Abstract
This paper tossed a challenge of developing a novel active fault-tolerant control scheme for switching systems subject to exogenous disturbances and sensor faults. The proposed method is based on a reconfiguration mechanism that uses a mixed \({H_\infty }/{{H}}_{-} \) formulation to design a robust state feedback FTC. This later is designed through a convex optimization technique which leads to solve linear matrix inequalities. Indeed, the main idea presented in this work is to develop an observer-based controller able to detect with accuracy the instant of fault occurrence, to compensate for the fault effect and to minimize the tracking error for all bounded reference inputs. To illustrate the efficiency of the tracking FTC scheme, extensive simulation results carried on a two-link robot arm are included.
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Abbreviations
- \({A}^\mathrm{T}\) :
-
Transpose of the matrix A
- \({\bar{{e}}}\) :
-
Trajectory tracking error
- \({y}_{\mathrm{ref}}\) :
-
Reference input signal
- \({P} \ge {0}\) :
-
Symmetric, positive and definite matrix
- \({S}_{i}^{j}\) :
-
Detection threshold assigned to the jth residual component generated in mode i
- \({S}_{{\rho }}\) :
-
Sensor fault signature
- \({{\ell }}\) :
-
Link length
- m :
-
Mass
- I :
-
Moment of inertia
- \({{\ell }} _\mathrm{c}\) :
-
Distance from the joint to the center of mass
- FTC:
-
Fault-tolerant control
- SS:
-
Switching system
- FDI:
-
Fault detection and isolation
- GAS:
-
Globally asymptotically stable
- LMI:
-
Linear matrix inequality
- \(*\) :
-
The symmetric elements in the matrix
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Labidi, I., Takrouni, A. & Zanzouri, N. Tracking Fault-Tolerant Control for a Class of Switching Systems with Sensor Faults. Arab J Sci Eng 45, 6639–6648 (2020). https://doi.org/10.1007/s13369-020-04558-8
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DOI: https://doi.org/10.1007/s13369-020-04558-8