基于LMI的非线性摄动系统鲁棒绝对稳定性判据

讨论了前馈通道同时存在对象和控制器的范数摄动 ,而反馈通道存在扇区非线性的摄动系统的稳定性问题 .基于H∞ 理论和LMI方法 ,得到了一组由线性矩阵不等式表达的充分性条件 。

Exact Invariants and Adiabatic Invariants of Raitzin＇s Canonical Equations of Motion for Nonholonomic System of Non-Chetaev＇s Type

The exact invariants and the adiabatic invariants of Raitzin's canonical equations of motion for the nonholonomic system of non-Chetaev's type are studied. The relations between the invariants and the symmetries of the system are established. Based on the concept of higher order adiabatic invariant of mechanical system with the action of a small perturbation, the form of the exact invariants and adiabatic invariants and the conditions for their existence are proved. Finally, the inverse problem of the perturbation to symmetries of the system is studied and an example is also given to illustrate the application of the results.