The concept of vector relative degree is given, and the invariant property of vector relative degree is obtained. 首先建立了非线性奇异系统的向量相对阶的概念,并给出了系统的向量相对阶的反馈不变性。
Geometry character and invariant character of ship target is analyzed and a united relative invariant moment is used to calculate the feature to meet real-time requirements. 分析了舰船目标的几何特征和不变特征,为满足实时性要求,使用一组统一的相对矩来计算特征量。