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This paper presents the design of a super-twisting with a high-gain observer-based state and sensor faults estimations for a continuous stirred tank reactor (CSTR). The proposed schemes transform the original system into two subsystems, the first subsystem includes the nominal plant where a high-gain observer is proposed for state estimation, whereas the second subsystem has only sensor faults where...
This paper deals with the design of a Proportional Multiple Integral (PMI) observer for Takagi-Sugeno systems with immeasurable premise variables subjected to unknown inputs. The introduction of an output error injection in the premise variable of the PMI observer allows to significantly reduce the conservatism of LMI-based stability conditions. A simulation example of a chaotic system is given to...
In this paper, two approaches to speed estimation, presented in the literature, for a sensorless control of double star induction machine. We will discuss briefly the advantages, disadvantages, and limits of use of these techniques. We will then apply these two sensorless control techniques to the double star induction machine. The simulation results obtained showed that the speed sensorless vector...
This paper deal with the problem of H∞ robust fault estimation for discrete time nonlinear system with a sector bounded nonlinear additive terms and multiple bounded state delay using the Takagi-Sugeno (T-S) fuzzy model. A fuzzy-fault estimation observer (FFEO) design is proposed to achieve fault estimation of T-S state delay models using fuzzy Lyapunov functions (FLF) with actuator and sensor faults...
The satellite in geostationary orbit present many flexibility due to flexible appendages, solar pressure and fuel sloshing in the tanks which they pose great challenges for accurate attitude control. In this paper, an anti-disturbance proportional-derivative (PD) controller is designed to stabilize the attitude while rejecting the effects of flexible vibrations, environmental disturbances, and unmodeled...
This paper presents a sensorless nonlinear control for an induction motor drive. The strategy is based on backstepping control in order to ensure a high-performance control and a good dynamic in different uncertainties and external disturbance. Moreover, a model reference adaptive system (MRAS) is used for rotor speed and rotor flux estimations; investigate a sensorless control algorithm by decreasing...
This paper deals with the detection and localization of electrical drives faults, especially those containing induction machines. First, the context of the study is presented and an Extended Kalman Filter is described for induction machines fault detection. Then the modeling procedure under faulty conditions is shown, and the machine diagnosis methods are developed. The proposed diagnosis approach...
In this paper robust nonlinear observer and controller are designed for sensorless control of interior permanent magnet synchronous motor (IPMSM). The proposed method is based on the high order sliding mode technique. The super twisting algorithm is combined with an interconnected observer which allows using it in multi-input multi output case. The proposed controller computed using the MTPA strategy...
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