CAJ | 학술논문

为满足船用捷联惯性导航系统对准快速性和精确性的要求，提出一种系泊条件下的捷联惯导系统快速初始对准方法。利用三阶调平回路进行水平精对准，直接计算出重力加速度在基座惯性坐标系下的投影，并采用加权求平均算法对重力加速度的投影进行平滑。最后根据惯性系下重力加速度慢速圆锥变化的特性，利用平滑后的重力加速度实现舰载捷联惯导快速初始对准。对所提出的快速对准算法进行了仿真，并利用系泊实验进一步验证了惯性系快速对准方案的可行性。结果表明，所提出的快速对准方法在6分钟内完成了初始对准，且对准精度满足中等精度捷联惯导系统要求。
위만족선용첩련관성도항계통대준쾌속성화정학성적요구，제출일충계박조건하적첩련관도계통쾌속초시대준방법。이용삼계조평회로진행수평정대준，직접계산출중력가속도재기좌관성좌표계하적투영，병채용가권구평균산법대중력가속도적투영진행평활。최후근거관성계하중력가속도만속원추변화적특성，이용평활후적중력가속도실현함재첩련관도쾌속초시대준。대소제출적쾌속대준산법진행료방진，병이용계박실험진일보험증료관성계쾌속대준방안적가행성。결과표명，소제출적쾌속대준방법재6분종내완성료초시대준，차대준정도만족중등정도첩련관도계통요구。
In order to satisfy the requirements of rapid and precise alignment for shipboard strapdown inertial navigation system（SINS）, the fast alignment algorithm based on inertial frame is proposed. The third order leveling loop is used for leveling alignment, then the projection of the gravitational acceleration in the base inertial frame is calculated directly and smoothed based on the average algorithm by weigh- ting. According to the gravitational acceleration presents the coning motion in the inertial frame, by using the information of the gravitational acceleration which has been smoothed, fast alignment for shipboard SINS is accomplished. The alignment method is simulated and a mooring experiment is used to validate the feasibility of the alignment method. Experiment results show that, the precision of the fast initial alignment algorithm achieves the medium navigation accuracy requirement in 6 minutes.