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20th Intelligent Transport systems World Congress, ITS 2013

作者： Aoki, Hirofumi Ozaki, Osamu Advanced Vehicle Control System Development Division Toyota Motor Corporation 1200 Mishuku Susono Shizuoka410-1193 Japan Department of Mechanical Science and Engineering Nagoya University Japan

It is important to understand the driver's car-following tendency to enhance the effectiveness as well as the acceptance of advanced driving support systems. If a system can estimate the driver's usual car-following tendency, it can provide avoidance support matched to his/her sense of normal safety driving when the vehicle is approaching a preceding one. Since the car-following tendency varies not only between drivers but also within a driver by the feeling and/or the driving environment, real-time estimation is essential. This study introduces a method that can easily predict the car-following tendency. The method uses such parameters as the throttle-pedal released timing and the braking timing that were found to be correlated from the naturalistic driving data analysis. It was found that the method can predict the car-following tendency within a short distance. We applied the method to a forward collision warning system and confirmed the potential benefit of the system.

关键词： advanced driver assistance systems

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Mode decoupling controller for feedback model updating

Mode decoupling controller for feedback model updating

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2004 ASME International Mechanical engineering Congress and Exposition, IMECE

作者： Jung, Hnsang Park, Youngjin Park, K.C. System Dynamics and Applied Control Laboratory Department of Mechanical Engineering Korea Advanced Institute of Science and Technology Daejon 305-701 Korea Republic of Center for Aerospace Structures Department of Aerospace Engineering University of Colorado Boulder United States

A novel concept of feedback loop design for modal test and model updating is proposed. This method uses the closed-loop frequency information for parameter modifications to overcome the problems associated with the conventional methods employing the modal sensitivity matrix. To obtain new modal information from the closed-loop system, controllers should be effective in changing modal data while guaranteeing the stability of the closed-loop system. The present paper proposes a mode-decoupling controller that can alter a target mode while guaranteeing the stability of the closed-loop, and that can be constructed by using the measured open-loop mode shapes. A simulation based on time domain input/output data is performed to evaluate the feasibility of the proposed control method, which is subsequently corroborated via experiments. Experimental data obtained on a beam via the proposed mode-decoupling controller have been applied to estimate thicknesses of a beam. The results show that the proposed approach outperforms conventional methods with a far less number of data set for the estimation of system parameters. © 2004 by ASME.

关键词： Modal analysis

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The power performance and fuel economy estimation for vehicle concept planning and design using VHDL-AMS HV full vehicle simulation

The power performance and fuel economy estimation for vehicl...

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2012 IEEE 13th Workshop on control and Modeling for Power Electronics, COMPEL 2012

作者： Tsuji, Kimitoshi Kato, Toshiji Advanced Vehicle Control System Engineering Dev. Toyota Motor Corporation 1200 Mishuku Susono Shizuoka 410-1193 Japan Department of Electrical Engineering Doshisha University Kyotanabe Kyoto 610-0321 Japan

ISBN: (纸本)9781424493739

关键词： Carbon dioxide

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VHDL-AMS full hybrid vehicle simulation model for the concept planning and the power performance and fuel economy estimation results

VHDL-AMS full hybrid vehicle simulation model for the concep...

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7th IFAC Symposium on Advances in Automotive control, AAC 2013

ISBN: (纸本)9783902823434

By VHDL-AMS (IEC61691-6, IEEE1076.1) Full vehicle simulation, the fuel economy, the effect of heat energy recovery from the exhaust gas, and the power performance were discussed. The basic model performance was validated by PRIUS. The fuel economy for the LA#4 driving pattern was 22.0km/L by the simulation and on other hand measurement was 21.7km/L (error 1.4%). The energy management using an exhaust gas heat exchange system realized 10.3% fuel consumption improvement during warming up. As for the power performance, the simulated acceleration time of 0-100km/h was 11.12sec and the measured vehicle time was 11.27sec. The error between simulation and actual measurement result was 1.4%. We showed that the multi-domain full vehicle simulation is effective for the vehicle concept planning. Since the HV model uses embedded real control software, the VHDL-AMS modeling can be used as SIL at system control development stage.

关键词： Fuel economy

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Robustness Margin in Linear Time Invariant Fractional Order systems

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IFAC Proceedings Volumes 2010年第21期43卷 198-203页

作者： Kamran Akbari Moornani Mohammad Haeri Advanced Control System Lab Electrical Engineering Department Sharif University of Technology Tehran Iran (Tel: +98-21-66165971). Advanced Control System Lab Electrical Engineering Department Sharif University of Technology Tehran Iran (Tel: +98-21-66165964)

In this paper, the computation of robustness margin for linear time invariant fractional order systems is studied. For the definition of robustness margin, we employ the one introduced for polynomials (i.e. integer order) and extend it to fractional order functions. Using the well known concept of the value set and knowing its shape for the intended functions, this paper presents an easy way to obtain the robustness margin for fractional order systems. To illustrate the results, a numerical example is provided.

关键词： Fractional order systems LTI systems BIBO-stability Stability robustness margin Value set Real parametric uncertainties

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Absolute longitudinal distance measurement verification of a standard polystyrene nanoparticle near a surface in water by means of multi-wavelength evanescent field 22

Absolute longitudinal distance measurement verification of a...

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22nd International Conference of the European Society for Precision engineering and Nanotechnology, EUSPEN 2022

作者： Blattler, Aran Khajornrungruang, Panart Suzuki, Keisuke Baba, Akiyoshi Goto, Daiki Graduate School of Computer Science and System Engineering Mechanical Information Science and Technology Course Kyushu Institute of Technology Fukuoka Japan Department of Intelligent and Control Systems Advanced Mechanical Division Kyushu Institute of Technology Fukuoka Japan Center of Microelectronic System Kyushu Institute of Technology Fukuoka Japan School of Computer Science and System Engineering Advanced Mechanical Course Kyushu Institute of Technology Fukuoka Japan

ISBN: (纸本)9781998999118

In the wet semiconductor process, abrasive nanoparticles are widely used in the chemical mechanical polishing (CMP) process to polish wafer surfaces for high planarization. During polishing, nanoparticles move with a high-speed three-dimensional (3D) position in the solution. In the 3D particles's moving positions, Z is a perpendicular longitudinal distance between the surface to the nanoparticle that plays a significant role in polishing, which could not be measured by general microscopy without longitudinal scanning. To understand nanoparticle phenomena near-surface, we have proposed and developed the apparatus with real-time fastmotion tracking on optical multi-wavelength evanescent fields microscopy to measure the 3D motion of the nanoparticle in water without scanning. In euspen's 2020, we could verify the relative distance ?Z of nanoparticles in water, but the absolute distance Z is unknown yet. In this manuscript, we have therefore developed an invisible nano-step height in water to verify the absolute height Z of an individual nanoparticle. The invisible nano-step height in water is made from an optical resin with a refractive index of 1.35 that is close to a refractive index of water to avoid unnecessary light during experimental verification. The nano-step height was less than 100 nm on a glass surface, fabricated using nanoimprint lithography. Polystyrene f100 nm standard particles in water were used to verify the height Z. The results of height Z of nanoparticles could be measured less than 100 nm with the measurement uncertainty ±10 nm (2s), which is related to the interferometer result of the nano-step height. © European Society for Precision engineering and Nanotechnology, Conference Proceedings - 22nd International Conference and Exhibition, EUSPEN 2022. All rights reserved.

关键词： Nanoparticles

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Exponential Stability and Feasibility of Receding Horizon control for Constrained systems

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IFAC Proceedings Volumes 1998年第18期31卷 317-322页

作者： Jae-Won Lee Wook Hyun Kwon Hyung S. Cho System and Control Sector Samsung Advanced Institute of Technology School of Electrical Engineering Seoul National University Department of Mechanical Engineering Korea Advanced Institute of Science and Technology

In this paper, we propose a new receding horizon controller for discrete linear systems with hard constraints on inputs and states. It is shown that exponential stability of the closed loop system with the proposed receding horizon controller, is guaranteed utilizing terminal ellipsoid constraints. In order to improve the feasibility, we also propose some implementable versions of the proposed controller where the system matrix is partitioned into the stable and unstable modes and hard state constraints are softened. We also propose some methods to penalize violations resulting from softened state constraints, and make comparison among them by some illustrative examples. Dans cette communication, nous proposons des commandes a horizon fuyant par retour d'état ou de sortie pour des systèmes linéaires en temps discret soumis à des contraintes sur l'entrée et sur l'état. Les commandes à horizon fuyant proposées sont obtenues à partir d'un probléme d'optimisation à horizon fini où la matrice de coût final et la contrainte ellipsoéde invariante artificielle sont moins restrictives que la contrainte égalité finale habituelle. On considère les problèmes avec contraintes strictes ou contraintes mixtes dans le cas de retour d'état, et le problème avec contraintes mixtes dans le cas de retour de sortie. On montre, en utilisant l'approche de Lyapunov, que toutes les lois de commande proposées guarantissent la stabilité exponentielle des systèmes en boucle fermée pour tout les ensembles initiaux faisables.

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Mesenchymal stem cells loaded on 3D-printed gradient poly(e-caprolactone)/methacrylated alginate composite scaffolds for cartilage tissue engineering

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Regenerative Biomaterials 2021年第3期8卷 70-83页

作者： Yanyan Cao Peng Cheng Shengbo Sang Chuan Xiang Yang An Xiaochun Wei Zhizhong Shen Yixia Zhang Pengcui Li Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education MicroNano System Research CenterCollege of Information and ComputerTaiyuan University of TechnologyTaiyuan 030024China College of Information Science and Engineering Hebei North UniversityZhangjiakou 075000China Shanxi Key Laboratory of Bone and Soft Tissue Injury Repair Department of OrthopedicsThe Second Hospital of Shanxi Medical UniversityTaiyuan 030001China Department of Plastic Surgery Peking University Third HospitalBeijing 100191China Department of Biomedical Engineering College of Biomedical EngineeringTaiyuan University of TechnologyTaiyuan 030024China

Cartilage has limited self-repair ability due to its avascular,alymphatic and aneural *** combination of three-dimensional(3D)printing and tissue engineering provides an up-and-coming approach to address this ***,we designed and fabricated a tri-layered(superficial layer(SL),middle layer(ML)and deep layer(DL))stratified scaffold,inspired by the architecture of collagen fibers in native cartilage *** scaffold was composed of 3D printed depth-dependent gradient poly(e-caprolactone)(PCL)impregnated with methacrylated alginate(ALMA),and its morphological analysis and mechanical properties were *** prove the feasibility of the composite scaffolds for cartilage regeneration,the viability,proliferation,collagen deposition and chondrogenic differentiation of embedded rat bone marrow mesenchymal stem cells(BMSCs)in the scaffolds were assessed by Live/dead assay,CCK-8,DNA content,cell morphology,immunofluorescence and real-time reverse transcription polymerase chain ***-loaded gradient PCL/ALMA scaffolds showed excellent cell survival,cell proliferation,cell morphology,collagen II deposition and hopeful chondrogenic differentiation compared with three individual-layer ***,our study demonstrates the potential use of the gradient PCL/ALMA construct for enhanced cartilage tissue engineering.

关键词： three-dimensional printing cartilage tissue engineering PCL methacrylated alginate bone marrow mesenchymal stem cells

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A 3 DOF exoskeleton for upper limb motion assist: consideration of the effect of bi-articular muscles

A 3 DOF exoskeleton for upper limb motion assist: considerat...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： K. Kiguchi T. Fukuda Department of Advanced System Control Engineering Saga University Saga Japan Department of Micro System Engineering University of Nagoya Nagoya Japan

We have been developing exoskeleton systems to assist the motion of physically weak persons such as elderly, disabled, and injured persons. The proposed exoskeletons are controlled basically based on the electromyogram (EMG) signals. Even though the EMG signals contain very important information, however, it is not very easy to predict the user's upper-limb motion (elbow and shoulder motion) based on the EMG signals in real-time because of the difficulty in using the EMG signals as the controller input signals. In this paper, we propose a control method for a 3DOF exoskeleton system for human upper-limb motion assist considering the effect of bi-articular muscles.

关键词： Exoskeletons Muscles Electromyography Motion control control systems Humans Senior citizens Elbow Shoulder Medical robotics

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A Multifunctional Self-calibrated Sensor For Brake Fluid Condition Monitoring

A Multifunctional Self-calibrated Sensor For Brake Fluid Con...

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IEEE SENSORS

作者： Chuantong Wang Katsunori Shida Department of Advanced System and Control Graduate School of Science and Engineering Saga University Japan

A multifunctional self-calibrated sensor is proposed for on-line monitoring of liquid level and water content of brake fluid using capacitive method. The sensor is characterized by self-calibration ability to influence factors including temperature, water content (to liquid level sensing) and variety of brake fluid without calibration arithmetic supported by database as in conventional intelligent sensor systems. By using mutual calibrated output functions and taking new brake fluid as on-line reference, the sensor is well self-calibrated to the influence factors. The prototype sensor is developed and tested. The effectiveness of sensor is conformed by experimental results.

关键词： Condition monitoring Intelligent sensors Sensor phenomena and characterization Temperature sensors Capacitive sensors Sensor systems Calibration Arithmetic Databases Prototypes

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