基于微分思想和动态时间弯曲(DTW)的飞行员着舰技能评估研究

Evaluation of pilot landing skills based on differential thinkingand dynamic time warping

针对舰载机着舰训练,提出了一种基于微分思想和动态时间弯曲(dynamic time warping, DTW)的飞行员驾驶技能评估方法。首先,将着舰过程分解为多元时间序列,通过对着舰过程的分析,选取飞行高度、下沉速度和对中偏差等5个特征参数作为指标,并且拟合出各指标的标准曲线;然后,对选取的特征参数进行微分分段处理,利用特征参数间的关系进行降维表示;最后,利用DTW对评估模型进行计算,实现着舰技能的评估。算例分析表明,基于微分思想和DTW方法对飞行员着舰技能评估具有很好的适用性,有利于促进飞行员着舰技能的提高。

Aiming at the landing training of a carrier-based aircraft,this paper proposes a pilot driving skill evaluation method based on differential thinking and dynamic time warping(DTW).Firstly,the landing process is decomposed into multivariate time series.Through the analysis of this process,five characteristic parameters such as flight height,sinking speed and alignment deviation are selected as indicators,and the standard curve of each indicator is fitted.Then,the selected characteristic parameters are differentiated and segmented,and the relationship between the parameters is used for dimension reduction.Finally,DTW is used to calculate the evaluation model to realize landing skill evaluation.The case analysis shows that the method based on differential thinking and DTW has good applicability to pilot landing skill evaluation,which is beneficial to improve pilot landing skills.