Research On Man-Machine Interaction Technology For Virtual Assembly System Of Large-Scale Products

Large-scale products, such as planes, rockets, weapons and so on, are complicated in structures and constitute various parts and components. It is rather difficult to manufacture, especially to assemble them. Virtual assembly (VA) provides an effective solution to the design for assembly and assembly process planning of these products. Different from pipeline operation, during the assembly of large products, the main frames of products are usually fixed and the operators are demanded to move around the working positions. Traditional interactive systems for VA does not take account of the actual moving range space of operator and the operator is either fixed or walking in a limited space, which are clearly distinct with the actual working conditions.To solve the problem above, a new man-machine interactive system that can realize the operator's free walking is put forward and the system architecture and key techniques involved are explored. In this new system, a special motion perception machine is designed to implement the operator's walking activities and the actual moving of the operator is just limited in the platform of the machine, by which the actual walking activities and virtual wandering of the operator are effectively associated. At the same time, the projection system consisting of several projectors casts the 3D virtual scenes produced by the computers onto the large spherical screen surrounding the operator to generate fairly strong immersion sense for the operator.By investigating the actual walking activities of people and acquiring the walking data, the new motion perception machine is designed, the software and hardware of the machine are also developed. Limited in the scope of the machine platform, the operator is able to walk straightly and turn around freely. Two independent pedals are adopted to support the operator's feet. According to the position informations from the 3-D tracker bound on the feet of the operator, the servomotors can be controlled to drive the pedals to follow the operator's feet. The actual walking experiments show that satisfied walking activities can be obtained on this machine.Because the diameter of the spherical screen in the new interactive system is...