【摘要】 研究用机械旋转和数字滤波的方法提高寻北仪精度.利用连续恒速旋转方法对陀螺信号进行调制,用积分方法进行解调,以抑制陀螺常值漂移、漂移趋势项和刻度因数误差对寻北精度的影响,用设计的低通滤波器对含有随机漂移和系统干扰的陀螺信号进行滤波.实验结果表明这两种措施可有效提高寻北仪方位角估计精度.更多还原

【Abstract】 In order to improve the precision of the north-finder, a method of continuous revolution in constant rate to modulate the signals of the gyro and accelerometer is used, and the signals can be demodulated by an integral method. Thus, the effects of the gyro’s constant drift and low frequency part of random drift are restrained. A low-pass filter is designed to eliminate high frequency disturbance caused by mechanical rotation and gyro noise. Experiment results show that these two measures can increase the precision of the north-finder.更多还原