无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2014年
4期
28-31
,共4页
“快照” RAIM%多元累积RAIM%马尔科夫链%平均运行长度
“快照” RAIM%多元纍積RAIM%馬爾科伕鏈%平均運行長度
“쾌조” RAIM%다원루적RAIM%마이과부련%평균운행장도
“snapshot” RAIM%MCRAIM%Markov chain%average run length
基于奇偶空间的“快照” RAIM算法利用冗余GPS卫星，可以一步检测系统的较大偏差故障，但对中等的累积型故障不具备检测能力。利用多元累积和检测冗余方程的奇偶残差向量，得到了一种新的RAIM算法---多元累积RAIM （ Multivariate Cumulative RAIM， MC-RAIM），并将平均运行长度（ Average Run Length， ARL）作为该算法性能判决的指标，根据Markov链的状态转移矩阵计算不同维数、窗口参数和报警门限下的ARL，通过仿真实验证明该算法对于GPS系统的中等累积型故障具有检测能力，弥补了原有RAIM算法的缺陷。
基于奇偶空間的“快照” RAIM算法利用冗餘GPS衛星，可以一步檢測繫統的較大偏差故障，但對中等的纍積型故障不具備檢測能力。利用多元纍積和檢測冗餘方程的奇偶殘差嚮量，得到瞭一種新的RAIM算法---多元纍積RAIM （ Multivariate Cumulative RAIM， MC-RAIM），併將平均運行長度（ Average Run Length， ARL）作為該算法性能判決的指標，根據Markov鏈的狀態轉移矩陣計算不同維數、窗口參數和報警門限下的ARL，通過倣真實驗證明該算法對于GPS繫統的中等纍積型故障具有檢測能力，瀰補瞭原有RAIM算法的缺陷。
기우기우공간적“쾌조” RAIM산법이용용여GPS위성，가이일보검측계통적교대편차고장，단대중등적루적형고장불구비검측능력。이용다원루적화검측용여방정적기우잔차향량，득도료일충신적RAIM산법---다원루적RAIM （ Multivariate Cumulative RAIM， MC-RAIM），병장평균운행장도（ Average Run Length， ARL）작위해산법성능판결적지표，근거Markov련적상태전이구진계산불동유수、창구삼수화보경문한하적ARL，통과방진실험증명해산법대우GPS계통적중등루적형고장구유검측능력，미보료원유RAIM산법적결함。
The algorithm of “snapshot” receiver autonomous integrity monitoring ( RAIM ) based on parity space can detect the deviation fault of system within one step,but can’t detect the cumulative fault by using redundant GPS satellite.The multivariate cumu-lative RAIM ( MC-RAIM) is deduced by using multivariate cumulative sum to check the parity residual error of GPS redundant equa-tion.The average run length (ARL),used as the performance index of this algorithm,is computed by Markov state transfer matrix under the different condition of window coefficient and alarm threshold.The simulation experiment proves that this algorithm can detect medium cumulative fault and made use of redundant GPS to compute parity residual error,which could detect system fault within one step,but lost the capability for cumulative fault.the multivariate cumulative RAIM (MC-RAIM) Arithmetic was deduced,which using,and using average run length(ARL) as the performance index,which was computed by the.Finally,it was proved that this new Arithmetic could detect medium cumulative fault by the way of simulation and cover the shortage of “snapshot” RAIM.
