Inertia principle based rotating speed measuring method with high stability and real-time prediction

Abstract

The invention relates to an inertial principle based rotating speed measuring method with high stability and real-time prediction. The method is characterized by comprising the following steps that 1) a smoothly operating parameter sequence is updated in real time; 2) a predicted rotating speed value is obtained by smooth prediction based on the inertial principle; 3) a real-time rotating speed value is obtained by real-time tracking based on a cycle measurement method; and 4) the double rotating speeds are processed in an integrated manner based on the tolerance. The method has the advantages that realization is easy, design is novel, measuring fluctuation caused by counting error and processing error of a pulse generator can be eliminated, the dynamic tracking effect is good, and the problem that stability and instantaneity cannot be both taken into consideration in a common rotating speed measuring method is solved.

Description

technical field [0001] The invention relates to a high-stability real-time prediction rotation speed measurement method based on the principle of inertia, and belongs to the technical field of sensor signal processing. Background technique [0002] Speed ​​measurement is the most basic and important task for testing and controlling rotating power machinery such as aero-engines, internal combustion engines, and motors. It is generally hoped to obtain accurate and timely speed information. In the actual measurement of the rotational speed, due to factors such as noise interference, the error of the measurement system itself, or improper measurement methods, the measurement results of the rotational speed will fluctuate greatly, or the measurement results will lag behind, which will lead to inaccurate measurement of the rotational speed. [0003] For the real-time speed control system of power machinery, it is required to quickly obtain the current speed information, and the fr...

AI Technical Summary

Problems solved by technology

However, due to the counting error of the cycle measurement method and the processing error of the pulse generator (such as the sound wheel), even if the rotor runs smoothly, the measured value will fluctuate to a certain extent

[0004] The Chinese patent with the publication number CN105203794A discloses a generator speed measurement system and method. The patent states that it can eliminate the measurement error caused by the processing accuracy of the sound wheel, and the measurement accuracy is high. However, the measurement system requires two speed measuring probes, and the system structure is complicated. , the installation is difficult, and the distance between the two speed measuring probes needs to be strictly controlled to ensure accurate measurement results

The Chinese patent with the publication number CN105203793A discloses a method for accurately measuring the gear speed. On the one hand, the patent measures the number of teeth passing per unit time, plus the time required for the arrival of the next tooth after the unit time. The combination of the two is The current speed value is obtained. The patent states that the measurement error is small, the precision is high, and the application range is wide. It solves the defects of the traditional frequency measurement method, but the measurement method does not consider the measurement error caused by the processing factors of the gear.

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