A Study On Motion Control Of Virtual Human In Virtual Training Simulation System

Virtual training simulation is training simulation based on virtual reality technique,which is the computer mapping to the taining process. As the virtual technique became more and more mature,a certain trend which virtual human will be embedded in the environment of virtual training simulation, as the expresstion the trainee in the environment of virtual training.Trainee can interact with virtual human in the virtual environment,immersing in it,studying and training.The method of expressing human body model is analyzed and studied in this paper. A better method of expressing solid modeling and multi-rigid-body modeling is selected. And differ degree of jonints and degrees of freedom are predigested.The least human body model fitting virtual training simulation system is established based on the following, virtual human being seen as a multi-rigid-body system and the degree of freedom of each arthrosis being analyzed. The model is composed of 15 joints and 34 degrees of freedom (not including palm).The method of expressing frequently-used virtual human's skelecton structure is studied. A real time controlling model combined parameter keyframe and inverse kinematics is proposed. Regrorse kinematics method can simulate the exact motion of four limbs, as well as is combined with the technology of key frame. In this way, much existed resource of action data can be made use of to prodece lifelike motion. The model of virtual human's tread and climbing the ladder in virtual training simulation system is realized based on such controlling method.The easiest hand control model in virtual training simulation is proposed (taking the right hand that is composed of 6 joints and 14 degrees of freedom as an example). The pollex and common finger parts are analyzed respectively through inverse kinametics to realize the easy action model of virtual hand in virtua training simulation system.