CAJ | 학술논문

针对全球定位系统接收机观测噪声分布的特点和基本粒子滤波存在的粒子退化与采样枯竭问题，提出了一种基于遗传算法进行再采样粒子滤波与似然比方法有机结合的全球定位系统接收机自主完好性监测方法。建立了卫星故障检测的检验统计量，通过比较系统各状态累加对数似然比对卫星故障进行检测。将遗传算法中的选择、交叉和变异操作融入到粒子滤波中，提高了粒子滤波的精确性，在实数域内对粒子进行遗传操作，避免了遗传操作的编解码。实验表明，该算法在非高斯测量噪声下成功地检测并隔离故障卫星，提高了故障检测的性能，验证了该算法应用于全球定位系统接收机自主完好性监测的可行性和有效性。
침대전구정위계통접수궤관측조성분포적특점화기본입자려파존재적입자퇴화여채양고갈문제，제출료일충기우유전산법진행재채양입자려파여사연비방법유궤결합적전구정위계통접수궤자주완호성감측방법。건립료위성고장검측적검험통계량，통과비교계통각상태루가대수사연비대위성고장진행검측。장유전산법중적선택、교차화변이조작융입도입자려파중，제고료입자려파적정학성，재실수역내대입자진행유전조작，피면료유전조작적편해마。실험표명，해산법재비고사측량조성하성공지검측병격리고장위성，제고료고장검측적성능，험증료해산법응용우전구정위계통접수궤자주완호성감측적가행성화유효성。
According to the measurement noise feature of the GPS receiver and the degeneracy phenomenon and for alleviating the sample impoverishment problem in the particle filter (PF), the GPS receiver autonomous integrity monitoring (RAIM) method based on an algorithm combining the genetic resampling particle filter with the likelihood ratio is presented. By setting up the test statistic of satellite fault detection,satellite fault detection is undertaken by checking the cumulative log-likelihood ratio (LLR) of system states.The selection,crossover and mutation of the genetic algorithm are melted into the particle filter,the accuracy of the particle filter is improved,and the genetic of particles is manipulated in the real domain.However,the coding of genetic manipulation is avoided.Simulation results demonstrate that the proposed algorithm can effectively detect and isolate fault satellite and improve the detection performance under conditions of non-Gaussian measurement noise.Therefore,the feasibility and validity of the proposed algorithm for RAIM are verified.