Planetary gearbox health state assessment method

Abstract

The invention discloses a planetary gearbox health state assessment method. The planetary gearbox health state assessment method comprises a step of acquiring original vibration signals of a device to be diagnosed, a step of carrying out empirical mode decomposition of original vibration signals, a step of calculating energy values of original vibration signals, a step of extracting characteristic vectors, and a step of assessing health state of a planetary gearbox. The planetary gearbox health state assessment method is advantageous in that the extracted characteristics are normally more stable than the original signals, and at the same time, the data dimension can be reduced, and therefore the planetary gearbox health state assessment method is more effective. The planetary gearbox health state assessment method is suitable for the processing of the non-linear and non-stationary vibration signals, and the required characteristic parameters extracted from the vibration signals having the severe noise pollution can be used for the assessment of the health state. By adopting the planetary gearbox health state assessment method, the assessment result can be directly provided without analyzing the frequency spectrum, and therefore the method is more intelligent, and is easier to use.

Description

technical field [0001] The invention belongs to the technical field of planetary gearbox health state assessment, and in particular relates to a method for evaluating the health state of a planetary gearbox. Background technique [0002] Planetary gearboxes are usually widely used in large and complex mechanical equipment such as fans, helicopters, and cranes. At present, most studies on the health status assessment of mechanical equipment transmission systems focus on fixed-axis transmission systems. However, the transmission system of many new equipment is composed of complex planetary transmission mechanism and parallel shaft transmission mechanism, and the actual operating conditions usually change. The complexity of the structure and the change of working conditions make the degradation mode and characteristic frequency of the planetary transmission mechanism It is more complex than the fixed shaft transmission mechanism, and the difficulty of theoretical analysis and ...

AI Technical Summary

Problems solved by technology

In principle, the health status of the equipment can be evaluated by comparing and analyzing the currently collected vibration signals with the vibration signals in the previous normal state, but such a comparison is not very effective in the actual operation process, because a large number of vibration signals It is very difficult to conduct direct comparative analysis

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