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陀螺仪的精度与其噪声密切相关,为开发新型高精度的超流体物质波干涉陀螺仪,必须对其噪声进行系统研究。根据超流体陀螺噪声产生的机理,分析了该陀螺噪声的来源,并把超流体陀螺的噪声类型归纳为:热、锁定值波动、温度波动、频率波动和检测元件等。在建立了各噪声数学模型的基础上,利用超流体陀螺通用的参数,对其噪声进行了分析。分析结果表明:热噪声与陀螺的结构参数和工作参数相关,与被测角速度无关;锁定值波动噪声只与结构参数相关;其他噪声与结构参数、工作参数和被测角速度都相关;检测元件、频率波动和锁定值波动噪声是构成超流体陀螺输出噪声的主要因素;在角速度变化量的范围内,超流体陀螺的输出噪声非线性变化,在1Hz的带宽下,其变化范围为-7到-6次方的数量级。
The accuracy of the gyroscope is closely related to its noise. In order to develop a new type of high-precision super-fluid wave interfering gyroscope, the noise must be studied systematically. According to the mechanism of the generation of the superfluid gyroscope, the source of the gyroscope noise is analyzed, and the noise types of the superfluid gyroscope are summarized as: heat, lock value fluctuations, temperature fluctuations, frequency fluctuations and detection components. Based on the mathematical model of each noise, the noise of it is analyzed by using the common parameters of the superfluid gyro. The results show that the thermal noise is related to the gyroscope’s structural parameters and working parameters and has nothing to do with the measured angular velocity. The fluctuating noise of the locking value is only related to the structural parameters. Other noise is related to the structural parameters, working parameters and measured angular velocity. Frequency fluctuation and lock-in value fluctuating noise are the main factors that make up the output noise of the super-hydro-gyro. Within the range of angular velocity variation, the output noise of the super-hydro-gyro changes nonlinearly with a bandwidth of 1 Hz ranging from -7 to - 6 orders of magnitude.