针对提高空间机动目标跟踪精度的机动检测问题，提出一种新型机动检测方法---χ2-β检测法。该算法以脉冲前后沿为研究对象，通过分析观测新息和常推力α-β动力学模型中辅助变量β的物理特性，给出脉冲机动前后沿检测判据。仿真实验比较了χ2检测法和β检测法的特性，结果表明：χ2检测法，对机动前沿的敏感性与采样点和机动阀值相关，较多的采样点与较大的机动阀值可以降低虚警率，但会增加检测延时，反之，可以减小检测延时，但会增加虚警率；β检测法，对机动后沿的敏感性与滤波跟随性能相关，在测量精度的保证下，可对机动后沿准确检测。两种方法联合起来，可有效检测多种形式脉冲机动，性能优于传统的机动检测方法，具有一定的工程实用性。%Aimed at the problem that maneuver detection delay causes the uncertainty of tracking maneuvering target,a combined detection method (χ2 -β)was proposed for tracking maneuvering spacecraft with impulse power.By using Observation Innovation and α-βmaneuver dynamics model,the method detected the impulse maneuver to track maneuvering satellite.Through simulation and analysis,a comparison between the χ2 detection method with βdetection method was made.It proves that the sensitivity ofχ2 detection to maneuvering frontier correlate with the sampling points and motor threshold.The combined detection method does not incur much computation and,is superior to the traditional method, thus it has practicality in satellite engineering.
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