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Design observers of a vehicle system : A graphical approach

Abderrahim Frih, Zakaria Chalh, Mostafa Mrabti


An observer can reconstruct or estimate in real time the current state of a real system using available measures, without prior knowledge of the initial conditions, to have complete and specific information on system status. In addition, it allows to estimate the unmeasurable states of a system, also replace expensive or difficult to maintain sensors. For example the slip sensor....
For this ain, we will conceive observers proportional and proportional integral full-order on a linear mechatronic system using a graphical approach to model it and that will be easy to handle thereafter, the causal properties and structural analysis of the bond graph tool are implemented for the synthesis of the observer. As a result, the calculation of the gains of the Luenberger observer and proportional integral observer are based on graphical procedures. equally to give a comparison between the measured values and estimate to justify the importance and interest of the proposed approach. Simulation tests on a mechanical system in the automobile field shows the performance of the observer Luenberger and the proportional integral linears graph developed in order to measure and estimate the state unmeasurable.


bond graph, Luenberger observer, proportional integral observer, automobile mechanical system, performance, estimate.

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