A Calculation Method for Mounting Vibration Isolation under Accelerated Conditions Excluding Road Surface Excitation
An accelerated working condition and suspension technology, applied to measuring devices, complex mathematical operations, instruments, etc., can solve problems such as inaccurate vibration isolation
Active Publication Date: 2022-05-03
拾音汽车科技(上海)有限公司
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Problems solved by technology
[0002] The existing formula for calculating the vibration isolation of the mount under acceleration conditions is 20log(VES / VBS), where VES is the vibration of the active end of the mount, and VBS is the vibration of the passive end of the mount. The existing calculation method has problems: it cannot be avoided The impact of road surface excitation on vibration isolation calculations leads to inaccurate calculated vibration isolation. The vibration isolation of the mount under acceleration conditions is the case of high engine torque output. The attenuation ability of the engine excitation when the mount is under pressure is investigated.
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Embodiment 1
[0019] Such as Figure 1-2 As shown, the present invention provides a method for calculating vibration isolation of a mount under acceleration conditions without road surface excitation, comprising the following steps:
[0020] 1) Arrange acceleration vibration sensors at the active and passive ends of the mount, use GPS to monitor the vehicle speed, and use the CAN line to monitor the engine speed. In the LMS software, set the tracking mode to Up / Down to track the vehicle speed;
[0021] 2) Continuously test the acceleration, neutral stall and coasting conditions, and collect the vibration of the active and passive ends of the mount: the vibration of the active end of the mount under the acceleration condition is recorded as V WOT_ES , the vibration of the passive end of the mount under accelerated conditions is denoted as V WOT_BS , and the vibration of the active end of the suspension under the neutral sliding condition is denoted as V FD_ES , and the vibration of the pas...
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The invention discloses a vibration isolation calculation method for a mount under acceleration conditions without road surface excitation, comprising the following steps: 1) Arranging acceleration vibration sensors at the active and passive ends of the mount, using GPS to monitor vehicle speed, and using CAN lines to monitor the engine Rotational speed, in the LMS software, set the tracking mode to Up / Down to track the vehicle speed; 2) Continuously test the acceleration, neutral stall and coasting conditions, and collect the vibration of the active and passive ends of the mount; 3) The test results of the active and passive The end vibration signal is a mixed signal of engine excitation and road surface excitation. The present invention suspends the calculation of the vibration signals of the active and passive ends through the acceleration working condition and the neutral stall flameout sliding working condition: V WOT_ES -V FD_ES , V WOT_BS -V FD_BS , to get the vibration signals of the main and passive ends of the mount excluding the road excitation, which can separate the road excitation components in the vibration of the active and passive ends of the mount obtained from the test, and obtain pure engine excitation, so as to calculate the mount that excludes the influence of road excitation The amount of vibration isolation.
Description
technical field [0001] The invention relates to the field of automobile driving, in particular to a calculation method for suspension vibration isolation under acceleration conditions without road surface excitation. Background technique [0002] The existing formula for calculating the vibration isolation of the mount under acceleration conditions is 20log(VES / VBS), where VES is the vibration of the active end of the mount, and VBS is the vibration of the passive end of the mount. The existing calculation method has problems: it cannot be avoided The impact of road surface excitation on vibration isolation calculations leads to inaccurate calculated vibration isolation. The vibration isolation of the mount under acceleration conditions is the case of high engine torque output. The attenuation ability of the engine excitation when the mount is under pressure is investigated. . In the vibration of the active and passive ends of the suspension obtained from the test, in addit...
Claims
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IPC IPC(8): G06F17/10G01H17/00G01S19/52
CPCG06F17/10G01H17/00G01S19/52
Inventor 薛顺达王立星沈平木标
Owner 拾音汽车科技(上海)有限公司