航空附件平行轴传动系统方案设计的智能化方法

Method of Scheme Generation for Aero-engine Accessory Parallel Shaft Drive System

以航空发动机附件平行轴传动系统为研究对象,探讨了附件之间干涉和传动链传动设计准则对传动系统布局的影响。将附件传动系统视为单输入单元和多输出单元的黑箱,可行传动方案为遍历各单元的无内环路径。参考TSP(Traveling salesman problem)路径规划算法,运用图论知识可以确定表示单元之间关联疏远程度的邻接矩阵。采用广探法得到满足多约束条件的所有可行传动路径,并建立图论中单元节点度与传动形式的关系,实现了平行轴传动系统方案的自动布局。根据不同目标下最优约束条件,在可行方案中可自动获得最优方案。通过以传动链体积最小为目标的六轴附件传动方案设计实例,验证了该方法的有效性。

A new intelligent method of transmission scheme for aero-engine accessory drive system with parallel shafts system is investigated, Considering the influence of both attachment interference and the design criterion of transmission, the drive system of attachments is regarded as a single-input and multi-output black box. By using the knowledge of graph theory, the adjacency matrix is defined, then referring to TSP （Traveling Salesman Problem） , the weight of the attachment node path can be determined except the possibility of forming a transmission chain between attachment units that contrary to the criterion. The feasible layout schemes of the parallel shafts transmission system for aero-engine accessory are obtained by using Breadth First Search. The different degree of any units is connected with various driving modes. The optimal scheme is obtained automatically from feasible schemes under the target of smallest drive chain volume. The validity of the intelligent scheme design method is verified by the example of six-shafts attachments transmission scheme design.