Fault Detection and Diagnosis and Fault Tolerance Compensation for Electric Actuator

2013 ◽  
Vol 328 ◽  
pp. 144-148
Author(s):  
Huan Xin Cheng ◽  
Fei Yi ◽  
Li Cheng
Keyword(s):  
Fault Detection ◽  
Active Fault ◽  
Fault Tolerant ◽  
Moving Average ◽  
System Modeling ◽  
Adaptive Threshold ◽  
Fault Detection And Diagnosis ◽  
Electric Actuator ◽  
Detection And Diagnosis ◽  
Weighted Moving Average

In the paperhe faults of loops for the process control system, electric actuators (valves) faults for example,established a historical fault library to diagnose the type of faults.Through system modeling method, a mathematical model analyzed the residuals robustness, which proposed a weighted moving average residuals and adaptive threshold envelope trajectory-based fault detection methods.Finally, the faults were adjusted by the active fault tolerant compensation module reasonably.

scholarly journals Fault-Tolerant SRM Drive with a Diagnosis Method Based on the Entropy Feature Approach

2020 ◽  
Vol 10 (10) ◽  
pp. 3516 ◽  
Author(s):  
Vitor F. Pires ◽  
Tito G. Amaral ◽  
Armando Cordeiro ◽  
Daniel Foito ◽  
Armando J. Pires ◽  
...  
Keyword(s):  
Fault Detection ◽  
Fault Tolerant ◽  
High Reliability ◽  
Power Converter ◽  
Fault Detection And Diagnosis ◽  
Switched Reluctance ◽  
Power Semiconductors ◽  
Power Semiconductor ◽  
Diagnosis Method ◽  
Detection And Diagnosis

The power electronic converter design is essential for the operation of the switched reluctance motor (SRM). Thus, a fault-tolerant power converter is fundamental to ensure high reliability and extend the drive operation. To achieve fault tolerance, fault detection and diagnosis methods are critical in order to identify, as soon as possible, the failure mode of the drive. To provide such capability, it is proposed in this paper a new fault-tolerant power converter scheme combined with a fault detection method regarding the most common power semiconductors failures in SRM drives. The fast and reliable proposed diagnosis method is based on the entropy theory. Based on this theory, normalized indexes (diagnostic variables) are created, which are independent from the load and speed of the motor. Through this method, it is possible to identify the faulty leg, as well as the type of power semiconductor fault. To test and evaluate the proposed solution several laboratory experiments were carried out using a 2 kW four-phase 8 / 6 SRM.

Sign in / Sign up

Export Citation Format

Share Document