Non-linear and non-conservative quasi-variational principle of flexible body dynamics and application in spacecraft dynamics

The law of conservation of energy is one of the most fundamental laws of nature. According to the law of the conservation of energy, the non-linear and non-conservative quasi-variational principle of flexible body dynamics is established. The physical meaning of the quasi-stationary value conditions has been explained in non-linear and non-conservative flexible body dynamics. In the case study, the application in spacecraft dynamics is researched.