Ighil Nessouk Rafik2025-03-022025-03-022024-06-26Engineering in Electric Vehicle Propulsion and ControlMAST.AUTO.23-23https://dspace.ummto.dz/handle/ummto/2683462 p. : ill. ; 30 cm. ( CD-Rom)Observer-based differentiators are model-based algorithms that estimate the derivatives of a measured time-varying signal, which are not available in some cases, for control use purposes. The following is a review of recent design techniques of observer-based differentiators. First of all, the design procedure of the high gain differentiator, which relies on a high-gain asymptotic observer is introduced. Then the finite time sliding mode differentiators are studied more particularly the Levant first and higher-order sliding modes differentiators. Finally the design process of prescribed-time sliding mode differentiators based on modulating functions is considered. Numerous simulation examples of the previously mentioned differentiators were conducted using MATLAB/Simulink to better illustrate the related theoretical results.enObserverBased differentiatorHigh-gain ObserverSliding mode observerModulating FunctionsThesis