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Navigation in constrained areas such as ports or dense urban environments is often exposed to global navigation satellite system (GNSS) satellites masking caused by the infrastructures. In this case, the GNSS positioning is inaccurate or unavailable and proprioceptive sensors are generally used to temporarily localise the vehicle on a map. However, the drift of these sensors rapidly causes the navigation...
This article presents the implementation of an indoor localization approach that combines map matching and a circular particle filter defined in a Bayesian framework. The technique relies only on velocity and heading observations coupled with a map of the road network. No prior knowledge of the initial position is given. A circular distribution is used to match the vehicle's heading with the roads...
The international standard IEC 61508 presents the basis activities related to the life cycle of Electrical, Electronic and Programmable Electronic Systems (E/E/PE) that are used to perform safety functions. This international standard provides in part 6 the techniques used to evaluate the safety related systems by the calculation of average probability of failure on demand. This calculation depends...
The industrial sector requires not only the performance of systems in terms of quality, productivity and reliability, but also in terms of security. The implementation of Fuzzy Logic Controller (FLC) in Field Programmable Gate Array (FPGA) does not allow only the system reliability and reduce the controller conception life cycle, but also ensures a safety integrity level (SIL) which is required by...
Analysis of a safety fuzzy logic controller implemented in Field Programmable Gate Array (FPGA) can be performed by different methods. These methods should comply with international standards (IEC 61508 [1] and ISA TR 84.0.0.2 [2]). This paper proposes a comparison between two safety fuzzy logic controllers both implemented in FPGA with 1002 and 2003 architectures. This comparison is based on a qualitative...
In this paper we present our approach in the field of Intelligent Tutoring System (ITS), in fact the risk of dropping out for learners have emerged as crucial issues to be solved. So it is necessary to ensure an individualized and continuous learner's follow-up during learning process. Several research effort has been spent on the development of ITS. However the available literature does not generally...
The aim of this paper is to present our approach in the field of Intelligent Tutoring System (ITS), in fact there is still the problem of knowing how to ensure an individualized and continuous learners follow-up during learning process, indeed among the numerous methods proposed, very few systems concentrate on a real time learners follow-up. Our contribution in these areas is to design and develop...
Map matching is the process of finding a match for each GPS point in a vehicle's trajectory to roads on a digital map. Extensive research has been conducted during the last years yielding many algorithms based on different approaches. One of the challenges that face those algorithms is the interruption of GPS signals that occurs specially in dense urban environments. In these cases on-board sensors...
In this paper we present our approach in the field of Intelligent Tutoring System (ITS), in fact the risk of dropping out for learners have emerged as crucial issues to be solved. So it is necessary to ensure an individualized and continuous learner's follow-up during learning process. Several research effort has been spent on the development of ITS. However the available literature does not generally...
The multi-model interacting algorithm, based on the Kalman filter, is defined in the linear domain. In this paper, we propose a multi-model interacting filter for the circular domain. The proposed algorithm is defined in a Bayesian framework with a von Mises circular distribution. It is used to estimate the direction of a vehicle and to define its dynamic behavior. The different models are a right...
Based on operating mode management, this paper introduces a framework to help study the dynamics of Discrete Event Systems (DES). Studied systems present several operating modes thus causing complexity of state space explosion. For this, we propose a multi-model approach and each model describes a system in a given operating mode. We assume that only one attempted operating mode is activated at a...
In E-learning, there is still the problem of knowing how to ensure an individualized and continuous learner's follow-up during learning process, indeed among the numerous tools proposed, very few systems concentrate on a real time learner's follow-up. Our work in this field develops the design and implementation of a Multi-Agent Systems Based on Dynamic Case Based Reasoning which can initiate learning...
In distance learning/training in a Computing Environment for Human Learning (CEHL), among the numerous methods proposed, very few concentrate on a real time follow-up of learner/trainee. Our work develops the design and implementation of a MultiAgent System based on case based reasoning which can initiate learning and provide an individualized monitoring of learner/trainee. When interacting with the...
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