Luenberger observer design for a dynamic system with embedded linear program, applied to bioprocesses

Becker, Kobe De; Bernaerts, Kristel; Waldherr, Steffen

doi:10.1016/j.ifacol.2020.12.280

Cited by 1 publication

(2 citation statements)

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“…These methods have proven particularly efficient and successful in decoupling torque and magnetic flux, which encouraged us to support them with control algorithms that do not rely on mechanical sensors in an attempt to completely abandon them for their multiple drawbacks that directly affect the efficiency of the control system as a whole. Unfortunately, the aforementioned controls require knowledge of one of the stator or rotor fluxes, but the latter is not measurable [15][16][17][18][19]. This raises in many papers the problem of estimating or observing these quantities.…”

Section: Introductionmentioning

confidence: 99%

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Robust Flux and Speed State Observer Design for Sensorless Control of a Double Star Induction Motor

Mossa

Khouidmi

Ma’arif

2022

Journal of Robotics and Control

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In this paper, a robust flux and speed observer for sensorless control of a double star induction motor is presented. Proper operation of vector control of the double star induction motor requires reliable information from the process to be controlled. This information can come from mechanical sensors (rotational speed, angular position). Furthermore, mechanical flux and speed sensors are generally expensive and fragile and affect the reliability of the system. However, the control without sensors must-have performance that does not deviate too much from that which we would have had with a mechanical sensor. In this framework, this work mainly deals with the estimation of the flux and speed using a robust state observer in view of sensorless vector control of the double star induction motor. The evaluation criteria are the static and dynamic performances of the system as well as the errors between the reference values and those estimated. Extensive simulation results and robustness tests are presented to evaluate the performance of the proposed sensorless control scheme. Furthermore, under the same test conditions, a detailed comparison between the proposed state observer and the sliding mode-MRAS technique is carried out where the results of its evaluation are investigated in terms of their speed and flux tracking capability during load and speed transients and also with parameter variation. It is worth mentioning that the proposed state observer can obtain both high current quality and low torque ripples, which show better performance than that in the MRAS system.

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Section: Introductionmentioning

confidence: 99%

“…A search for simplicity of design and robustness becomes one of the most important criteria in many applications. This demand particularly mobilizes researchers [16,18]. We strive above all to dispense the speed and flux sensors.…”

Section: Introductionmentioning

confidence: 99%