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作者： Bleicher, A. Schauer, T. Valtin, M. Raisch, J. Schlaich, M. Conceptual and Structural Design Department of Civil and Structural Engineering Berlin Germany Control Systems Group Department of Electrical Engineering and Computer Science Berlin Germany

ISBN: (纸本)9783902661937

This paper describes the development of an active vibration control system for a light and flexible stress ribbon footbridge. The 13 m span Carbon Fiber Reinforced Plastics (CFRP) stress ribbon bridge was built in the laboratory of the department of Civil and Structural engineering, Berlin Institute of Technology. Its lightness and flexibility result in high vibration sensitivity. To reduce pedestrianinduced vibrations, very light pneumatic muscle actuators are placed at handrail level introducing control forces. First, a reduced discretized analytical model is derived for the stress ribbon bridge. To verify the analytical prediction, experiments without feedback control are conducted. Based on this model, a velocity feedback control strategy is designed to actively control first mode vibrations. To handle the nonlinearities of the muscle actuator a subsidiary nonlinear force controller is implemented based on exact linearisation methods. The stability of the entire closed-loop system with actuator saturation is investigated by the Popov Criterion. Control performance is verified by experiments. It is demonstrated that handrail introduced forces can efficiently control the first mode response. © 2011 IFAC.

关键词： Closed loop systems

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Tracking and occlusion handling in multi-sensor networks by particle filter

Tracking and occlusion handling in multi-sensor networks by ...

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2011 IEEE GCC Conference and Exhibition, GCC 2011

作者： Rezaee, Hamideh Aghagolzadeh, Ah Seyedarabi, M. Hadi Zu'Bi, Snadi Al University of Tabriz Department of Electrical and Computer Engineering 29 Bahman Blvd. Tabriz *** Iran Department of Electronic and Computer Engineering School of Engineering and Design Brunel University West London United Kingdom

ISBN: (纸本)9781612841199

In this paper we propose a multi sensor tracking method. Tracking is done independently for each view. Fusing several cues including color, edge, texture and motion constrained by structure of environment is used in a novel way and in particle filter framework. The results of individual image planes are projected to ground plane using homography relation. The similarity of projected locations with the reference model and minimum variance estimate are two key points to evaluate the location of the target. Also, we introduce a method based on two views tracking to handle occlusion. Robust statistic is used to declare an occlusion in one view. Homography relation and inter-frame transformation are the tools to cancel the occlusion. Experimental results show the robustness and accuracy of the proposed method. © 2011 IEEE.

关键词： Monte Carlo methods

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Development of a computer assistive input device using Screen-Partitioning and mousekeys method for people with disabilities

Development of a computer assistive input device using Scree...

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2011 International Conference on computer Science and Service System, CSSS 2011

作者： Shih, Ching-Tien Shih, Ching-Hsiang Guo, Nai Ren Department of Electronics Engineering and Computer Science Dong Fang Design University Kaohsiung 82941 Taiwan Department of Special Education National Dong Hwa University Hualien 970 Taiwan Department of Electrical Engineering Dong Fang Design University Kaohsiung 82941 Taiwan

ISBN: (纸本)9781424497638

The latest research proposed a novel computer input device that adopted Screen-Partitioning method to improve people with disabilities pointing efficiency. The disabled people could use a commercial numerical keyboard as the input device of the device instead of special-design device. However, the effect of the latest research in moving mouse cursor is likely weak when a target is extremely small or the resolution of computer screen is too high. This study proposed a novel method by using Screen-Partitioning and Mousekeys method to improve the efficiency of movement. © 2011 IEEE.

关键词： Efficiency

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An approach to SysML and simulink based motion controller design for inverted pendulum robots

An approach to SysML and simulink based motion controller de...

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50th Annual Conference on Society of Instrument and Control Engineers, SICE 2011

作者： Phaoharuhansa, Danai Shimada, Akira Division of Electronical Engineering and Computer Science Shibaura Institute of Technology Tokyo Japan Department of Engineering and Design Shibaura Institute of Technology Tokyo Japan

ISBN: (纸本)9784907764395

Nowadays, a lot of inverted pendulum robots have been developed. The complexity of the dynamical control systems is increased and they are advanced toward autonomous inverted pendulum robots. When the controllers are designed, the software MATLAB/Simulink is often used. It is well known that it is a very useful tool to design and analyze motion control systems. However, it is not always useful to express huge or multifunctional systems. At that time, System Modeling language (SysML) is known as a useful tool for that system design. Then it seems the usage of the both tools are useful. In order to develop the inverted pendulum robots in practice, we need multi-stand points for the real time systems. We have to study the both of them and investigate how to fill the gap. This paper introduces our requirement, overview of inverted pendulum robot system, hardware configurations, and map the balancing control using observer based control from Simulink model to SysML models. Furthermore, SysML is a guideline to define the interconnection between functions and combine them together. © 2011 SICE.

关键词： Simulink

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Simulation data management approach for developing adaptronic systems - The W- model methodology

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World Academy of Science, engineering and Technology 2011年 51卷 429-435页

作者： Nattermann, Roland S. Anderl, Reiner Department of Computer Integrated Design TU Darmstadt Germany Department of Computer Integrated Design Faculty of Mechanical Engineering Germany

Existing proceeding-models for the development of mechatronic systems provide a largely parallel action in the detailed development. This parallel approach is to take place also largely independent of one another in the various disciplines involved. An approach for a new proceeding-model provides a further development of existing models to use for the development of Adaptronic Systems. This approach is based on an intermediate integration and an abstract modeling of the adaptronic system. Based on this system-model a simulation of the global system behavior, due to external and internal factors or Forces is developed. For the intermediate integration a special data management system is used. According to the presented approach this data management system has a number of functions that are not part of the normal PDM functionality. Therefore a concept for a new data management system for the development of Adaptive system is presented in this paper. This concept divides the functions into six layers. In the first layer a system model is created, which divides the adaptronic system based on its components and the various technical disciplines. Moreover, the parameters and properties of the system are modeled and linked together with the requirements and the system model. The modeled parameters and properties result in a network which is analyzed in the second layer. From this analysis necessary adjustments to individual components for specific manipulation of the system behavior can be determined. The third layer contains an automatic abstract simulation of the system behavior. This simulation is a precursor for network analysis and serves as a filter. By the network analysis and simulation changes to system components are examined and necessary adjustments to other components are calculated. The other layers of the concept treat the automatic calculation of system reliability, the normal PDM-functionality and the integration of discipline-specific data into the system

关键词： Information management

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Operational mode exploration for reconfigurable systems with multiple applications

Operational mode exploration for reconfigurable systems with...

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2011 International Conference on Field-Programmable Technology, FPT 2011

作者： Wildermann, Stefan Reimann, Felix Teich, Jurgen Salcic, Zoran Hardware/Software Co-Design University of Erlangen Nuremberg Germany Department of Electrical and Computer Engineering University of Auckland New Zealand

ISBN: (纸本)9781457717406

Modern embedded systems incorporate multiple applications that run on the same execution platform. However, due to limited resources and other constraints, not all the combinations of applications may run concurrently. This paper tackles the problem of determining which combinations of applications can run on a given hardware architecture without violating given constraints, thus creating feasible operational modes of the system. The architecture itself may include standard processors for software implementation of applications and dynamically (partially) reconfigurable hardware resources, which enable dynamic sharing of the resource in different operational modes. The paper describes the models, theoretical results, and the mode exploration algorithm to perform this task. Here, the specification is symbolically encoded so that the feasibility of modes can be tested by applying a SAT solver. In the experiment, we demonstrate how to apply our approach to build a self-organizing smart camera framework. © 2011 IEEE.

关键词： Reconfigurable hardware

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The future of advanced driving assistance system development in China

The future of advanced driving assistance system development...

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IEEE International Conference on Vehicular Electronics and Safety

作者： Duan, Lian Chen, Fang Department of Computer Science and Engineering Chalmers University of Technology Gothenburg Sweden Interaction Design Department of Apply IT Chalmers University of Technology Gothenburg Sweden

ISBN: (纸本)9781457705762

Nowadays, with the rapid development of vehicle industry in China, an increasing number of companies realized the importance of culture adaption, when implementing ADAS (Advanced Driving Assistance System) to the vehicles in China. However, some designing issues of these systems need to be solved, taking consideration of driver's behavior and traffic situation in China. There is a lack of studies on Chinese drivers and related to HMI design of ADAS systems in the literature. There are limited reports on Chinese traffic and drivers studies, but still lack of the necessary depth. Some interaction design methodologies, including personas, focus group study, questionnaire and so on, were used in these reports. However, these studies are neither intensive nor comprehensive. Although (part of) the issues are brought up and analyzed, only general solutions are mentioned for the designing of the systems. Present paper, through literature review, indicated different areas that need to be focused on that are related to culture issues and the possible methodologies that can be applied. © 2011 IEEE.

关键词： design

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3D Pose tracking of walker users' lower limb with a structured-light camera on a moving platform

3D Pose tracking of walker users' lower limb with a structur...

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2011 IEEE computer Society Conference on computer Vision and Pattern Recognition Workshops, CVPRW 2011

作者： Hu, Richard Zhi-Ling Hartfiel, Adam Tung, James Fakih, Adel Hoey, Jesse Poupart, Pascal David R. Cheriton School of Computer Science University of Waterloo Canada Department of Systems Design Engineering Canada Department of Kinesiology Canada

ISBN: (纸本)9781457705298

Tracking and understanding human gait is an important step towards improving elderly mobility and safety. Our research team is developing a vision-based tracking system that estimates the 3D pose of a wheeled walker user's lower limbs with a depth sensor, Kinect, mounted on the moving walker. Our tracker estimates 3D poses from depth images of the lower limbs in the coronal plane in a dynamic, uncontrolled environment. We employ a probabilistic approach based on particle filtering, with a measurement model that works directly in the 3D space and another measurement model that works in the projected image space. Empirical results show that combining both measurements, assuming independence between them, yields tracking results that are better than with either one alone. Experiments are conducted to evaluate the performance of the tracking system with different users. We demonstrate that the tracker is robust against unfavorable conditions such as partial occlusion, missing observations, and deformable tracking target. Also, our tracker does not require user intervention or manual initialization commonly required in most trackers. © 2011 IEEE.

关键词： Gesture recognition

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Measuring the size of changes in automotive software systems and their impact on product quality 11

Measuring the size of changes in automotive software systems...

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12th International Conference on Product Focused Software Development and Process Improvement, PROFES 2011

作者： Durisic, Darko Staron, Miroslaw Nilsson, Martin Department of Computer Science and Engineering Chalmers and Gothenburg University Gothenburg Sweden Department of Electrical Systems Design Volvo Car Corporation Gothenburg Sweden

ISBN: (纸本)9781450307833

The amount of software in modern cars is significant and is growing with releases of new cars. The evolutionary development of software systems means new releases require changes to the existing systems. The changes might have a positive and negative impact on the quality of the final product and software architects working with the changes often conduct impact analyses using metrics. In this paper, we present metrics used to measure the complexity and size of software systems with the purpose of identifying potential risk caused by the changes. The metrics are designed to support early phases of software development and to help reduce costly late changes to the architecture of the systems. Their main goal is to verify nonfunctional aspects of the system and identify parts that should be tested more in order to reduce the risk of deteriorated quality.

关键词： Software design

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Collaborative scheduling in highly dynamic environments using error inference

Collaborative scheduling in highly dynamic environments usin...

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2011 7th International Conference on Mobile Ad-hoc and Sensor Networks, MSN 2011

作者： Zhang, Qingquan Gu, Yu Gu, Lin Cao, Qing He, Tian Lemko Corporation IL United States Department of Computer Science and Engineering University of Minnesota Twin Cities United States Department of Computer Science and Engineering Hong Kong University of Science and Technology Hong Kong Information Systems Technology and Design Pillar Singapore University of Technology and Design Singapore Department of Electrical Engineering and Computer Science University of Tennessee Knoxville United States

ISBN: (纸本)9780769546100

Energy constraint is a critical hurdle hindering the practical deployment of long-term wireless sensor network applications. Turning off (i.e., duty cycling) sensors could reduce energy consumption, however at the cost of low sensing fidelity due to sensing gaps introduced. Existing techniques have studied how to collaboratively reduce the sensing gap in space and time, however none of them provides a rigorous approach to confine sensing error within desirable bounds. In this work, we propose a collaborative scheme called CIES, based on the novel concept of error inference between collaborative sensor pairs. Within a node, we use a sensing probability bound to control tolerable sensing error. Within a neighborhood, nodes can trigger additional sensing activities of other nodes when inferred sensing error has aggregately exceed the tolerance. We conducted simulations to investigate system performance using historical soil temperature data in Wisconsin-Minnesota area. The simulation results demonstrate that the system error is confined within the specified error tolerance bounds and that a maximum of 60 percent of the energy savings can be achieved, when the CIES is compared to several fixed probability sensing schemes such as eSense. We further validated the simulation and algorithms by constructing a lab test-bench to emulate actual environment monitoring applications. The results show that our approach is effective and efficient in tracking the dramatic temperature shift in highly dynamic environments. © 2011 IEEE.

关键词： Energy conservation

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