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基于舒勒原理确定惯性元件标度系数的应用研究
Application of inertial sensor scale factor calibration based on Schuler principle
【摘要】 针对平台式惯性导航系统陀螺仪和加速度计在动态使用过程中更换无法重新精确标定的问题,文中提出了利用舒勒周期振荡确定陀螺仪和加速度计标度系数的方法.采用FFT算法实现了系统振荡周期计算,在FFT算法无法满足测量精度的条件下,采用线性调频z变换大大提高了振荡周期测量精度.计算机仿真和试验结果表明:该方法能快速、准确地实现对惯性元件标度系数的标定.
【Abstract】 A new method is provided to recalibrate the scale factor for a gyroscope and accelerometer used in ship navigation systems.The Schuler oscillate period was measured by using fast Fourier transform(FFT) method and measurement precision was enhanced greatly by using chirp z-transform(CZT).Computer simulations and experiment results show that this method can recalibrate the scale factor of an inertial sensor quickly and accurately.
【关键词】 平台式惯性导航系统;
舒勒原理;
惯性元件;
标度因数;
FFT算法;
CZT算法;
【Key words】 inertial navigation system; inertial sensor; scale factor; fast Fourier transform,chirp z-transform;
【Key words】 inertial navigation system; inertial sensor; scale factor; fast Fourier transform,chirp z-transform;
【基金】 国家自然科学基金资助项目(60474046)
- 【文献出处】 哈尔滨工程大学学报 ,Journal of Harbin Engineering University , 编辑部邮箱 ,2006年05期
- 【分类号】U666.12
- 【下载频次】180