The mechanical automobile simulation test bench later developed a mechanical automobile simulation test bench to test the entire product. Using a gear-chain drive, the wheel drum garden is divided into six zones at equal intervals. Tiles may be placed on each zone, and the shape of the tiles is also complicated. Placed on the drum is a trolley or two-axle car.
Correctly simulating vibration requires not only that the simulation station generates a random vibration that is consistent with the actual distribution in the amplitude domain, but also that the acceleration power spectral density map is consistent with the experimental conditions, which is simply not possible on a simple mechanical simulation platform. By adjusting the rotation speed, the shape and placement of the tiles on the drum, the load on the trailer, and the following five indicators are consistent with the actual measurements, the field transport test environment was considered to be moved to the laboratory simulation. The five indicators are:
(1) The average value (mathematical expectation) of the peak value (or valley value) of the random variable recorded by the simulation table is equivalent to the actual measurement.
(2) The first-order moment (variance) test of the peak is equivalent to the actual measurement. (1), (2) Two, indicating that the simulated peak random variables are in the same distribution as the actual measurements.
(3) The main frequency range on the acceleration power spectrum is comparable to the actual measurement.
(4) Power spectral density values ​​at the main frequency) G1(f) and G2(f), the test is equivalent to the actual measurement. (3), (4) Two, indicating that the energy concentration in the main frequency range is consistent.
(5) The rms acceleration of the acceleration time history is comparable to that of the actual measurement. This shows that the total power of the simulation table to the test specimen is consistent with the actual measurement.
Due to the lack of mathematical descriptions between the above five indicators and the debugging parameters, there is a lot of blindness in the process of debugging and debugging, and the workload is large. It is often the case that this indicator satisfies, while the other indicator is not satisfied.
Packaging film needle roll equipment, film needle roll equipment, plastic film automatic needle roll equipment, Opp film needle roll equipment, automatic needle roll equipment
Changzhou Puyisen Machinery Technology Co., Ltd. , https://www.pysmachine.com