惯性辅助超短基线GPS航姿解算

Inertialaided GPS Heading and Attitude Resolution with Ultrashort Baselines

ＧＰＳ航姿系统是利用ＧＰＳ 载波相位相对测量来确定载体的航向和姿态。对于只有２ ～３ 个载波波长的超短基线，载波相位初始模糊度的确定将变得容易，而且这样的超短基线有利于周跳的检测，但超短基线使航姿解算精度较低。为了提高航姿解算的精度和可靠性，本文提出了ＧＰＳ航姿和低精度陀螺的组合系统，并进行了仿真研究。

The GPS heading & attitude system determines the heading & attitude of the vehicle by using GPS carrier phase relative measurements.For the ultrashort baseline with only 2～3 carrier wavelengths,the determination of initial ambiguity of carrier phase becomes easy,and this kind of ultrashort baseline is useful in detecting cycleslip.But the ultrashort baseline would decrease the solution accuracy of heading & attitude.In order to improve the accuracy and reliability of the heading & attitude solution,an integrated system of a GPS heading & attitude system and a lowaccuracy gyro is presented in this paper and its simulation study is carried out. short baseline would decrease the solution accuracy of heading & attitude.In order to improve the accuracy and reliability of the heading & attitude solution,an integrated system of a GPS heading & attitude system and a lowaccuracy gyro is presented in this paper and its simulation study is carried out. accuracy gyro is presented in this paper and its simulation study is carried out.