Abstract: Three-dimensional human body sitting model can be used in the design phase of seats to achieve accurate and efficient analysis of seat comfort. A two-dimensional sitting posture template of human body model is taken as reference to define the structure element of the three-dimensional human body sitting model, and a three-dimensional human body model is built by feature-based modeling approach. The three-dimensional human sitting model is driven in parametric way by parametric modeling method based prototype model. Through the geometric model matching between "people-chairs" model, the joint gesture angles of the sitting human body model are extracted automatically. By contrasting the scope of human sitting standard comfort angles, it can analyze and evaluate the seat comfort.

Key words: computer application, seat comfort, three-dimensional human body model, parametric modeling