FIELD: technical acoustics.
SUBSTANCE: studies of power steering in a vehicle. When implementing the method, the vehicle is installed in a hemianechoic chamber on support platforms with a given roughness. A stroboscopic disk is installed on the steering wheel, on the power steering side, and an optical detector is installed on the stationary part of the vehicle facing the stroboscopic disk. An audio frequency spectrum analyzer and a laptop are placed in the cabin, and measuring microphones are placed at control points in the cabin and/or engine compartment. Connect measuring microphones, a spectrum analyzer, a laptop and an optical detector. After warming up the engine, bring it to idle mode. Next, the steering wheel is turned to its extreme left position, a data recording cycle is started on the spectrum analyzer and the steering wheel is rotated clockwise at an angular speed of 180 deg./s for the number of revolutions specified by the test conditions. Then the steering wheel is turned to its extreme right position, the data recording cycle is restarted on the spectrum analyzer and the steering wheel is rotated counterclockwise at an angular speed of 180 deg./s for the number of revolutions specified by the test conditions. The tests are repeated for angular speeds of rotation of the steering wheel of 360 deg./s and 540 deg./s. Control of the angular speed of rotation of the steering wheel, during the implementation of each of the stages, is performed on the basis of readings displayed on the laptop screen and generated on the basis of information read by a diffuse optical detector from a stroboscopic disk. The frequency-amplitude characteristics of the noise emitted by the power steering, recorded by the spectrum analyzer, as well as the angular speeds of the steering wheel that occurred during the tests, are recorded in the laptop memory.
EFFECT: possibility of conducting tests that take into account the influence of the angular speed of rotation of the steering wheel on the acoustic noise emitted by the power steering.
1 cl, 2 dwg
