Based on the total time derivative along the trajectory of the time, we study the unified symmetry of Vacco dynamical systems. The definition and the criterion of the unified symmetry for the system are given. Three k...
In this paper the Lie symmetry and conserved quantities for nonholonomic Vacco dynamical systems are studied. The determining equation of the Lie symmetry for the system is given. The general Hojman conserved quantity...
The Chetaev model and Vacco model in nonholonomic system are studied. The equivalence of the Chetaev model and Vacco model in ideal nonholonomic system and nonideal nonholonomic system realized actively is testified. ...