio control,leading to order of magnitude improvements in fuel economy and *** systems are pervasive in modem automobiles and represent a synergistic integration of mechanics,electronics and computer *** are smart systems,whose design is more challenging than the separate design of their mechanical,electronic and computer/control *** this review paper,two recent methods for the design of mechatronic components are summarized and their applications to problems in automotive control are ***,the combined design,or co-design,of a smart artifact and its controller is *** is shown that the combined design of an artifact and its controller can lead to improved performance compared to sequential *** coupling between the artifact and controller design problems is quantified,and methods for co-design are *** control proxy function method,which provides ease of design as in the sequential approach and approximates the performance of the co-design approach,is highlighted with application to the design of a passive/active automotive ***,the design for component swapping modularity(CSM)of a distributed controller for a smart product is *** is realized by employing distributed controllers residing in networked smart components,with bidirectional communication over the *** to CSM design are presented,as well as applications of the method to a variable-cam-timing engine,and to enable battery swapping in a plug-in hybrid electric vehicle.

关键词： mechatronics automotive control co-design component swapping modularity active suspensions variable camshaft timing engine plug-in hybrid electric vehicle

Two-Dimensional Numerical Investigation on Applicability of 45<sup>。</sup>Heat Spreading Angle

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Journal of electronics Cooling and Thermal control 2014年第1期4卷 1-11页

作者： Yasushi Koito Shoryu Okamoto Toshio Tomimura department of Advanced Mechanical Systems Kumamoto University Kumamoto Japan

The 45。heat spreading angle is familiar among thermal designers. This angle has been used for thermal design of electronic devices, and provides a heat spreading area inside a board, e.g. printed circuit board, which is placed between a heat dissipating element and a relatively large heat sink. By using this angle, the heat transfer behavior can be estimated quickly without using high-performance computers. In addition, the rough design can be made easily by changing design parameters. This angle is effective in a practical situation;however, the discussion has not been made sufficiently on the applicability of the 45。heat spreading angle. In the present study, therefore, the extensive numerical investigation is conducted for the rational thermal design using the 45。heat spreading angle. The two-dimensional mathematical model of the board is considered;the center of the top is heated by a heat source while the bottom is entirely cooled by a heat sink. The temperature distribution is obtained by solving the heat conduction equation numerically with the boundary conditions. From the numerical results, the heat transfer behavior inside the board is shown and its relation with the design parameters is clarified. The heat transfer behavior inside the 45。heat spreading area is also evaluated. The applicability is moreover discussed on the thermal resistance of the board obtained by the 45。heat spreading angle. It is confirmed that the 45。heat spreading angle is applicable when the Biot number is large, and then the equations are proposed to calculate the Biot number index to use the 45。angle. Furthermore, the validity of the 45。heat spreading angle is also confirmed when the isothermal boundary condition is used at the cooled section of the board.

关键词： 45.Heat Spreading Angle electronic Board electronics Cooling Thermal design Heat Conduction