scholarly journals A Modified Intermittent Process Performance Monitoring Method via Attitude Information for a Satellite

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 26799-26808 ◽  
Author(s):  
Zhiqiang Zhang ◽  
Zhiyong She ◽  
Aihua Zhang ◽  
Xing Huo
Keyword(s):  
Performance Monitoring ◽  
Process Performance ◽  
Monitoring Method

A non-contact method for part-based process performance monitoring in end milling operations

2015 ◽  
Vol 83 (1-4) ◽  
pp. 13-20 ◽  
Author(s):  
Hadi Fekrmandi ◽  
Muhammad Unal ◽  
Amin Baghalian ◽  
Shervin Tashakori ◽  
Kathleen Oyola ◽  
...  
Keyword(s):  
Performance Monitoring ◽  
End Milling ◽  
Contact Method ◽  
Process Performance ◽  
Milling Operations

scholarly journals Process Performance Monitoring of Batch Polymerisation Reactors by MSPC Methods

1998 ◽  
Vol 31 (11) ◽  
pp. 731-736
Author(s):  
M. Papazoglou ◽  
E.B. Martin ◽  
A.J. Morris ◽  
C. Kiparissides
Keyword(s):  
Performance Monitoring ◽  
Process Performance

scholarly journals Remote surface damage detection on rotor blades of operating wind turbines by means of infrared thermography

2018 ◽  
Author(s):  
Dominik Traphan ◽  
Iván Herráez ◽  
Peter Meinlschmidt ◽  
Friedrich Schlüter ◽  
Joachim Peinke ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Flat Plate ◽  
Infrared Thermography ◽  
Wind Turbines ◽  
Performance Monitoring ◽  
Surface Defects ◽  
Early Stage ◽  
Rotor Blades ◽  
Stereoscopic Particle Image Velocimetry ◽  
Monitoring Method

Abstract. Wind turbines are constantly exposed to wind gusts, dirt particles, and precipitation. Depending on the site, surface defects on rotor blades emerge from the first day of operation on. While erosion increases quickly with time, even small defects can affect the performance of the wind turbine due to nonlinear interaction. Consequently, there is a demand for a remote and easily applicable condition monitoring method for rotor blades that is capable of detecting surface defects at an early stage. In this work it is analyzed if infrared thermography (IRT) can meet these requirements by visualizing differences in the thermal transport and the corresponding surface temperature of the wall-bounded flow. Firstly, a validation of the IRT method against stereoscopic particle image velocimetry measurements is performed comparing both types of experimental results for the boundary layer of a flat plate. Then, the main characteristics of the flow in the wake of generic surface defects on different types of lifting surfaces are studied both experimentally and numerically: temperature gradients behind protruding surface defects on a flat plate and a DU 91-W2-250 profile are studied by means of IRT. The same is done with the wall shear stress from RANS simulations of a wind turbine blade. It is consistently observed both in the experiments and the simulations that turbulent wedges are formed on the flow downstream of generic surface defects. These wedges provide valuable information about the kind of defect that generates them. At last, experimental and numerical performance measures are taken into account for evaluating the aerodynamic impact of surface defects on rotor blades. We conclude that the IRT method is a suitable remote condition and performance monitoring technique for detecting surface defects on wind turbines at an early stage.

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