Fault Diagnosis in a Hydraulic Pitch Actuator Based on Frequency Domain Identification

Sandra Paola Vasquez Rodriguez, Michel Kinnaert, Rik Pintelon

Research output: Unpublished contribution to conferenceUnpublished paper


Wind turbines are equipped with condition monitoring systems that allow for a safer operation and a reduction of maintenance costs thanks to their feature of early detection of faults. Most of these systems are signal-based, however a model-based approach could enhance the performance, for example, by allowing a proper accommodation of faults through control adaptation. This project aims at designing a model-based fault diagnosis system with focus on the blade pitch system with hydraulic actuators, now that this system is characterized by a high failure rate. For this purpose, a physical model of the hydraulic pitch actuator is analyzed. This model allows the simulation of different faults: abnormal bearing friction (due to damages on the pitch bearing) and high air/water content in cylinders (due to degradation of the hydraulic oil).
Original languageEnglish
Number of pages1
Publication statusPublished - 22 Mar 2016
Event35th Benelux Meeting on Systems and Control, - Soesterberg, Netherlands
Duration: 22 Mar 201624 Mar 2016


Conference35th Benelux Meeting on Systems and Control,


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