A closed-loop control system for NMR gyroscope with three working media

Abstract

The invention relates to a closed-loop control system for a nuclear magnetic resonance gyroscope of three working media, wherein a gas chamber filled with an alkali metal gas and three working media is arranged in a nuclear magnetic resonance gyroscope device; the three working media make Larmor procession; Larmor procession frequency values omegaa1, omegaa2 and omegaa3 of the three working media are acquired through a signal separator and a frequency comparator; an arithmetic device is used for calculating the temperature T, the magnetostatic field magnitude B0 and the system angular velocity omegaR in the device; a temperature controller is used for controlling a heating chip to keep the temperature T of the nuclear magnetic resonance gyroscope device according to a feedback signal of temperature T; a magnetic field controller is used for controlling the magnetostatic field magnitude B0 in a magnetostatic field coil nuclear magnetic resonance gyroscope device according to the feedback signal of magnetostatic field magnitude B0; a signal generator and a summator are used for controlling the magnitude of the driving magnetic field coil current according to the Larmor procession frequency values omegaa1, omegaa2 and omegaa3 of the three working media and causing the three working media to keep the resonance frequency spot. The closed-loop control system provided by the invention is used for performing closed-loop control on the magnetostatic field and the temperature at the same time, so that higher precision of the system angular velocity can be achieved.

Description

technical field [0001] The invention relates to a gyroscope closed-loop control system, in particular to a nuclear magnetic resonance gyroscope closed-loop control system with three working media. Background technique [0002] The nuclear magnetic resonance gyroscope has the characteristics of small size, low power consumption, high performance, and large dynamics, and has become the research focus of new inertial devices. In general, NMR gyroscopes use two working media, such as 199 Hg and 201 Hg, in the closed-loop situation of the two working media, the system can obtain a stable static magnetic field. [0003] The system of the two working media does not consider the influence of the equivalent magnetic field of the optical displacement, and the optical displacement is related to the temperature change. The static magnetic field of this scheme cannot achieve the ideal effect when the temperature fluctuates, so it is necessary to close the temperature loop. Contents o...

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Problems solved by technology

[0003] The system of the two working media does not consider the influence of the equivalent magnetic field of the optical displacement, and the optical displacement is related to the temperature change. The static magnetic field of this scheme cannot achieve the ideal effect when the temperature fluctuates, so the temperature needs to be closed-loop

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