给出可能性测度、模糊数、三角模糊数的定义，引入模糊机会约束规划的模型和解法。
Propose the definitions of possibility measure, fuzzy number, triangle fuzzy number, introducing the model and algorithm of fuzzy chance constrained programming.
理论分析结果表明，两位置对准可以提高系统状态变量的可观测度，尤其对加速度计误差和方位失准角的可观测度提高作用明显。
Theory analysis showed that the method of two-position alignment increases the observability degree of state variables, especially for the error of accelerometer and azimuth misalignment.
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