Results 211 to 220 of about 976,747 (262)

TIP: Time-Proportional Instruction Profiling

MICRO-54: 54th Annual IEEE/ACM International Symposium on Microarchitecture, 2021
A fundamental part of developing software is to understand what the application spends time on. This is typically determined using a performance profiler which essentially captures how execution time is distributed across the instructions of a program.
Björn Gottschall, Lieven Eeckhout, Magnus Jahre   +2 more
openaire   +2 more sources

Blade Crack Detection using Blade Tip Timing

IEEE Transactions on Instrumentation and Measurement, 2021
The harsh working environment of compressor threats the integrality of bladed disk. Crack is one of the most fatal faults of rotating blades. Detecting the crack of blades at early stage could ensure the safe operation of gas turbine and save economic costs.
Shuming Wu, Zengkun Wang, Haoqi Li, Zhibo Yang 0001, Shaohua Tian, Ruqiang Yan 0001, Shibin Wang, Xuefeng Chen 0002   +7 more
openaire   +1 more source

Synchronous vibration parameters identification by tip timing measurements [PDF]

Mechanics Research Communications, 2017
Abstract The Blade Tip Timing (BTT) measurement system is a technique to measure vibration parameters of a rotating bladed disk. In particular for synchronous vibrations the BTT provides signals versus the rotation speed of the disk starting from the measurement of the time of arrival (TOA) of each blade under the tip timing probes.
Giuseppe Battiato, Teresa M Berruti
exaly   +3 more sources

Robust sparse representation model for blade tip timing

Journal of Sound and Vibration, 2021
Abstract Blade tip timing (BTT) is one of the most important non-contact monitoring methods for blade vibration estimation. BTT predominantly consists of two steps: 1) acquiring the original pulse signal generated by the rotating blade through optical probes.
Zeng-Kun Wang, Zhi-Bo Yang, Hao-Qi Li, Shu-Ming Wu, Shao-Hua Tian, Xue-Feng Chen   +5 more
openaire   +1 more source

Experimental Investigation of the Blade Tip Timing (BTT) Uncertainties [PDF]

, 2022
The uncertainties of blade tip displacement measurement using BTT are investigated through experiments. A novel test bench is established where the blade deformation can be measured simultaneously by laser displacement sensors and BTT, which enables the determination of the BTT measurement error.
Xiao, Zhicheng, Meng, Yiming, Ouyang, Hua   +2 more
openaire   +1 more source

Tipping time of a quantum rod

American Journal of Physics, 2005
We study the tipping time of a quantum mechanical rod that is constrained to move in a plane in a gravitational potential. The initial state of the center of mass of the rod is localized within the base of support of the rod. The tipping time is found to increase exponentially with the height H of the rod as C1t0 exp[C2(H/H0)9], where C1 and C2 are ...
Mark R. A. Shegelski, Mark Lundeberg, Glen L. Goodvin   +2 more
openaire   +1 more source

Tip timing measurement chain validation with the Universal Tip Timing Calibrator UTTC, approach and experience

AIP Conference Proceedings, 2012
The presentation will outline the motivation, results and experience of the development and application of a Universal Tip Timing Calibrator (UTTC) by the Siemens Tip Timing expert group. Due to the importance of the Tip Timing blade vibration measurement technology for the development of new gas turbine frames it is indispensible to calibrate these ...
Uwe Pfeifer, Michael Zidorn
openaire   +1 more source

Tipping time of a holonomic quantum cylinder

Canadian Journal of Physics, 2011
The classical and quantum mechanical Hamiltonians for a cylinder subject to holonomic constraints are derived. The quantum mechanical Hamiltonian is simplified and cast into a dimensionless form. The tipping time of a quantum mechanical cylinder subject to gravity is calculated. Numerical solutions for an appropriate initial wave function are obtained.
Mark R.A. Shegelski, Jamie Sanchez-Fortun Stoker, Ian Kellett   +2 more
openaire   +1 more source