Passive control is the most popular methodology for flexible spacecraft while it remains an open problem whether the closed-loop performance can be achieved only with passive control subject to the coupling modes of rigid and flexibility. Also, the closed-loop performance of passive PD control based on the dynamics of the Euler angle parameterization of spacecraft, which has been widely used in practice, is yet to be addressed. Towards these challenges, by introducing the input-output exact linearization theory and Lyapunov theory, the authors show that the closed-loop performance for flexible spacecraft with rigid and flexible modes can be achieved by adjusting the parameters of the passive controllers sufficiently large. This is done by firstly transforming the flexible spacecraft dynamics into an exact feedback linearization standard form, and then analyzing the closed-loop performance of flexible spacecraft.

无源控制是挠性航天器最流行的方法，而闭环性能是否只能通过受刚性和挠性耦合模式约束的无源控制才能实现仍然是一个悬而未决的问题。此外，基于飞船欧拉角参数化动力学的无源PD控制的闭环性能在实践中已得到广泛应用，但尚待解决。针对这些挑战，作者通过引入输入-输出精确线性化理论和Lyapunov理论，表明通过将无源控制器的参数调整得足够大，可以实现具有刚性和柔性模式的挠性航天器的闭环性能。首先，将挠性航天器动力学转换成精确的反馈线性化标准形式，