Transient impact noise evaluation method of automobile transmission system based on loudness salience quantity

Abstract

The invention relates to a transient impact noise evaluation method of an automobile transmission system based on the loudness salience quantity. The transient impact noise evaluation method of the automobile transmission system based on the loudness salience quantity comprises the steps of: (1), arranging microphones in a test automobile, and respectively arranging the four microphones in the right ear position of a driver, the right ear position of an assistant driver, the right ear position of a passenger at the left side of the back row and the right ear position of the passenger at the right side of the back row; (2), performing transmission system transient impact noise testing on the test automobile in different working conditions, and furthermore, acquiring noise signals in variousworking conditions in the test process through the microphones; (3), analyzing the acquired noise signals by utilizing a loudness calculation method, so that a time-varying loudness curve is obtained; and (4), according to the loudness curve, extracting the reference loudness and the loudness peak value at the impact time, obtaining the loudness salience quantity by calculating the difference value between the loudness peak value and the reference loudness, and evaluating the transient impact noise of the automobile transmission system according to the loudness salience quantity. The evaluation method in the invention can be used for effectively and objectively evaluating the transient impact noise of the automobile transmission system.

Description

technical field [0001] The invention relates to the field of vibration and noise of an automobile transmission system, in particular to a method for evaluating transient impact noise of an automobile transmission system based on loudness salient amount. Background technique [0002] With the continuous development of the automobile industry, people have higher and higher requirements for driving comfort in the car, and the noise and vibration in the car is an important indicator of comfort. When the automobile transmission system is running, transient operations such as shifting gears, stepping on the accelerator, closing the accelerator, and stepping on the clutch are prone to vibration and impact noise. For example, the dual-clutch transmission is prone to shifting transient impact noise during the gear shifting process; the AT transmission is in the process of transiently stepping on the accelerator, due to the gear gap, spline gap and assembly gap in the transmission sys...

AI Technical Summary

Problems solved by technology

For example, the dual-clutch transmission is prone to shifting transient impact noise during the gear shifting process; the AT transmission is in the process of transiently stepping on the accelerator, due to the gear backlash, spline backlash and assembly backlash in the transmission system, the sudden change or reverse of the engine torque may also occur. can cause transient impact noise

These transient impact noises are difficult points in the process of vehicle adjustment and matching, which reduce the quality of interior noise

At present, there is no objective quantitative index for the evaluation of transient impact noise, and people often use subjective evaluation methods for evaluation, but subjective evaluation is different and random, and cannot objectively reflect the magnitude of transient impact noise

Images