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为进一步提高导航接收机完好性性能,满足精密进场导航需求,在研究最小二乘残差的导航接收机自主完好性检测算法基础上,提出了一种利用风险代价函数模型来确定故障检测最佳门限的方法,新的方法从风险代价角度寻求最佳故障检测门限,从而在误警率与漏检率的矛盾统一体中找到了一个最佳平衡点,仿真结果表明了改进的导航接收机自主完好性检测算法在风险代价角度有效地降低了系统的漏检率和误警率。
In order to further improve the integrity of navigation receiver and meet the requirements of precision approach navigation, based on the study of autonomous integrity detection algorithm of navigation receiver with least square residuals, this paper proposes a risk cost function model to determine the best fault detection Good threshold method, the new method to find the best fault detection threshold from the perspective of risk cost, thus finding an optimal balance point in the contradictory unity of false alarm rate and missed detection rate. The simulation results show that the improved navigation receiver Autonomous integrity detection algorithm effectively reduces the system’s missed detection rate and false alarm rate from the perspective of risk.