Research On Double Railway Suspended Vehicle For Automated Transportation

Railway Automated Vehicle is a kind of efficient suspended transportation machine which has been widely applied in the automobile industry. Railway Automated transportation requires steady and reliable dynamic performance. Double Suspended Vehicle for Automated Transportation, which was not developed in China short time before, has been widely used in the overseas. We could only design and manufacture Single Suspended Vehicle for Automated Transportation at present. The design and research of the traditional suspended vehicle system only includes its structure and stability. The theory results are validated only through a lot of physical tests, which leads to increase investigative cost and defer the course of industrialization. In order to design the first Double Suspended Vehicle for Automated Transportation, we used the method of computer simulation in stead of the traditional experience design. With the advent of digital virtual prototype based on multi-body theory and its widely usage in the every walk of life, simulation model provides an effectual method for the quick design, analysis and optimization of the Double Suspended Vehicle for Automated Transportation. The modeling and simulation of dynamics provide a quick and reliable technique for the design and amelioration of the Double Suspended Vehicle for Automated Transportation System. The manufacturing cost of the equipment has greatly decreased.Based on the multi-body dynamic theory, the 1DOF, 2DOF and 6DOFdynamic equations of the Double Suspended Vehicle for Automated Transportation System are established in order to obtain the stability of the Double Suspended Vehicle for Automated Transportation. Numerical analysis of contact-impact is one of the most complex problems in dynamic simulation. The modeling of contact-impact has an impact on the simulation efficiency. This paper has discussed how to solve the contact-impact problems in multi-body systems.In ADAMS, a nonlinear spring damping contact model is applied to imitate the contact-impact force. The expression is below:So the tangential friction can be calculated as:The formula mentioned above is not suitable for the simulation of the Double Suspended Vehicle for Automated Transportation System, because the friction in this equipment prefers some kind of persistent contact to impact contact. Therefore, Binomial Friction Law is applied to calculating friction force along tangent. This method has involved adherence and impact. So it is easy to parameterize the friction by change the material or rough coefficient of the contact surface. The friction force expression based on Binomial Friction Law is illustrated below:The simulation model is established through Matlab/Simulink. The dynamic characteristics of the Double Suspended Vehicle for Automated Transportation System are obtained by the simulation for dynamics of the Double Suspended Vehicle for Automated Transportation. The running rule of the Double Suspended Vehicle for Automated Transportation could be obtained by analyzing its dynamics characteristics.In the view of the relentlessly changing of automobile paint line and new-style automobile paint lines endlessly emerging, the research of the dynamics characteristics of virtual prototype that approximates the physical prototype is very urgent. In order to adapt to this new trend, the modern virtual prototype technique based on the multi-body dynamics theory is imported to the analyzing of the modeling and dynamics characteristics of the Double Suspended Vehicle for Automated Transportation System triumphantly. Based on virtual prototype and modern design theory, the dynamics characteristics of the multi-body Double Suspended Vehicle for Automated Transportation System are analyzed and researched innovatively together with ADAMS simulation technique. The results of simulation are compared with the mathematic model founded by Matlab/Simulink. The veracity of dynamics equations of the Double Suspended Vehicle for Automated Transportation is validated. Through the design of experiment, sensitivity and design research are analyzed during the running of the Double Suspended Vehicle for Automated Transportation in order to get the optimal design parameters. This method provides credible foundation for the latter engineering design.Based on the finite element theory, the finite element non-linear contact model is established between the bearing wheel and railway of the Double Suspended Vehicle for Automated Transportation. The non-linear contact between bearing vehicle and railway is discussed while the bearing wheels endure the maximal load and are swerving. The bearing vehicle is optimized according to the results of FEM.To the last, the whole design scheme is analyzed for the Double Suspended Vehicle for Automated Transportation System. The structure and working principle are discussed with regard to the Double Suspended Vehicle for Automated Transportation. The design parameters are optimized according to the dynamics characteristics of virtual prototype. The field drawings are obtained by successfully applying the design parameters in the practical engineering project.