Time History Recurrence Control Method for Continuous Vibration Signals

Abstract

The invention discloses a continuous vibration signal time history replication control method which is realized by software arranged in a control system. The continuous vibration signal time history replication control method comprises the following steps of target signal processing; system self-checking; initial transfer function estimation; and time domain vibration control which includes the steps that current driving frame data are transmitted in real time; a system transfer function is identified by the previous frame of data, and interpolation and updating are performed on the transfer function; and next frame of driving signals are calculated. A better vibration control method aiming at a continuous vibration mode is provided on the basis of frequency domain digital iteration control. The time domain control method is adopted so that control is stable, vibration time history replication control precision is great, the method is suitable for continuous random, sine and other vibration tests, and transport, flight vibration, airborne and ship-based time history vibration environments can be more truly simulated.

Description

technical field [0001] The invention relates to a method for reproducing the time history of continuous vibration signals with electric or hydraulic vibration tables (with products), vibration excitation systems and vibration exciters as the control objects, especially suitable for road transportation simulation, airborne vibration simulation, weapon The vibration control aspects of flight vibration simulation and earthquake simulation that accurately reproduce the time history of continuous vibration signals belong to the field of automatic control technology. Background technique [0002] Vibration test is a necessary measure to test product reliability, expose structural materials and process defects, and analyze mechanical vibration characteristics. It is also an important means to solve various mechanical and structural vibration problems; It is a necessary means for different scenarios, such as vehicle, locomotive and high-speed rail transportation simulation, airborne...

AI Technical Summary

Problems solved by technology

In the test process, we start from the low level, carry out multiple pre-tests, and finally reach the full-scale test. In this way, there is obviously a problem of over-testing in the assessment of specimens or products, so that many tests (such as earthquake simulation of soil models) ) is forced to use simulation parts for pre-test or reduce the number of pre-iterations by losing control accuracy to solve the problem of over-testing

[0004] At present, vibration controller products include domestic Yiheng and Tengzhen controllers, and international SD, DP and LMS controllers with vibration control functions, all of which are traditional vibration control functions including random, sine, random plus sine , random plus random, classical shock, shock response spectrum and waveform reproduction, etc., do not have the control function of continuous vibration time history signal reproduction

In addition, Moog Corporation of the United States is at the international leading level in the field of automobile testing and testing. The road simulation test system developed uses the continuous vibration time-history signal simulation control technology, but its core algorithm is packaged in the control software and has not been disclosed to the public. The test method Also requires initial iterations and cannot be scaled up

[0005] After searching the patent literature, there is no other published relevant literature on the time history recurrence control method of continuous vibration signal, let alone the application of the relevant method in actual work

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