HE Shengxin, ZHU Jianqing, ZHANG Yi. Noether quasi-symmetry for non-conservative systems based on fractional model[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2016,55(2):58-63.
HE Shengxin, ZHU Jianqing, ZHANG Yi. Noether quasi-symmetry for non-conservative systems based on fractional model[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2016,55(2):58-63. DOI: 10.13471/j.cnki.acta.snus.2016.02.011.
The Noether symmetries and conserved quantities for non-conservative systems are proposed and studied with fractional model. Based on the Hamilton principle for the non-conservative systems
the fractional differential equations of motion are derived. With using the invariance of the fractional Hamilton action under the infinitesimal transformations of group which depends on the time
the generalized coordinates and velocities
the definition and the criterion of the fractional Noether generalized quasi-symmetry for the non-conservative systems are given. The relation between the fractional Noether quasi-symmetry and the conserved quantity is established
and the fractional conserved quantities are obtained. The special cases
which the generalized nonpotential forces do not exit or the gauge function is equal to zero
are discussed. At the end
two examples are given to illustrate the application of the results.