Torsional resonance control method for vehicle multi-power source coupling transmission system

Abstract

The invention relates to the field of torsional vibration control methods, and provides a vehicle multi-power source coupled transmission system torsional resonance control method. The torsional resonance control method includes the following steps that 1, a matrix A of natural vibration frequency f of each part under different gears and different transmission paths is established; 2, a matrix B of resonance excitation frequency f f of torsional vibration of different orders driven by different dynamic modes is established; and S 3, if the resonance excitation frequency f f i j of torsional vibration of the j order driven by a power mode i at an x gear meets the requirement that the resonance excitation frequency of the torsional vibration of the j order is close to the natural vibration frequency of each component under a transmission path under the working state, the working state of a power source is changed. The vehicle multi-power source coupled transmission system torsional resonance control method is not only simple and easy to operate and control, the resonance noise can be effectively reduced, and the reliability of the system is improved.

Description

Technical field [0001] The invention relates to the field of vehicle vibration, in particular to a torsional resonance control method of a vehicle multi-power source coupling transmission system. Background technique [0002] Torsional resonance (TR) of a vehicle means that when a vehicle transmission component rotates to transmit torque, it loses balance with the load reaction torque to produce vibration around the axis. When the torsional vibration frequency of multiple transmission components is close to the natural frequency of a certain component Resonance phenomenon generated at the time. Torsional resonance mostly exists in special vehicles that require multi-axle drive and transmission. It also causes instant changes in the torsional stress of the transmission shaft, increases shaft fatigue damage, and causes abnormal noise, which may seriously damage or break the transmission system components. [0003] Because high-power vehicles require a power source to drive, the powe...

AI Technical Summary

Problems solved by technology

Torsional resonance mostly exists in special vehicles that require multi-axis drive and transmission. It also causes instantaneous changes in the torsional stress of the transmission shaft, increases shaft fatigue damage, and causes abnormal noise. Seriously, it may cause damage or fracture of transmission system components.

[0003] Since high-power vehicles need a power source to drive, and the power system involves multi-axis, complex structure, and high-density coupling interference, compared with ordinary vehicles, torsional resonance is more likely to occur and more harmful. US10215091B2 discloses an elastic connection part One end is connected to the body of the variable compression ratio engine, and the other end is connected to the variable compression ratio engine. The mass block is supported by the rod body. There is a multi-link mechanism between the piston and the crankshaft. The rod body has a lower bending and torsional resonance frequency than the variable compression ratio engine. The resonance frequency of the rigid body relies solely on the use of rods with different fixed frequencies to avoid the system resonance caused by the engine, and only considers the natural frequency interference between the rod and the engine

[0004] At present, high-power, high-speed vehicles usually use multiple power sources, and are equipped with high-power diesel engines, electric motors and complex power transmission systems. In this type of vehicle, when different transmission shafts transmit torque, there is usually frequent resonance The frequency point, relying solely on avoiding the "resonance point", is not only difficult, but also complicated to operate

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