The paper presents a virtual platform implemented in SystemC based on AMBA-bus standards. The platform has been implemented as a multi-core structure with all components required by typical electronic embedded systems...
详细信息
The paper presents a virtual platform implemented in SystemC based on AMBA-bus standards. The platform has been implemented as a multi-core structure with all components required by typical electronic embedded systems. The structure allows flexible modeling and simulation of various applications composed of many cooperating components. Thanks to used high level abstract tools (SystemC) and modeling strategies (TLM), the projects implemented on this virtual platform could be efficiently verified and reused. The work presents results of some of designs simulated on the platform which could be used for design space exploration purposes.
The paper focuses on the design of a platoon control system with a diverse vehicle formation. After a brief summary of the vehicle model and the control criteria, the paper demonstrates methods for eliminating the lon...
详细信息
It is difficult to build accurate mathematical models for nonlinear systems which suffer parametric uncertainty and heavy exogenous disturbance. Partial linearization was applied in this study to offset the effect of ...
详细信息
It is difficult to build accurate mathematical models for nonlinear systems which suffer parametric uncertainty and heavy exogenous disturbance. Partial linearization was applied in this study to offset the effect of losing nonlinear part of the system after complete linearization by introducing nonlinear functions into the linear model. On the condition that the nonlinear function satisfied constraints, Lyapunov function was employed to get the sufficient condition for the robust $H optimal control law of the nonlinear system to exist. For the convenience of get the solution, the sufficient condition obtained was transformed into a problem of finding out feasible solution by linear matrix inequalities. Finally, a class of model simulation verifications was carried out, showing that proposed algorithm and designed control law were reasonable and effective.
Nonlinear Correlation Coefficient (NCC) is proposed to quantitatively measure the nonlinear relation between the variables. Much attention paid on NCC leads to application being far from the basic research. In this pa...
详细信息
Nonlinear Correlation Coefficient (NCC) is proposed to quantitatively measure the nonlinear relation between the variables. Much attention paid on NCC leads to application being far from the basic research. In this paper, we propose a mathematical framework to systematically analyze the effects of statistical distribution on NCC. It is found that the arbitrary distortion on distribution leads to the decreasing of NCC and the sharing structure of the concerned distribution minimizes the NCC. Furthermore, considering the situation of a sequence of discrete observations, we provide a collection of rigorous logistic results to justify NCC is an increasing function of sequence length. The numerical examples on Lorenz and linear auto-regression system are used to illustrate proposed results suitably and effectively.
Modern technology offers the possibility to construct networked monitoring systems from autonomous computing nodes equipped with appropriate sensors. Complementing such a system with actuators yields a cyber-physical ...
详细信息
Modern technology offers the possibility to construct networked monitoring systems from autonomous computing nodes equipped with appropriate sensors. Complementing such a system with actuators yields a cyber-physical system that must be able to cope with uncertainties arising from feedback loops via the physical world. The common property of such systems lies in the high degree of uncertainty in the varying configuration of the system and also in the potentially high amounts of (unstructured) data that can be generated by such a system. In order to tackle these problems and make the distributed monitoring systems more usable the concepts of situational information and hierarchies of situations can be applied in this domain. The problem of high amounts of data can be partially solved by arriving at a higher level of abstraction lower in the processing chain, communicating only data fused into an ontological structure to information consumers. The fusion templates are called situation parameters and values of the fused data items are called situational parameter values in the context of the current article. Situation parameter values must be tagged with situational and temporal validity information in order to cope with the delays and spatial uncertainties that can occur in a distributed monitoring system. The lower level situation parameters can be fused to even higher level situation parameters, projecting the temporal and spatial validity information from the lower level parameters up to the higher level parameters. The article presents the concepts of forming situational information templates and hierarchies based on data available from a distributed monitoring system where the temporal and spatial properties of situational information are taken into account. A case study is presented that shows the feasibility of the concepts in a real world monitoring scenario.
Markov models are well established technique used widely for modeling equipment deterioration. This work presents an approach where Markov models represent equipment ageing and also incorporate various maintenance act...
详细信息
The chapter is focused on the human resource influence on dependability of discrete transportation systems (DTS). The human resource means the driver of the vehicle. We add him/her as a new element of the system descr...
详细信息
This paper presents a robust object tracking method using a sparse shape-based object model for embedded systems with limited computational capabilities. Our approach consists of three ingredients namely shapes, a mot...
详细信息
The chapter presents a method of Web-based information system dependability analysis based on functional and reliability approach. A service availability is predicted by developed by authors a two level simulator (usi...
详细信息
暂无评论