Tilt feedback control method and control system for gravimeter, terminal and medium
A technology of feedback control and control system, applied in the terminal, control system, tilt feedback control method of gravimeter, and medium field, can solve problems such as long adjustment time, failure to meet tilt control, liquid leakage of hydraulic transmission device, etc., to achieve adjustment short time effect
Pending Publication Date: 2022-01-18
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
Most of the above inclination control accuracies are on the order of 100μrad, which cannot meet the requirements of tilt control on the order of μrad.
[0005] Through the above analysis, the existing problems and defects of the prior art are: the tilt control accuracy of the existing gravimeter is not enough, and the adjustment time is long
[0006] The inclination of the sensitive axis direction of the instrument will cause the change of the observed gravity value and affect the drift of the instrument
[0007] The problem of fluid leakage in hydraulic transmission is unavoidable
Method used
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[0064] The present invention provides a tilt feedback control method for a superconducting gravimeter. The tilt feedback control method for a superconducting gravimeter includes the following steps:
[0065] Step S10, establishing a deviation model between the direction of the sensitive axis of the gravimeter and the direction of gravity g, so as to determine the precision of the tilt feedback control: the deviation model is as follows figure 2 shown.
[0066] in represents the local gravity direction, θ 0 Represents the initial deviation angle of the gravimeter installation, and θ represents the time-varying inclination angle. Initial deviation angle θ 0 The value of is related to the initial installation error, and the value of the time-varying inclination angle θ is related to the inclination change of the installation base platform over time. The values of the initial deviation angle and the time-varying inclination angle are both on the milliradian scale, which ca...
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The invention belongs to the technical field of inclination control of gravity measuring instruments, and discloses an tilt feedback control method and control system for a gravimeter, a terminal and a medium, and the tilt feedback control method for the gravimeter comprises the steps: building a deviation model of the sensitive axis direction and the gravity direction of the gravimeter, and determining the inclination feedback control precision; determining a gravimeter supporting mode and a cross coupling coefficient; selecting key components according to control requirements; determining a PID feedback control logic diagram, building a PID feedback control system, and performing tilt feedback control on the gravimeter. The PID feedback control system is a two-channel PID control system and is used for controlling inclination angles theta X and theta Y at the same time; mutually coupled parameters are set in the two-channel PID control system. According to the tilt feedback control method and control system for the gravimeter, the tilt control of the mu rad magnitude can be realized, and meanwhile, the adjustment time is short.
Description
technical field [0001] The invention belongs to the technical field of tilt control of gravity measuring instruments, and in particular relates to a tilt feedback control method, a control system, a terminal and a medium for a gravimeter. Background technique [0002] At present, the superconducting gravimeter (Superconducting Gravimeter, SG) is a precision relative gravity measuring instrument constructed by superconductivity. It works at the temperature of 4.2K liquid helium, has the characteristics of low inherent noise and good stability, and is widely used in geodynamics. Scientific analysis, major natural disasters and early warning and other fields. [0003] One of the keys to gravity measurement is to ensure that the direction of the sensitive axis of the gravimeter is consistent with the direction of the local gravitational acceleration g, otherwise it will lead to changes in the observed gravity value and affect the drift of the instrument. Assuming that the angle...
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Login to View More IPC IPC(8): G01V13/00
CPCG01V13/00
Inventor 张宁杨继逸陈高俊刘路陈亮刘向东
Owner HUAZHONG UNIV OF SCI & TECH