Results 31 to 40 of about 233 (128)
A modal estimation method of rotating blade based on compressed sensing and blade tip timing
Journal of Low Frequency Noise, Vibration and Active ControlStructural modal estimation has consistently remained one of the most crucial areas of research in mechanical vibration analysis and signal processing. It is imperative to accurately monitor the vibration signals of rotor blades and their corresponding ...
Hua Zheng +4 more
doaj +2 more sources
Journal of Electrical and Computer Engineering, Volume 2023, Issue 1, 2023., 2023 The development of a network termed microgrid (MG) has been motivated owing to augmentation in renewable energy source (RES) infiltration along with the utilization of enhanced power electronic technologies. Recently, more popularity has been gained by the hybrid MG (HMG).
Ginbar Ensermu +6 more
wiley +1 more source
Whole genome population structure of North Atlantic kelp confirms high‐latitude glacial refugia
Molecular Ecology, Volume 31, Issue 24, Page 6473-6488, December 2022., 2022 Abstract Coastal refugia during the Last Glacial Maximum (~21,000 years ago) have been hypothesized at high latitudes in the North Atlantic, suggesting marine populations persisted through cycles of glaciation and are potentially adapted to local environments.
Trevor T. Bringloe +13 more
wiley +1 more source
Shock and Vibration, Volume 2021, Issue 1, 2021., 2021 Blade tip‐timing is one of the most effective methods for blade vibration parameters identification of turbomachinery. Once‐per revolution (OPR) sensor is usually used to determine the rotating speed and as a time reference. However, the OPR sensor leads to a large measurement error or even failure, or it is difficult to install.
Liang Zhang +3 more
wiley +1 more source
Applied Sciences, 2023 A new method for the synchronous vibration parameter identification of constant-speed rotating blades based on blade tip clearance (BTC) measurement and blade tip timing (BTT) is introduced.
Liang Zhang +4 more
doaj +1 more source
Uncertainties in the calibration process of blade tip timing data against finite element model predictions [PDF]
, 2020 Blade stresses are determined from blade tip timing (BTT) data by relating the measured tip deflection to the stresses via Finite Element (FE) models. This process includes some uncertainties due to the following: 1) the shift in the equilibrium position
Mohamed, Mohamed +2 more
core +1 more source
Analysis and Calibration of Blade Tip-Timing Vibration Measurement Under Variable Rotating Speeds
IEEE Access, 2021 Blade tip timing (BTT) vibration measurement is a promising on-line blade monitoring method, but various uncertainties bring great challenge in engineering applications. Most existing works are based on the assumption of constant rotating speeds. However,
Zhongsheng Chen +3 more
doaj +1 more source
Journal of KONBiN, 2018 Abstract An expert system aided method of the blade-tip signal decomposition to the turbine blade vibration sources identification is presented. The method utilises a multi-valued diagnostic model based on the discrete wavelet transform.
Henryk Borowczyk +2 more
openaire +1 more source
An Experimentally Validated Modal Model Simulator for the Assessment of Different Blade Tip Timing Algorithms [PDF]
, 2019 Blade Tip Timing (BTT) technology is concerned with the estimation of turbomachinery blade vibration. A BTT system comprises two parts: (a) measurement system for blade tip arrival times (“BTT data”); (b) the analysis algorithms. Simulators that generate
Russhard, Peter +2 more
core +1 more source
Constant speed tip deflection determination using the instantaneous phase of blade tip timing data [PDF]
, 2021 Blade Tip Timing (BTT) is a non-intrusive measurement technique that can be used to estimate the vibration characteristics of rotor blades during turbomachine operation.
Oberholster, Abraham Johannes (Abrie) +2 more
core +1 more source