Multi-dimensional sinusoidal vibration control method and control apparatus

Abstract

The invention discloses a multi-dimensional sinusoidal vibration control method and control apparatus. The apparatus comprises an upper computer, a PXI real-time controller, a data acquisition card, an acceleration sensor and a displacement sensor. The method includes the steps of system parameter setting, system self detection, system identification, sinusoidal vibration frequency starting, sinusoidal frequency sweeping, and test completing and stopping after frequency sweeping, thereby realizing control on the control apparatus. According to the invention, the control is stable; the apparatus has good sinusoidal vibration control capability from one dimension to six dimensions and is suitable for the multi-dimensional sinusoidal vibration control or sinusoidal test. In addition, different initial phases can be set for different control dimensions to form the sinusoidal vibration or motion under several kinds of combination modes. Meanwhile, an amplitude identification technology based on combination of an FFT and a filter, a semi-sinusoidal-window stable frequency starting technology, a multi-dimensional driving amplitude on-line updating method, and an acceleration and displacement mixed control method are used for obtaining a satisfying testing effect. Moreover, the apparatus has advantages of simple system, less modules, easy installation, and convenient maintenance.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a multi-dimensional sinusoidal vibration control method and control device with a hydraulic or electric vibration table, a vibration excitation system and a vibration exciter as control objects. Background technique [0002] Sinusoidal vibration test is a necessary measure to test product reliability, expose structural material and process defects, and analyze mechanical vibration characteristics. It is also an important means to solve various mechanical and structural vibration problems. At the same time, the sinusoidal vibration test is also an important vibration simulation test that simulates sinusoidal characteristics such as rotating machinery, helicopter rotors, high-speed rail locomotive pantographs, and low-frequency ships at sea. Limited by theory, technology and equipment in the early stage, only single-shaking table uniaxial vibration test can be carried out...

AI Technical Summary

Problems solved by technology

However, the multi-dimensional sinusoidal vibration controller has not launched mature products in China so far, and its controllers are all imported from abroad, such as the controllers of SD and LMS companies in the world.

Due to the control software packaged in foreign controllers, its core algorithm is not open to the outside world and its functions are fixed, which makes it difficult for users to use in many applications (such as too strict requirements on the background noise of the system, excessive low-frequency displacement in the pre-test, and high-frequency startup. overshoot, etc.)

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