摘要
针对离心机试验中惯导平台误差系数辨识问题,提出了一种基于谐波分析辨识误差系数的方法。首先,根据惯性器件误差模型推导了离心机试验下陀螺和加速度计的输出方程,其输出由各阶谐波分量构成。然后通过傅里叶分析得到各项谐波的幅值。最后根据谐波幅值与各项误差系数之间的关系反解得到各项误差系数。仿真结果验证了方法的有效性。
In allusion to identification of error coefficients for inertial navigation platform in centrifuge test, a method based on Fourier analysis was proposed. Firstly, output equation of gyro and accelerometer in centrifuge test was derived according to the error model for inertial device. The output was composed of different order harmonics. Then, the ampli-tude of each order harmonic was obtained by Fourier analysis. Finally, the error coefficients were obtained based on the relationship between harmonic amplitude expressions and error coefficients. The simulation results show that the pro-posed method is effective.
出处
《装备环境工程》
CAS
2018年第1期1-5,共5页
Equipment Environmental Engineering
关键词
惯导平台
离心机试验
误差系数辨识
傅里叶分析
inertial navigation platform
centrifuge test
identification of error coefficients
Fourier analysis
