The paper achieved the 3D parameterized model of the drum with VB programming in Solid Works CAD software environment, and completed the finite element stress and strain analysis for the drum structure with ANSYS finite element analysis software. The force and deformation of the driving drum was basically mastered. A full process from 3D parameterized model to structural analysis for the drum was implemented in this paper. It highly improved the drum design level and efficiency.
For the contour accuracy of direct drive X-Y servo system is susceptible to changes of the load parameters and nonlinear disturbances including the friction , A quadratic optimal position controller with sliding contour tracking controller based on equivalent errors model is proposed to improve contour tracking performance and the robustness. The position controller is designed by the factorization of quadratic optimization on frequency domain. Based on Equivalent Errors model including the equivalent contour error and tangential error, the contour tracking problem is converted to the stabilization of error dynamic system. Simulation and experimental results show that the effects of nonlinear disturbances are reduced effectively and the designed controller has high contour tracking accuracy and strong robustness.
Valve train has important impact on engine’s performance and useful life. With the development of engine technology, the failure about valve train get attention gradually. Valve spring of engine is the important components in the valve assembly. In order to ensure valve and cam work reliably in poor condition, the dynamic failure analysis on them have great theoretical and engineering applied significance. So the dynamic performance and reliability of the valve train should also be concerned. The new software is a high-performance language for technical computing. It integrates computation, visualization, and programming in an easy-to-use environment where problems and solutions are expressed in familiar mathematical notation.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.