This paper describes the system architecture set up by the consortium of the EUREKA CELTIC BOSS project for enhancing the security of passengers inside commuter trains. The functional approach, together with obtained ...
详细信息
This paper describes the system architecture set up by the consortium of the EUREKA CELTIC BOSS project for enhancing the security of passengers inside commuter trains. The functional approach, together with obtained technical improvements in the three domains of wireless communications, abnormal events detection and video compression and robustness enhancement are presented. The demonstrator set up in the project, which was installed in a real commuter train in commercial operation, is also reported as proof-of-concept.
The paper is concerned with the stability analysis of a feedback controlled resonant dual channel boost converter. The output voltage is controlled by using constant frequency PWM and PI controller. The analysis is ba...
详细信息
ISBN:
(纸本)1424408431;9781424408436
The paper is concerned with the stability analysis of a feedback controlled resonant dual channel boost converter. The output voltage is controlled by using constant frequency PWM and PI controller. The analysis is based on the eigenvalues of the Jacobian matrix of the Poincare Map Function (PMF). After small perturbation determining the deviations of the state variables from the periodic trajectory, the Jacobian matrix is calculated without the need to determine the PMF itself. The introduction of the so-called auxiliary state vector greatly facilitates the calculation. Calculation and simulation results included are used in the design of the control loop.
Service-oriented architecture can be considered as a philosophy or paradigm in organizing and utilizing services and capabilities that may be under the control of different ownership domains. Virtualization provides a...
详细信息
Service-oriented architecture can be considered as a philosophy or paradigm in organizing and utilizing services and capabilities that may be under the control of different ownership domains. Virtualization provides abstraction and isolation of lower level functionalities, enabling portability of higher level functions and sharing of physical resources. However, dynamics, environmental conditions and increasing complexity / heterogeneity of underlying resources call for adaptive resource handling. In this view an intelligent distributed architecture that enables dynamic user management and control on network-wide resource sharing by using the service oriented architecture concept is presented. Additionally, the proposed architecture supports trading of resources that will enable the transformation of traditional business models.
The utilization of solar energy can be made by photovoltaic (PV) cells to generate electric power directly and solar thermal (T) panels can be applied to generate heat power. When the utilization of the solar energy i...
详细信息
The utilization of solar energy can be made by photovoltaic (PV) cells to generate electric power directly and solar thermal (T) panels can be applied to generate heat power. When the utilization of the solar energy is necessary to generate electric power, the option of using T panels in combination with some heat/electric power conversion technology can be a viable solution. The power generated by utilizing the solar energy absorbed by a given area of solar panel can be increased if the two technologies, PV and T cells, are combined in such a way that the resulting unit will be capable of co-generation of heat and electric power. In the present paper combined Photovoltaic/Thermal panels are suggested to generate heat power to produce hot water, while the photovoltaic part is used to obtain electric power mainly for covering the electric power consumption of the system, to supply the electronic control units and to operate pump drives etc. Ac and dc supplies are provided by converters for covering self-consumption and possibly the need of some household appliances. The development and design of the system is made by extensive use of modeling and simulation techniques. In the paper a part of the simulation studies, carried out to determine the energy balance in the electric energy conversion section of the system and the control structure, assuming stand-alone operation is presented.
Three slip controllers are designed and implemented on an anti-lock braking system (ABS), a PI controller, one SISO fuzzy controller without dynamics and a PI-fuzzy one. The system is highly nonlinear. The design appr...
详细信息
Three slip controllers are designed and implemented on an anti-lock braking system (ABS), a PI controller, one SISO fuzzy controller without dynamics and a PI-fuzzy one. The system is highly nonlinear. The design approaches are based on system modeling and identification and knowledge from experiments. The controllers are based on the local linearization of the controlled plant and the use of fuzzy control in terms of the modal equivalence principle. The simplicity of design and implementation is highlighted by real-time experiments.
暂无评论