公开(公告)号：US3925643A

公开(公告)日：1975-12-09

申请号：US46919074

申请日：1974-05-13

Applicant: UNITED TECHNOLOGIES CORP

Inventor： ROANTREE JAMES P ,  SAUNDERS JOHN ,  BAUM ROBERT A

IPC: G01C19/04 ,  G01C19/42 ,  G06F15/50

CPC classification number: G01C19/04 ,  G01C19/42

Abstract: Drift components in the output of a gyro in a strapdown inertial navigation system are measured by modulating the speed of the gyro wheel in a sinusoidal manner. True angular motion components acting on the gyro are modulated in proportion to the modulation of the wheel speed, while drift components which act on the gyro and which are independent of true motion and wheel momentum are not modulated. By the use of a drift calculator or selected bandpass filters responsive to the modulated output from the gyro, the drift component and true angular motion component may be separated, and the navigation system may be compensated for drift. A unique linear-parabolic modulator produces a digital output equivalent to a sinusoid which may be used to modulate the gyro wheel speed in the appropriate manner.

Abstract translation: 通过以正弦曲线的方式调节陀螺轮的速度来测量捷联惯导系统中的陀螺仪的输出中的漂移部件。 作用在陀螺仪上的真实的角运动分量与轮速的调制成比例地调制，而作用在陀螺仪上并且与真实运动和车轮动量无关的漂移分量不被调制。 通过使用响应于来自陀螺仪的调制输出的漂移计算器或选定的带通滤波器，可以分离漂移分量和真实角运动分量，并且可以补偿导航系统的漂移。 独特的线性抛物线调制器产生等效于正弦曲线的数字输出，其可用于以适当的方式调制陀螺轮转速。