考虑一个航天控制实验室模型振动的边界反馈镇定问题。证明了具有变量系数的复合系统在边界控制作用下构成的闭环系统是一个Riesz系统,即系统存在一列广义特征函数构成状态空间的Riesz基。从而系统的谱决定的增长条件,指数稳定性成立。并给出了特征值的渐近展开式。
A model of the spacecraft control laboratory experiment (SCOLE) with variable coefficients is considered. It is shown that the closed-loop system under shear force boundary control of the form u (t) = kyxxxt( 1, t) has a sequence of generalized eigen-functions, which form a Riesz basis for the state Hilbert space. Therefore, the spectrum -determined obtained. condition holds. The exponential stability and an asymptotic expansion of spectrum are obtained.