惯性器件建模对GPS失锁段导航精度的影响

Impact of Inertial Components Modeling on Navigation Accuracy under Circumstance of Loss of GPS Signal

针对INS/GPS组合导航系统在GPS信号失锁的条件下导航精度恶化的问题,分析了惯性器件建模对导航精度的影响程度。通过对传统简化模型和考虑载体机动与环境因素的影响而建立的惯性器件完备模型的仿真,对两种模型在组合断开后的纯惯性导航的水平位置误差进行对比。结果表明相比简化模型相对完备模型可以将水平位置误差的精度提高53%,能有效解决INS/GPS组合导航系统因GPS信号失效后纯惯性系统的定位精度迅速恶化问题。

Focusing on the problem of the deterioration of navigation accuracy of the INS/GPS integrated navigation system under the cir-cumstance of the loss of GPS signal,make an analysis of the effect of the inertial components modeling on the navigation accuracy. By es-tablishing simulation of the perfect model under the consideration of the factors of carrier mobility as well as the environment and the tra-ditional simplified model,conduct the comparison of the horizontal positional error of the pure inertial navigation after the break of the combination. The results show that the perfect model could improve the accuracy of the horizontal positional error to 58% with contrast to the simplified model,what’ s more,it is an effective way to solve the problem mentioned above.