Design Of Large Mining Excavator Cab Based On TOPSIS

Large mining excavator is an important equipment for mineral mining.The operating environment is complex.There are serious dust concentration and high noise.The operators operate in such a complex environment to carry out the operation of a huge project.Therefore,improving comfort of the cab is crucial.At present,the comfort of large mining excavator cab has been studied abroad and applied in production.However,domestic large mining excavator manufacturers mainly focused on the study of mechanical properties,and the study on the comfort of the cab was not in-depth enough.Actually,during the production,the main composition of the cab was to assemble the existing products.The structure size,layout and other aspects of the cab did not meet the needs of Chinese drivers.Therefore,the cab design needs to combine the basic knowledge of ergonomics to design a cab that meets the needs of Chinese drivers.From the perspective of ergonomics,this paper takes TOPSIS as the basic method to design the interface layout and appearance of the cab.In order to optimize the man-machine performance of the cab and improve the efficiency and safety of the driver by improving the comfort performance.On the basis of the preliminary investigation,the internal layout and components of a certain type of large mining excavator were analyzed,and the specific situation of the functional components was emphatically introduced.The contents were summarized by integrating TOPSIS method,vehicle ergonomics theory,vehicle human-machine interface and body modeling theory.The overall framework of this paper was mainly divided into two parts:cab interior design and cab exterior design.The design of the central console was emphasized in the cab.The independent console was improved into a semi-circular central console to facilitate the operation of the driver.For the perspective of the layout of components,the weight value of each component was obtained based on the use frequency of components by improved TOPSIS.And the priority order of operating components in the cab was sorted.By comprehensively analyzing the ranking result and the driver's experience,the logical relationship between the operating elements was analyzed.And the layout of the operating platformwas designed according to the importance ranking and operating logic.Through the basic knowledge of ergonomics,improve the design of handrail.Finally,RAMSIS simulation analysis was used to verify the hand reach ability and comfort of the improved central console.According to the modeling design principle and the opinion of the heavy engineer,four models of the excavator cab modeling were designed.The armrest and seat inside the cab were improved.During the process of evaluation and selection scheme of four modelling,based on the investigation and analysis of evaluation index selection,the index weights which unified the opinions of experts was calculated by improved AHP.Finally,the four schemes were evaluated by the fuzzy TOPSIS.Additional,the optimal solution was chose through the ranking results of alternative.Finally,sensitivity analysis experiment was carried out to verify the evaluation results.The result shows that the Modeling evaluation method is correct.The paper solved the problem of unreasonable layout of the cab.It provids a layout plan of operator's cab based on weight analysis and operation logic,and reasonably improves the modeling layout of operator's cab.The paper solved the problem of monotonous cab appearance.It probes into a variety of design schemes and provides a method for selecting and evaluating the modeling schemes.It provides a theoretical basis for the follow-up research on cab of large mining excavator.