An Improved Gray Similarity Degree with Adaptive Weight for Guidance Simulation Credibility Evaluation

Credibility evaluation of guidance system simulation based on similarity degree is researched. Concerning the engineering problems that similarity degree method is faced, an improved gray similarity degree method combined with variable weight function is presented. Firstly, the ameliorated similarity degree method using for static simulation parameter is built by utilizing the gray measure function of flight data. Then, the sequences coming from dynamic simulation parameters are divided into important region and unimportant region, the un-homogeneous exponential operator as well as the mean operator is applied and the improved similarity degree method using for dynamic simulation parameter is established. Finally, the method is verified through actual measurement data. Practice proves that the improved method can give more creditable evaluation result and have a bright prospect.