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为了提供更精确的完好性服务,提出一种新型降低用户端自主完好性监测(receiver autonomous integrity monitoring,RAIM)误警率的方法。给出了定位误差与残差向量关系的新解释,基于最大定位误差完好性风险算法,提出了扩展正常检测区方法并进行故障检测,通过最大定位偏差保护限值提供故障检测的完好性保证,满足航段漏警率要求。最后,设计一种新的故障检测与故障识别准则,达到在不降低漏检率的条件下,减少误警率。算例表明该方法简单易行、有效。
In order to provide a more accurate and complete service, a new method to reduce the false alarm rate of receiver autonomous integrity monitoring (RAIM) is proposed. A new interpretation of the relationship between positioning error and residual vector is given. Based on the algorithm of maximum positioning error integrity risk, a method of extending the normal detection zone and detecting faults is proposed. The integrity guarantee of fault detection is provided by the maximum positioning deviation protection limit. Satisfy segment leakage rate requirements. Finally, a new fault detection and fault identification criterion is designed to reduce the false alarm rate without reducing the missed detection rate. The example shows that the method is simple and effective.