APPLICATION OF REGULAR ROTATIONAL AND TRANSLATIONAL CONSTRUCTS TO VEHICLE DYNAMICS PROBLEMS

摘要

The paper discusses the representation of a vehicle as a mechanical system including rotational, translational, rotational-translational dynamic constructs and coupling devices for the inertial parts of constructs. The proposed system of regular constructs allows the detailed vehicle schematization to solve various problems of dynamics within the chain "Mechanical Object (System) – Mechanical Model – Regular Dynamic Scheme – Mathematical Model". Particular attention is given to the regular dynamic schemes formed from regular constructs, which formalize the different devices having the same mathematical models. The corresponding mathematical models cover: 1) Algebraic equations to find the torques acting on the rigid components of a mechanical model, 2) Differential equations describing the dynamics of subsystems, which contain inertial, elastic (deformational) and dissipative parts, 3) Logical equations describing the states of clutches and brakes as well as the driving wheels/road interaction. In the method under consideration the dynamic equations are auto-created via the dynamic schemas. The proposed method is especially useful for vehicles on early design stages and by the conceptual analysis when the general structure of an object is defined but there is no detailed information about the units design.