Sine wave waveform combined compensation method for arresting impact test

Abstract

The invention discloses a sine wave waveform combined compensation method for an arresting impact test, which is characterized by comprising the steps of 1, adding a half-sine wave in front of an original arresting impact waveform to perform speed compensation so as to enable the acceleration amplitude and the table top displacement to be the minimum; 2, adding a complete sine wave in front of thecompensated waveform to perform displacement compensation so as to enable the speed and the acceleration of the table top of the vibration table to be both 0; and 3, carrying out a test according tothe combined waveform after two times of compensation. According to the invention, an arresting impact test can be carried out on part of vibration tables whose speed and displacement do not meet testconditions.

Description

technical field [0001] The invention relates to a sine wave waveform combination compensating method for arresting impact test, which can make the arresting impact test be carried out on a vibrating table whose partial speed and displacement do not meet the test conditions. Background technique [0002] The product needs to be able to work normally under the overload of itself and the external environment, which requires the product to be verified by testing equipment in the laboratory. The arresting landing process is completely different from the landing approach of ordinary aircraft. The aircraft must land on the calibrated glide path, and the aircraft must be decelerated and braked in a short distance by the landing brake arresting cable. The impact load at the moment of the arresting landing and the forced braking load of the arresting cable are quite different from those of the ordinary landing, but the test value during the arresting landing process is higher, the dur...

AI Technical Summary

Problems solved by technology

The impact load at the moment of the arresting landing and the forced braking load of the arresting cable are quite different from those of the ordinary landing, but the test value during the arresting landing process is higher, the duration is longer than the general impact test, and the requirements for the shaking table are higher. If the original arresting shock test waveform is directly used in the product verification process in the laboratory, the acceleration, velocity and displacement curves of the shaking table are as follows: figure 1 , the displacement can reach 900mm. At present, neither the traditional mechanical hydraulic vibration table nor the electromagnetic vibration table can directly carry out the arresting impact test with the original test curve.

[0003] At present, most shaking tables usually use high-pass filtering to process the original curve in this test. This method has two main limitations: 1. After high-pass filtering, part of the high-frequency signal is removed, and the actual test value is lower than the standard requirement, resulting in The actual product is under test

2. The actual vibration balance position of the shaking table during the test process cannot be changed through high-pass filtering, resulting in a waste of actual test resources on the shaking table, and it is difficult to cope with higher-value tests

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