Research On The Key Technologies Of Computer Supported Cooperative Design For Airplane General Arrangement

At the airplane primary design period, massive critical decisions will be made, which decide about 80 percent total life cycle cost of an airplane. The airplane general arrangement design is a key job of the airplane primary design. Traditionally the general arrangement design was carried out in serial design mode. Due to the delay of the communication, inadequacy of coordination and inconsistent of cadence among multidisciplinary design experts, the phenomenon of large-span design changes and redesigns are caused.CSCD technique was introduced into the airplane general arrangement. The abilities to synchronous or asynchronous collaborative design were provided to the multidisciplinary design experts to participate in the airplane general arrangement with the bigger range and flexibility. The goal to improving design quality, reducing development cost and shortening development cycle can be achieved.The main research work includes:1. A general scheme on the cooperative design system for airplane general arrangement was presented. It used a double-bus integration framework based on web services and agent techniques to improve the vertical and lateral integration ability. Combined With workflow techniques and CAD development techniques, the cooperative design system provided the functions for multidisciplinary design experts to synchronous/asynchronous collaborative design in the"arrange-coordinate- arrange"iteration mode.2. To tackle the problems not having explicit semantics and powerful analysis ability of the traditional task decomposition and process modeling methods for airplane design in the cooperative development mode, an airplane general arrangement process modeling method based on task-related WBS and was presented, and a configuration control process modeling method based on Petri net was developed. Using these methods, potential conflictions among the system were avoided which will lead to the rework and redesign, and the deadlock and unreachability within the application of workflow techniques was solved.3. An information cooperative framework for airplane general arrangement was presented. The web services techniques were adopted to support the non-real-time information exchanges. The agent techniques were adopted to support the real-time information exchanges in the CATIA environment. An alterable granularity conflict prevention lock method was adopted to obtain the collision avoidance. The information cooperative framework satisfied the multi-level requirements in airplane general arrangement, and enhanced the expansibility and integration of the cooperative design system.4. The implementation architecture of the cooperative design system for airplane general arrangement was presented. Based on these software development tools including CATIA, CAA, JBPM, Struts and Hibernate, an airplane general arrangement and coordination software prototype CDAGA was developed, which could complete many functions, such as synchronous brows, synchronous arrangement, asynchronous arrangement and coordination and design configuration control management. The effectiveness and applicability of the CDAGA system was verified in a general arrangement application for electron cabin of some airplane forward fuselage.