Effect of Stability Indices on Robustness and System Response in Coefficient Diagram Method

Bhusnur, Surekha

doi:10.15623/ijret.2015.0410049

Cited by 7 publications

(1 citation statement)

References 12 publications

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“…In order to resolve the last well-known problems, a nonlinear robust tracking controller is created by combining the coefficient diagram method (CDM) [5][6][7][8][9] and backstepping procedure [10][11][12][13][14][15][16][17][18] (CDM-backstepping) to keep almost all the robustness properties in the presence of considerable variations in parametric mismatches, external disturbances and sensor noise with exponential convergence. CDM-backstepping by means of a nonlinear observer is founded to control the position of the steel ball for the interested system.…”

Section: Introductionmentioning

confidence: 99%

Archives of Electrical Engineering

Haouari¹,

Bali²,

Tadjine³

et al. 2018

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In this paper, we propose a robust nonlinear control design concept based on a coefficient diagram method and backstepping control, combined with a nonlinear observer for the magnetic levitation system to achieve precise position control in the existence of external disturbance, parameters mismatch with considerable variations and sensor noise in the case, where the full system states are supposed to be unavailable. The observer converges exponentially and leads to good estimate as well as a good track of the steel ball position with the reference trajectory. A simulation results are provided to show the excellent performance of the designed controller.

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