Generalized prediction control method for electromagnetic vibroseis on complicated surface condition

A generalized predictive control and complex surface technology, which is applied in the field of electromagnetic vibroseis control, and can solve the problems of difficult realization of high-frequency vibroseis, poor real-time performance, and large amount of computation.

Active Publication Date: 2016-03-30
JILIN UNIV
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Problems solved by technology

CN104570053A discloses a "Generalized Predictive Control System for Vibroseis", which can satisfy t

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  • Generalized prediction control method for electromagnetic vibroseis on complicated surface condition
  • Generalized prediction control method for electromagnetic vibroseis on complicated surface condition
  • Generalized prediction control method for electromagnetic vibroseis on complicated surface condition

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Embodiment Construction

[0047] Below in conjunction with accompanying drawing and embodiment for further detailed description:

[0048] When the electromagnetic vibrator is working, the signal acquisition system collects the excitation signal in real time through the sensor installed on the vibrator, and obtains the excitation signal of the vibrator through signal processing. The signal first passes through a zero-phase low-pass filter, and after passing through Zero detection and peak detection respectively control the phase and amplitude of the vibrator through the generalized predictive control method.

[0049] The electromagnetic vibroseis generalized predictive control method based on complex surface conditions includes the following steps:

[0050] a. In the laboratory environment, test the ground excitation frequency sweep signal s during the working process of the vibrator through the sensor and signal acquisition system placed on the vibrator 1 (t), the comparison s is detected by the zero-...

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Abstract

The invention relates to a generalized prediction control method for an electromagnetic vibroseis on a complicated surface condition. On the basis of combination of a generalized prediction control method with phase pre-compensation and zero-phase filtering methods, the generalized prediction control method for an electromagnetic vibroseis in a complicated surface environment is designed. Detection on the signal peak and phase is realized by the digital way; and compared with the analog zero-crossing comparison and peak detection way, the employed way enables a high-precision control problem of the electromagnetic vibroseis on the complicated surface condition to be solved effectively. The amplitude and phase of the excitation signal of the electromagnetic vibroseis are controlled respectively and independently and a phase pre-compensation link is added, so that the control difficulty is reduced, the computation load is reduced, and the real-time performance of control is enhanced. The real-time control can be realized conveniently. Moreover, the generalized prediction control method does not rely on a fixed model and is used for realizing high-precision control of the electromagnetic vibroseis under the complicated surface, thereby improving the precision of seismic exploration of the electromagnetic vibroseis.

Description

Technical field: [0001] The invention relates to an electromagnetic vibrator control method, in particular to an electromagnetic vibrator generalized predictive control method suitable for complex surface conditions. Background technique: [0002] Electromagnetic vibroseis is an important instrument used in shallow seismic exploration. It can achieve the effect of instantaneous high-power seismic waves impacting the source by exciting small-energy seismic waves to the ground for a long time and through related compression. However, under complex surface conditions, the coupling between the base plate and the ground is poor, and the seismic signals excited by the vibrator always have serious distortions in phase and amplitude, resulting in large positioning errors in seismic exploration and a decrease in the accuracy of seismic exploration. Foreign vibrator feedback control generally adopts a simple phase-locked control system; in 1988, Sercel developed a linear Gaussian qua...

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Application Information

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IPC IPC(8): G01V1/02G01V1/04
CPCG01V1/02G01V1/04
Inventor 姜弢马瑞琪徐学纯姚恩超林君贾海青
Owner JILIN UNIV
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