scholarly journals Systemwide joint position sensor fault tolerance in robot systems using Cartesian accelerometers

1996 ◽  
Author(s):  
Hal A. Aldridge ◽  
Jer-Nan Juang
Keyword(s):  
Fault Tolerance ◽  
Joint Position ◽  
Position Sensor ◽  
Sensor Fault ◽  
Robot Systems

scholarly journals Vibration Monitoring for Position Sensor Fault Diagnosis in Brushless DC Motor Drives

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2248
Author(s):  
Dimitrios A. Papathanasopoulos ◽  
Konstantinos N. Giannousakis ◽  
Evangelos S. Dermatas ◽  
Epaminondas D. Mitronikas
Keyword(s):  
Fault Diagnosis ◽  
Harmonic Component ◽  
Motor Drives ◽  
Brushless Dc Motor ◽  
Position Sensor ◽  
Sensor Faults ◽  
Sensor Fault ◽  
Brushless Dc ◽  
Non Invasive ◽  
Dc Motor Drives

A non-invasive technique for condition monitoring of brushless DC motor drives is proposed in this study for Hall-effect position sensor fault diagnosis. Position sensor faults affect rotor position feedback, resulting in faulty transitions, which in turn cause current fluctuations and mechanical oscillations, derating system performance and threatening life expectancy. The main concept of the proposed technique is to detect the faults using vibration signals, acquired by low-cost piezoelectric sensors. With this aim, the frequency spectrum of the piezoelectric sensor output signal is analyzed both under the healthy and faulty operating conditions to highlight the fault signature. Therefore, the second harmonic component of the vibration signal spectrum is evaluated as a reliable signature for the detection of misalignment faults, while the fourth harmonic component is investigated for the position sensor breakdown fault, considering both single and double sensor faults. As the fault signature is localized at these harmonic components, the Goertzel algorithm is promoted as an efficient tool for the harmonic analysis in a narrow frequency band. Simulation results of the system operation, under healthy and faulty conditions, are presented along with the experimental results, verifying the proposed technique performance in detecting the position sensor faults in a non-invasive manner.

scholarly journals Sensor-fault tolerance using robust MPC with set-based state estimation and active fault isolation

2016 ◽  
Vol 27 (8) ◽  
pp. 1260-1283 ◽  
Author(s):  
Feng Xu ◽  
Sorin Olaru ◽  
Vicenc Puig ◽  
Carlos Ocampo-Martinez ◽  
Silviu-Iulian Niculescu
Keyword(s):  
Fault Tolerance ◽  
State Estimation ◽  
Active Fault ◽  
Fault Isolation ◽  
Sensor Fault

scholarly journals Position Sensor Fault Detection of IPMSM Using Single DC-Bus Current Sensor With Accuracy Uncertainty

2019 ◽  
Vol 24 (2) ◽  
pp. 753-762
Author(s):  
Jiadong Lu ◽  
Yihua Hu ◽  
Jinglin Liu ◽  
Xiaokang Zhang ◽  
Huiqing Wen ◽  
...  
Keyword(s):  
Fault Detection ◽  
Current Sensor ◽  
Position Sensor ◽  
Sensor Fault ◽  
Sensor Fault Detection ◽  
Dc Bus
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