Research On The Automobile Cab Ergonomic Design Based On Biomechanics

With the vigorous development of automobile industry, the driving comfort is increasingly attracted more and more attention. Because of the higher driving degrees, the unreasonable design of automobile cab will cause drivers tend to uncomfortable driving postures, which will easily lead to drivers' discomfort and fatigue. Moreover, the bad condition may reduce the controlling of automobile, which affects driving safety. Therefore, the health and safety issues caused by cabs' design factors have become the research focus among the automobile makers and scholars.Cab design is an important part of the automobile development. Drivers' driving comfort and riding comfort are directly determined by cab design. In the concept phase of new car development, we can quantitatively estimate drivers' comfort through ergonomics simulation technology. In this way, we can put up with reasonable cab design project in prophase of automobile arrangement design, and provide guidance advice for detailed design phase.The present paper researched the relationship between the design parameters of man-machine interface and muscle fatigue from the perspective of biomechanics. Combined the traditional ergonomic design method and biomechanical method, t hen designed study parameters of operation devices and analyzed them in biomechanical software. T hrough simulation experiment to study the effect of parameters on the driver's maximum muscle activity. Finally, optimized the study parameters, so as to realize the optimal match among operation interfaces of cab under the condition of certain driving environment. In addition, this paper established the driving comfort model based on biomechanics. We can evaluate drivers' static driving postures by the driver's joint angle range, and evaluate dynamic driving position s by muscle activity as well. T herefore, the process of verification in seating buck can be canceled, in order to avoid repeated design changes, reduce the development cost and shorten the development cycle. T his method built the correlations between cab engineering design and driver's operating comfort and provided a basis for ergonomic parameter s design of automobile cab.In order to realize the simulation analysis on driving operation based on biomechanics, this dissertation proposed a virtual human biomechanical model which is composed of geometric model, motion model, external force dynamic model and muscle force model. Meanwhile, for the purpose of ergonomic simulation analysis and evaluation, we also discussed the theory on virtual human modeling and related algorithms.Combined with the SAE standards, we researched the key parameters for cab arragement based on ergonomics. Moreover, developed human model(stand for the driver) and environment model(stand for automobile cab), and coupled the two model. According to the driving comfort model, taking the pedals design for example, we put up with a method on the automobile cab ergonomic design based on biomechanics. This method relies on biomechanical analysis and computer aided technology, considering drivers' muscle fatigue in the process of automobile design. In this way, we can guarantee good operating comfort and reduce unreasonable ergonomic engineering design as well.