Fiber optic gyroscope embedded DC-DC (Direct Current-Direct Current) power supply with switching frequency being adjustable in real time

Abstract

The invention discloses a fiber optic gyroscope embedded DC-DC (Direct Current-Direct Current) power supply with switching frequency being adjustable in real time. The optical gyroscope embedded DC-DC power supply comprises a switching frequency feedback control circuit and a DC-DC power supply main circuit, wherein the switching frequency feedback control circuit comprises a modulation-demodulation signal sampling module, a switching frequency resolving module and a switching control signal output module. The DC-DC power supply can build a feedback loop according to a working state of a fiber optic gyroscope in order to realize real-time adjustment of the switching frequency. The switching frequency of a switching power supply can be adjusted in real time; feedback of the switching frequency of the DC-DC power supply can be built according to the working state of the fiber optic gyroscope; the switching frequency of the DC-DC power supply can avoid a modulation-demodulation frequency and a doubled frequency of the modulation-demodulation frequency inside the gyroscope; crosstalk of DC-DC power supply switching ripples on the fiber optic gyroscope is suppressed effectively; and the use accuracy of the gyroscope is increased.

Description

technical field [0001] The invention relates to the technology of a built-in power supply for an optical fiber gyroscope in inertial navigation applications, in particular to a built-in DC-DC power supply for an optical fiber gyroscope with real-time adjustment of switching frequency. Background technique [0002] A direct current-direct current (DC-DC) conversion circuit is a circuit that transforms the direct current energy of one set of electrical parameters into the direct current energy of another set of electrical parameters. Modern DC-DC conversion generally uses switching conversion technology, and the DC-DC converter composed of switching conversion technology is called switching converter or switching power supply. [0003] In a DC-DC switching converter circuit, switching elements are periodically turned on and off. The time the switch is turned on t on and the entire period T s The ratio D is called the duty cycle of the switch on. Controlling the duty cycle ...

AI Technical Summary

Problems solved by technology

[0008] However, the built-in DC-DC power supply of the traditional gyroscope has the following disadvantages: the ripple noise of the built-in DC-DC power supply itself will be coupled into the modulation and demodulation circuit of the fiber optic gyroscope. Noise coupling resonance occurs, and the ripple noise of the DC-DC power supply itself will form crosstalk to the modulation and demodulation circuit, thereby affecting the accuracy of the fiber optic gyroscope modulation and demodulation circuit, thereby reducing the performance of the fiber optic gyroscope

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