关键词: 邻域粗糙集, 属性约减, 权重计算, 姿控系统

Abstract: In order to reduce the redundancy of spacecraft attribute value and improve the accuracy of weights calculation, a new method based on rough sets is put forward. By comparing classification accuracy in different lower bounds of importance degree, the new rules for determining the neighborhood radius are given. Based on optimal formula to calculate weights in the view of information, a method to calculate weights of attributes based on information entropy is proposed, and a method for determining weights based on optimal combination of the algebra view and information view is put forward. The balance problem between algebra view and information view is solved. The method is applied to analyze characteristic values for a satellite attitude control system. A comparison with other methods shows that the method can effectively reduce the number of characteristic values and improve the accuracy of feature weights.

Key words: neighborhood rough set, attributes reduction, weights calculation, attitude control system