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Output Estimation and Failure Detection in Piezoelectric Actuators using Transmissibility Operators | IEEE Conference Publication | IEEE Xplore

Output Estimation and Failure Detection in Piezoelectric Actuators using Transmissibility Operators


Abstract:

In this article, we investigate how to identify faulty sensors in piezoelectric actuators used for precise positioning. Four sensors are distributed along the actuator’s ...Show More

Abstract:

In this article, we investigate how to identify faulty sensors in piezoelectric actuators used for precise positioning. Four sensors are distributed along the actuator’s cantilever structure to measure the deflection (displacement) at various points. We suggest identifying the sensor and detecting the fault in one of the sensors, which is thought to be faulty or producing a degraded signal. To address this, we use transmissibility operators, which are mathematical operators that can be used to estimate sensor measurements based on another set of sensor measurements within the same system. This estimation is highly robust against any external excitations/disturbances, as well as unknown nonlinearities or unmodeled dynamics. The estimation robustness allows for failure detection to be carried out even in the presence of significant actuator hysteresis nonlinearity and outside disturbance. Simulation results with various sensor fault conditions are used to verify the suggested strategy.
Date of Conference: 31 May 2023 - 02 June 2023
Date Added to IEEE Xplore: 03 July 2023
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Conference Location: San Diego, CA, USA

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