Research On Virtual Human Technology For Chemical Accident Simulation Training

As the chemical production process becomes more and more complex,chemical safety accidents also occur frequently,which requires people engaged in the chemical industry to have a higher ability to deal with chemical accidents.At the same time,it also requires related institutions to pay more attention to training students' ability to deal with chemical accidents.However,at present,the training of trainees' ability to deal with chemical accidents mainly adopts semi-physical,2D and 3D simulation methods.In the course of these chemical accident simulation trainings,the trainees are mainly trained through some data to simulate chemical accidents and roaming explanations.The simulation environment lacks some breath of life.The training process is boring,lacks humanized interaction of multi-person collaboration,and the user's true perception of the environment is poor,resulting in unsatisfactory results of chemical accident simulation training.Aiming at the current situation of chemical accident simulation training,the virtual human technology is studied and applied to the chemical accident simulation training system,and a chemical accident simulation training system based on the virtual human technology is designed.The main research contents are as follows:(1)The virtual human motion switching technology for chemical accident simulation training is studied.In order to ensure that the virtual human has a realistic visual effect in the chemical accident simulation training system,and that the virtual human conforms to the movement law in reality during the movement process,the walking and running movements of the virtual human are transformed into the same time period through time transformation.Then selecting the appropriate fusion function to fuse the walking and running movements of the virtual person,which improves the virtual person from the starting point to the complex virtual environment.The realistic movement of the accident site.(2)The path planning of the virtual human based on the improved artificial potential field in the chemical accident simulation environment is studied.Aiming at the path planning problem of how the virtual human moves from the place of departure to the place of accident,first,In the traditional artificial potential field model,change the direction of repulsive force component and add a distance factor,Solve the problem of local minimum point and target unreachable in traditional artificial potential field.Secondly,according to the complexity of the virtual environment,the movement form of the virtual human is determined,which shortens the time from the departure of the virtual person to the place of the accident.Finally,an optimal path is selected through the path planning model,Eventually,the virtual human can automatically avoid obstacles from the point of departure to the place where the accident occurred and can automaticallyadjust the movement form according to the distribution of obstacles in the chemical accident simulation scene.(3)The virtual human interactive control for chemical accident simulation training is studied.Aiming at the lack of human interaction in the traditional chemical accident simulation training system,this article considers each virtual person's behavior node to deal with chemical accidents as an event,and builds a behavior tree according to the time and logic sequence of these events.Through the behavior tree,the cooperation of virtual humans is controlled,and chemical accidents are handled together,which improves the students' ability to deal with chemical accidents.(4)The virtual human technology is applied to the chemical accident simulation training system,and the system 's Scene model design,model-driven design,combined with specific applications to achieve The simulation training of chemical accidents improves the immersion of the system and increases the students' sense of operation.