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Communication Dans Un Congrès Année : 2022

Study of testing strategy for performance analysis of actuator layer in safety instrumented system

Walid Mechri

Résumé

The increasing trend towards the development of reusable rocket engines pushes towards the development of Prognosis and Health Monitoring (PHM) approaches useful to monitor the health of the system and plan its maintenance. In this perspective, we present a hybrid method for Remaining Useful Life (RUL) estimation of rocket engines turbo-pump bearings based on Maximum Overlap Discrete Wavelet Packet Transform (MODWPT) and polynomial approximation. The proposed method calculates the bearing RUL in six main steps: data acquisition, wavelet decomposition, feature extraction, degradation detection, Health Indicator (HI) computation and RUL estimation. The obtained results showed that this technique can be successfully used to separate and isolate vibration trends connected to progressive degradation. The main contribution of this work consists in proposing a monotonically increasing HI which maintains a physical meaning allowing to estimate the degradation level. The proposed HI has proven to be able to effectively quantify the level of degradation and predict it for a certain group of degradation evolution profiles.
This paper analyzes the degradation of SIS actuator layer by considering an intermediate degraded state between the working and failed states. Sometimes, the current system states are not distinguished perfectly during proof tests. The developed approach consists in using the knowledge of both the system’s functioning and, proof testing nature and its parameters. These parameters increase the complexity of the model when considering the unavailability due to the proof test. This approach has been applied to a study case in order to illustrate the effect of proof testing parameters on the SIS performance.
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Dates et versions

hal-03892859 , version 1 (10-12-2022)

Identifiants

  • HAL Id : hal-03892859 , version 1

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Walid Mechri, Christophe Simon. Study of testing strategy for performance analysis of actuator layer in safety instrumented system. 16th European Workshop on Advanced Control and Diagnosis, ACD 2022, Nov 2022, Nancy, France. ⟨hal-03892859⟩
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