Multi-body System Dynamics Model Research Articles

On the Adaptive Control of Railway Tilting Coaches

This paper present an adaptive control scheme for railway tilting coaches based on a new nonlinear multibody system dynamics model. Making use of the fundamental properties of the tilting coaches, an adaptive algorithm is developed, which consists of a PD feedback part and a full dynamics feedforward compensation part with the uncertain parameters being estimated online. A computer simulation study is conducted to evaluate the performance of it. The result shows that the riding comfort of coaches is improved effectively.

The heat of adsorption of a boundary lubricant : E. P. Kingsbury. ASLE Trans., 3 (1) (1960) 30–33; 6 figs., 1 table, 4 refs.

In this paper, a new tribodynamic model for the translational joints with clearance is proposed by coupling the mixed lubrication model and the rigid-flexible multibody system dynamic model. The lubrication behavior is described by the average Reynolds equation and the Greenwood-Tripp asperity contact theory. Under a unified framework of the absolute nodal coordinate formulation (ANCF), motion equations of the rigid-flexible multibody system are established. The assembled equations of tribodynamic model are solved by a stable and effective algorithm. An application example of a two-stroke marine diesel engine is then used to study the tribological and dynamic behaviors of the crosshead-guide translational joint with clearance. The results show that considering the elastic deformation of components will lead to more intense secondary motion and smaller local clearance, resulting in an oil film pressure distribution with great difference from the rigid body modeling.