活塞连杆机构的外文和翻译.doc

Modeling and Simulation of the Dynamics of Crankshaft- Connecting Rod-Piston-Cylinder Mechanism and a Universal Joint Using The Bond Graph Approach Abstract This paper deals with modeling and simulation of the dynamics of two commonly used mechanisms, (1) the Crankshaft – Connecting rod – Piston – Cylinder system,and (2)the Universal Joint system, using the Bond Graph Approach. This alternative method of for mulation of system dynamics, using Bond Graphs, offers a rich set of features that include, pictorial representation of the dynamics of translation and rotation for each link of the mechanism in the inertial frame, representation and handling of constraints at joints, depiction of causality,obtaining dynamic reaction forces and moments at various locations in the mechanism, algorithmic derivation of system equations in the first order state-space or cause and effect form, coding for simulation directly from the Bond Graph without deriving system equations,and so on. Keywords: Bond Graph, Modeling, Simulation, Mechanisms. 1 Modeling Dynamics of two commonly used mechanisms, (1) the Crankshaft – Connecting rod – Piston – Cylinder system,and (2) the Universal Joint system, are modeled and simulated using the Bond Graph Approach. This alternative method of formulation of system dynamics, using Bond Graphs, offers a rich set of features [1, 2]. These include, pictorial representation of the dynamics of translation and rotation for each link of the mechanism in the inertial frame, depiction of cause and effect relationship,representation and handling of constraints at joints, obtaining the dynamic reaction forces and moments at various locations in the mechanism, derivation of system equations in the first order state-space or cause and effect form, coding for simulation directly from the Bond Graph without deriving system equations.Usually the links of mechanisms are modeled as rigid bodies. In this work, we develop and apply a multibond graph model representing