Research And Simulation On Dynamic Path Planning For Deck Operators Based On Behavioral Decomposition Algorithm

The smooth progress of all operations on aircraft carriers depends on mutual assistance of deck operators.Reasonable operation planning can increases the aircraft sorties generation rate(SGR)and affects the combat capability of aircraft carrier.In the virtual environment,it has become a trend to simulate real events,through simulation methods to study virtual human movement path and operation actions How to use path planning technology in a virtual environment to ensure that virtual human safely avoid obstacles in a complex environment and to reach destinations smoothly and efficiently has become a research hotspot.In the simulation process of aircraft SGR,the virtual human may encounters aircraft,tractors,and other virtual humans while walking,in order to represent the movements and related actions of virtual humans actually,behavior-based virtualization is used.In the 3D scene of the aircraft SGR simulatio0 n system,DI-Guy is used to add different walking movements of virtual personnel on decks and to complete the actions of different operations,so as to visualize the human actions of the simulation process.(1)The path planning simulation system structure of virtual human is developed and designed.The system includes nine modules such as communication module,basic behavior library,behavior decision module,environmental information module,monitoring module,behavior planning controller,virtual human job simulation module,2D and 3D display module.(2)Design of virtual human path planning basic behavior.Create an environmental model and model different types of moving objects such as decks,equipment,resources,and carrier aircraft.On the basis of the environmental model,the identification of different types of obstacles is performed to complete the mapping of the virtual human movement behavior.The behavior of virtual human is divided into dynamic virtual human obstacle avoidance behavior and active obstacle avoidance of static virtual human.According to the results of the behavioral mapping,different response patterns are designed to avoid obstacles.(3)Virtual human behavior fusion.In order to allow the virtual human to simultaneously consider the obstacle avoidance and the movement target point during movement,a method of integrating the obstacle avoidance behavior and the goal behavior is designed.Priority is set for different behaviors,emergency behavior and active obstacle avoidance of static virtual human have the highest priority,and obstacles are quickly avoided.In other cases,a fuzzy logic control algorithm is used to set up a behavioral fusion controller for virtual human.Combine three obstacle avoidance behaviors and move_to_goal behavior.Consider avoiding obstacles and reaching the target point as quickly as possible.(4)Use software of DI-Guy to construct virtual human behavior,and then use Vega to import 3D virtual human into the scene.Add a series of walking and homework actions to the virtual human and real-time updates the position.As a result,realize the 3D virtual movement and work process of deck operators.For the specific actions during the simulation,use the software of DI-Guy Motion Editor to design actions.(5)The feasibility of the path planning method was verified in the simulation system of aircraft SGR.Compared the behavior decomposition method with the artificial potential field method on path planning simulation results.And the result proves that the behavior decomposition method is more ideal.