基于GPS相对伪距差分的相对导航方法研究

研究基于GPS相对伪距差分技术的RVD相对导航方法。分析了在相对位置零位处对相对伪距差分模型进行线性化后的模型误差,并推导了由模型误差所引起的相对导航参数确定误差;提出了模型误差修正方法和采用强跟踪滤波器的非线性滤波方法等两种改进方法。最后,通过数学仿真验证了两种改进方法的有效性。

Study of Relative Navigation Based on Relative Differential Pseudo Range of GPS

The method of RVD relative navigation based on relative differential pseudo range of GPS was studied.Firstly,the model error was analyzed when the measure model was linearized at the zero position of relative position,and the bias of relative navigation parameters caused by model error was also induced.Then two better methods that one of correction of model error and the other of nonlinear filter by Strong Tracking Filter were proposed.Finally,computer simulation shows the feasibility of these new methods.