Research On Analysis And Evaluation Technology Of Ergonomics Based On Virtual Test

In recent years,in the face of the huge demand of the aviation market,it has been higher requirements in the field of aviation product maintenance design.At the same time,the occupational safety and risk issues of aircraft crews have become increasingly important.Among them,the flight crew has stricter requirements for the disassembly,repair,and maintenance of complex aviation equipment.Long-term high-intensity work by the crew may cause work-related musculoskeletal disorders(WMSD).To reduce the maintenance risk of the crew,aviation products need to be improved Repairability.Through immersive virtual maintenance,with the help of virtual electronic prototypes,it is free from the constraints of physical prototypes,which provides a good verification environment for design departments,and also greatly saves the cost of physical maintenance prototypes,and accurately evaluates the bone risk in the maintenance tasks of maintenance personnel.The results of the risk assessment are fed back to the design department and suggestions for modifications are made to improve the maintainability of the product.This article mainly builds a virtual maintenance scenario and develops an aviation maintenance risk assessment system to implement virtual maintenance verification.The key technical issue is the development of an aviation maintenance risk assessment system.Input motion data through motion capture equipment,import motion data in Mvnx format into independent research and development of Rapid Upper Limb Assessment(RULA)and Rapid Entire Body Assessment(REBA)systems for numerical analysis.After the optimization of the system algorithm,it is possible to realize automatic value-added judgment,risk assessment based on time series,and assessment of both sides of the body at the same time,and obtain important information such as the average risk assessment value of aviation maintenance tasks,the trend of task risks,and the proportion of risks at various levels.The system evaluates the real maintenance task by comparing with the static evaluation results of JACK and comparing the subjective feelings of maintenance personnel,which verifies the feasibility and reliability of the independent research and development system.In addition,it analyzes the errors in the experiment,through effective methods toreduce the errors,and increase the accuracy of the overall research content.Finally,through the case of the virtual verification of the aero engine digital prototype,it can be seen that the virtual repair verification is efficient and intuitive.The verification results provide important reference information for the maintainability design of large equipment.In the initial stage of the design,the maintainability and practicability of the designed equipment are checked.If any unreasonable part is found during the troubleshooting process,it can be directly fed back to the design department for modification,which avoids re-collection and modification after the product is issued.