Virtual assembly method based on part geometric transformation information

Abstract

The invention discloses a virtual assembly method based on part geometric transformation information. The method comprises the following steps of describing geometric transformation information of a rigid part in a virtual assembly process by defining a main axis and an azimuth axis in a part local coordinate system, and making classification according to the geometric shape and the assembly process of the part; for each part type, proposing a corresponding navigation trigger judgment rule and a navigation motion calculation method. In order to solve the problem that the precision and real-time performance of an existing collision detection technology are difficult to balance, a distinguishing method of normal interference and abnormal interference is provided. The degree of freedom constraint of the part is achieved by conducting motion filtering on the hand grabbing the part at present, and follow-up processing is conducted on the virtual hand; and processing of interchangeable parts in the virtual assembly process is achieved. The method does not depend on force feedback interaction equipment in use, has very good universality, can fully restore real assembly activities, and guarantees the authenticity of a simulation operation process and the accuracy of statistical and analysis results.

Description

technical field [0001] The invention relates to the technical field of virtual assembly based on immersive virtual reality technology, and in particular provides a virtual assembly method based on part geometric transformation information. Background technique [0002] Traditional product assembly design verification and operation training methods based on physical prototypes require extremely high time and money costs, and it has become increasingly difficult to adapt to today's fierce market competition environment. The assembly process simulation method can well overcome these defects, so it has great application potential in the face of such requirements. [0003] However, due to the limitations of the single application direction of the relevant human-computer interaction hardware equipment, poor feedback authenticity, and limited real-time computing power of the computer, it is still difficult for users to completely base on Force feedback is used to feel the motion c...

AI Technical Summary

Problems solved by technology

In the application of such methods, the collision body of the part needs to maintain a high degree of consistency with its mesh model, and when the shape of the part is complex, the collision body with a complex shape will significantly increase the time consumption in the collision detection process, thus seriously greatly affect the real-time performance of the simulation process

In addition, the virtual assembly simulation systems studied in the past are usually developed based on the assembly simulation requirements of a specific mechanical product, and the related simulation methods often lack universality

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