Application Of VR In Ergonomics Analysis Of Roadheader

From the overall trend of China’s energy development,coal mining machinery has been a high-speed trend.As a key equipment to achieve high yield,high efficiency,safe mechanization in the coal production,demand for roadheader is increasing year by year.But the particularity of downhole working conditions,operation risk high and oil consumption make the research in ergonomics is relatively less.Even if there are some people do the research about it,because of the bad environment,dangerous factors and the experimental data difficult to collect,result in research difficulties in this area.In recent years virtual simulation has attracted extensive attention due to its great advantages,whose application range has been extended from the initial entertainment in the game industry to the virtual simulation and control of industrial equipment.With virtual simulation,we may organically integrate data,such as people,machine,environment,to reasonably combine human,machine and environment in the experiment,reach the coordination and unity in the human function,physiology,psychology and machine,environment and make the virtual simulation safely and effectively work with hi-tech.Virtual simulation is an excellent scheme to link the research of coal mine machinery and ergonomics.This paper takes the ergonomics analysis of boom-type roadheader as the research target and boom-type roadheader as object of study with the guide of ergonomics theory,uses 3d modeling technology to constructe virtual prototype of roadheader with the help of Unity3D virtual reality system development platform to achieve the control simulation of roadheader and simulate its structure and movement process.The experimental data which the operator wears a helmet to collect verify the validity and feasibility in ergonomics analysis,and provide theoretical basis for the study of ergonomics roadheader.Firstly,this paper analyzes the kinematic state and mechanical structure of EBZ230 roadheader,based on the particularity of using environment of roadheader considering the actual situation.Considering from the working environment of the roadheader driver interface and hand extension,instrument display of the control device and controller design,we use solidworks to establish the basic model of each part,and optimize the model to build the roadheader prototype througth Maya.Secondly,with the help of Unity3D virtual reality platform,an interactive cantilever roadheader operation scene and process simulation environment are constructed.We use the platform providing physics engine and c#language to carry on the dynamic programming,complete machine parts(the rotation of the cutting head and lifting movement,the rise and fall of crawler walking motion,shovel board movement)of the motion simulation.Based on the SDK of the data helmet,Allow the operator to operate in a virtual simulation environment by wearing a VR helmet to obtain a real control experience,and make the simulation system from the aspects of control comfort,controller fluency,virtual model,control space design,environmental effects and simulation platform,etc.Theoretical judgment.Finally,DELMIA software and fuzzy synthetic evaluation method.are used to evaluate the effectiveness and feasibility of virtual simulation technology in the study of ergonomics in roadheader.The experiment shows that the system runs stably,the control effect is real and smooth,reaching the requirements of safety and comfort of the operator.The research and development of this system not only overcomes the constraints of time and space in the real machine research,but also has important significance for the study of ergonomics in the roadheader,and provides a new idea for the study of ergonomics of coal mine machinery and other special equipment.