Method and system for calculating dynamic torsional rigidity of rotating shaft system and computer equipment

Abstract

The invention discloses a method for calculating dynamic torsional rigidity of a rotating shaft system, which comprises the following steps: acquiring an input end rotating speed, an output end rotating speed and a torque of a target rotating shaft system under a preset working condition; calculating a relative rotation speed difference between the input end and the output end according to the input end rotation speed and the output end rotation speed; performing integration processing on the relative rotation speed difference to generate a relative rotation angle of the input end and the output end; performing low-pass filtering processing on the relative rotation angle and the torque; constructing an angle-torque curve according to the relative rotation angle and the torque after low-pass filtering; the angle-torque curve is fitted into a linear unary curve through a least square method, and the slope of the linear unary curve is the dynamic torsional rigidity of the rotating shaft system. The invention further discloses a method and system for calculating the dynamic torsional rigidity of the rotating shaft system and computer equipment. By adopting the method, the parameter input accuracy of the transmission system simulation model can be improved, and the precision of the simulation model is further improved.

Description

technical field [0001] The invention relates to the technical field of automobile transmission systems, in particular to a method for calculating dynamic torsional stiffness of a rotating shaft system, a system for calculating dynamic torsional stiffness of a rotating shaft system, and computer equipment. Background technique [0002] In the simulation of the whole vehicle transmission system, the moment of inertia and torsional stiffness of each rotating shaft system are the most important input parameters. If the parameter settings are unreasonable, the simulation model cannot accurately obtain the real information of the torsional vibration mode and response of the system, which will cause the simulation model to fail to accurately analyze the NVH problem caused by the transmission system. [0003] In the prior art, the measured shafting is usually installed on the torque bench, one end of the shafting is fixed, and the other end is torsionally loaded by the loading motor...

AI Technical Summary

Problems solved by technology

The NVH problem caused by the transmission system generally occurs under operating conditions, so the torsional stiffness in the simulation model uses a static value, which will lead to a decrease in model accuracy

At the same time, the equipment required by the above method is relatively complicated, and special fixtures are required for connection and fixation, and the measured shaft system needs to be disassembled into component levels for measurement

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