Guo Haotian

TL;DR: In this article, a synchronous resonance vibration measurement method of blade based on tip-timing is presented, which requires no once-per-revolution sensor which makes it more generally applicable in the condition where this sensor is difficult to install, especially for the high-pressure rotors of dual-rotor engines.

TL;DR: In this paper, a dual-beam fiber optic measurement system that can measure the tip timing and tip clearance simultaneously is described, which is insensitive to signal intensity variation caused by fluctuations in environmental conditions such as light source instability, contamination, and blade tip imperfection.

TL;DR: In this paper, a tip clearance measurement method based on all-fiber tip timing is proposed, where a clearance value is ingeniously converted into a tip timing signal relevant to the clearance value so that a measurement system is irrelative to most environmental factors such as the leaf and electromagnetic interference, and the interference resistance and the clearance measurement precision of the system are improved.

TL;DR: Methods based on software and hardware to reduce the error caused by the tip clearance change are presented and the results prove that both methods can effectively reduce the impact of tip clearance variation on the blade tip-timing and improve the accuracy of measurements.

TL;DR: In this article, the authors proposed a method for on-line measurement of blade vibration parameters based on the least square principle under the condition that the Campbell diagram is known before measurement, using the vibration displacement difference measured by the multiple sensors, the sensor mounting angle and a set of unknown quantities related to the vibration parameters to form a hyperstatic binary linear equation set.