Assembly Process Simulation Of Rocket Components And On-site Visualization Technology Application

Assembly is an important part of the product life cycle. It also connects the design and manufacture process. In nowadays, the application of product digital design manufacturing process is more mature than product assembling process. Virtual assembly technology has also made great progress in recent years. The virtual assembly technology can shorten product development cycles, improve assembly quality products, and reduce assembly costs greatly. Therefore the virtual assembly technology has become a hot research the domestic and overseas.This paper focuses on the assembly process simulation of rocket components and on-site visualization technology application. The main contents are as follows:1. Virtual assembly sequence planning of the rocket component is studied in the thesis. By assembling information model and assembly sequence required geometric feasibility analysis, we built rocket component assembly interference matrix, assembly connection matrix and assembly support matrix. To establish the product-level comprehensive evaluation index and calculation method, the objective of assembly geometry feasibility, assembly body stability, and assembly redirection are built. Evaluation index and evaluation function are established for solving ASP problems in product.2. A discrete particle swarm optimization(DPSO) algorithm is proposed to solve the assembly sequence planning problem. To make the discrete particle swarm optimization algorithm effective for solving assembly sequence planning, some key technologies including corresponding operators for updating the position and velocity of particles are introduced. The local convergence problem with discrete particle swarm optimization(DPSO) in ASP, a hybrid discrete particle swarm optimization and gravitational search algorithm is proposed. The performance of the proposed hybrid discrete particle swarm optimization and gravitational search algorithm(DPSO-GSA) is compared with the existing discrete particle swarm optimization algorithm. DPSO-GSA is more efficient to generate optimal assembly sequences.3. The principle of "removable is installable" is used to program the assembly path, based on which the interference collision detection and analysis for the programedvirtual assembly path has been achieved, The ergonomics module in DELMIA is used to analyze and verificate the assemble accessibility, visibility, comfort and security of the assembly model for the rocket components and output assembly simulation animation ultimately.4. Lightweight rocket components assembly model is achieved based on 3DVIA Composer. By analyzing the deficiencies of two-dimensional AO(Assembly Order), the publishing process of three-dimensional AO is accomplished and seamless integration between three-dimensional AO and Word as well as other office software is implemented.