Philippe Charbonnaud

Optimal predictive control of water transport systems: Arrêt-Darré/Arros case study

This paper proposes the use of predictive optimal control as a suitable methodology to manage efficiently transport water networks. The predictive optimal controller is implemented using MPC control techniques. The Arrêt-Darré/Arros dam-river system located in the Southwest region of France is proposed as case study. A high-fidelity dynamic simulator based on the full Saint-Venant equations and able to reproduce this system is developed in MATLAB/SIMULINK to validate the performance of the developed predictive optimal control system. The control objective in the Arrêt-Darré/Arros dam-river system is to guarantee an ecological flow rate at a control point downstream of the Arrêt-Darré dam by controlling the outflow of this dam in spite of the unmeasured disturbances introduced by rainfalls incomings and farmer withdrawals.

Flood lamination strategy based on a three-flood-diversion-area system management

The flood lamination has for principal objective to maintain a downstream flow at a fixed lamination level. For this goal, it is necessary to proceed to the dimensioning of the river system capacity and to make sure of its management by taking into account socio-economic and environmental constraints. The use of flood diversion areas on a river has for main interest to protect inhabited downstream areas. In this paper, a flood lamination strategy aiming at deforming the wave of flood at the entrance of the zone to be protected is presented. A transportation network modeling and a flow optimization method are proposed. The flow optimization method, is based on the modeling of a Min-Cost-Max-flow problem with a linear programming formulation. The optimization algorithm used in this method is the interior-point algorithm which allows a relaxation of the solution of the problem and avoids some non feasibility cases due to the use of constraints based on real data. For a forecast horizon corresponding to the flood episode, the management method of the flood volumes is evaluated on a 2D simulator of a river equipped with a three-flood-diversion-area system. Performances show the effectiveness of the method and its ability to manage flood lamination with efficient water storage.

Interoperability Service Utility Model and its Simulation for Improving the Business Process Collaboration

In this paper an interoperability service utility (ISU) model is defined and formalized for improving the collaboration between partners. The ISU model makes it possible to limit the associated risk during the exchange of herogeneous information between enterprises. Another advantage of the approach consists in the simulation-based evaluation method of the impact of interoperability parameters on the performances of the business process. The integration of the ISU model was achieved at the business activity level and a method for performance evaluation is presented. The effectiveness of the ISU model was studied in a national industrial project and is shown herein on a simple example of P2P collaboration.

HYBRID CONTROL ACCOMMODATION FOR WATER-ASSET MANAGEMENT OF HYDRAULIC SYSTEMS SUBJECTED TO LARGE OPERATING CONDITIONS

Abstract The Hybrid Control Accommodation (HCA) strategy was proposed to improve the water asset management of hydraulic systems by resource allocation and setpoint assignment. Hydraulic system dynamics are taking into account during the setpoint assignment step which consists in controlling gates for larges operating conditions. For hydraulic systems subjected to strong disturbances, transfer delays are variable, thus different operating modes must be considered. A multimodelling method associated with a transfer delay selection technique allowing for the determination of the number of models, is proposed. The simulation results on the first reach of the Neste canal show the effectiveness of the HCA strategy.

Hybrid Control Accommodation by Resource Allocation and Setpoint Assignment 1

Abstract This paper presents a supervision and hybrid control accommodation method applied to water management. The supervision module allows the process data conditioning, the detection of discrepancy between the expected value and the real value, and the process state diagnosis. In the hybrid accommodation module, setpoints are determined taking into account the detected discrepancy, process state, time delays and communication protocol. The hybrid control method was developed to carry out the water management of a reach canal.

Impact Evaluation of Interoperability Decision Variables on P2P Collaboration Performances

This article deals with the impact evaluation of interoperability decision variables on performance indicators of business processes. The case of partner companies is studied to show the interest of an Interoperability Service Utility (ISU) on business processes in a peer to peer (P2P) collaboration. Information described in the format and the ontology of a broadcasting entity is transformed by ISU into information with the format and the ontology of the receiving entity depending on the available resources of interoperation. These resources can be human operators with defined skill level or software modules of transformation in predefined languages. A design methodology of a global simulation model for estimating the impact of interoperability decision variables on performance indicators of business processes is proposed. Its implementation in an industrial case of collaboration shows its efficiency and its interest to motivate an investment in the technologies of enterprise interoperability.

Distributed embedded health assessment of networked instruments

Abstract This article presents an applicative architecture based on a solving method for embedded technical health assessment of complex systems. This architecture is defined in order to provide services enabling the evaluation of the health status of complex systems. Diagnostic and prognostic services provide information to the maintenance decision support system that leads to reduce the periods of unavailability and determine if future missions of complex systems can be carried out. The architecture presented in this paper implements distributed diagnostic and prognostic functions using multi-***agent techniques. An example shows the effectiveness of the applicative architecture.

Enhancing interoperability between enterprise planning applications: An architectural framework

In this article, a model of service oriented market is presented. It gives a more equitable opportunity of integration in the business markets for the small and medium enterprises. Nevertheless, multi-site planning is a critical and difficult task due to the heterogeneity between planning applications of the various partners. For this objective, the proposed interoperable and distributed architecture SCEP-SOA for multi-site planning is based on SOA (service oriented architecture), integrating the concepts of the generic model of planning and scheduling SCEP (supervisor, customer, environment, and producer). This interoperable architecture enables an applicative interoperability as well as a semantic interoperability between different planning applications used by the partners.