摘要
针对传统微分器存在噪声放大和时延问题构造的非线性跟踪-微分器。通过离散的载波相位观测量提取载波相位率,并利用跟踪-微分器输出的二阶微分,采取预报的方法进行时延补偿。仿真及车载实验结果表明,该非线性跟踪-微分器能准确快速地跟踪微分信号,对噪声抑制作用良好,时延补偿效果明显,可提高速度测量精度。
To solve the problems of noise amplification and time delay in traditional differentiators, a nonlinear tracking-differentiator is designed. Carrier phase rate is acquired by taking derivatives of discrete carrier phase measurements with the time delay compensated using the second order derivative estimated by the outputs of differentiator. Simulation and experimental results show that the differentiator can track the differential signals rapidly and accurately, and does well in both noise depression and time delay compensation. It is proved that this method helps to improve the accuracy of velocity measurement.
出处
《兵工自动化》
2007年第7期51-53,共3页
Ordnance Industry Automation
基金
教育部高等学校博士学科点专项科研基金(20069998009)
关键词
非线性跟踪-微分器
速度测量
载波相位
时延补偿
Nonlinear tracking-differentiator
Velocity measurement
Carrier phase
Time delay compensation
