Abstract
Takagi-Sugeno Sliding Mode Observers can be effectively employed for fault diagnosis in nonlinear systems. In this paper, the discontinuous observer term responsible for establishing the sliding motion is modified, such that the individual system output errors can be weighted using appropriate gains. This approach opens up new design possibilities for systems where the orders of magnitude of the individual outputs differ significantly. A formal proof for the existence of the sliding motion when using the modified Takagi-Sugeno Sliding Mode Observer (TS SMO) is given by showing both that the reachability condition can be fulfilled and that the sliding surface is reached in finite time. As an example, the modified TS SMO is used to reconstruct actuator offset faults for wind turbines within a simulation using the aero-elastic code FAST.
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Georg, S., Schulte, H. (2014). Takagi-Sugeno Sliding Mode Observer with a Weighted Switching Action and Application to Fault Diagnosis for Wind Turbines. In: Korbicz, J., Kowal, M. (eds) Intelligent Systems in Technical and Medical Diagnostics. Advances in Intelligent Systems and Computing, vol 230. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-39881-0_3
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DOI: https://doi.org/10.1007/978-3-642-39881-0_3
Publisher Name: Springer, Berlin, Heidelberg
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