Method for improving superfluid gyroscope angular rate measurement accuracy

Abstract

The invention relates to a method for improving superfluid gyroscope angular rate measurement accuracy. The method includes: establishing a sensitive principle equation of a superfluid gyroscope according to the matter wave interference effect; utilizing the principle of locking superfluid amplitude by thermal phase injection, and combining an annular double weak connection structure to establish a thermal phase-temperature relational expression; in a thermally driven double structure superfluid gyroscope system, designing a fuzzy self-adaptive PID controller to overcome the influence of system lagging caused by thermal phase injection; and optimizing fuzzy reasoning PID parameters by genetic algorithm so as to improve the accuracy of the whole superfluid gyroscope measurement system. The method provided by the invention belongs to the technical field of new concept ultrahigh accuracy gyroscopes, and can be applied to high accuracy detection of superfluid gyroscopes.

Description

technical field [0001] The invention relates to a method for improving the measurement accuracy of the superfluid gyroscope angular rate, which is suitable for high-precision detection of the superfluid gyroscope. technical background [0002] Inertial navigation technology is one of the key technologies for high-performance equipment such as space stations, satellites, missiles, ships, and robots. As the core detection device of the inertial navigation system, the gyroscope has experienced the development stages of liquid floating gyroscope, disturbance gyroscope, laser gyroscope and fiber optic gyroscope since the advent of mechanical gyroscope in the 19th century. With the rapid development of gyroscopes, the size, accuracy, fast maneuverability and environmental adaptability of inertial navigation systems have been greatly improved. However, the existing gyroscopes still have some deficiencies in terms of accuracy, volume and cost. For this reason, researchers are tryi...

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Problems solved by technology

To solve this problem, the existing methods set the operating point phase in advance and realize thermal compensation through thermal phase injection. The amplitude locking method not only solves the problem of small range for the double weakly connected superfluid gyroscope, but also solves the problem. The problem that the original system cannot judge the direction of the variable input angular rate

However, the heating process of the heating resistor used can actually be approximated as a first-order inertial link. Then there will be an inertial delay in the injection of the thermal phase, which will cause the amplitude of the superfluid to not be locked at the target position, and even cause system instability, which will directly affect the detection accuracy of the superfluid gyro

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