结构模态控制的“溢出”问题及控制策略

“Overflow”of Structural Model Control and Its Solving

结构模态控制是结构振动控制的重要技术． 通常利用控制前少数阶振型反应来达到结构振动控制的目的． 但如果处理不当，往往会产生控制溢出或观测溢出等问题． 文中从理论上讨论了结构模态控制的稳定性问题，证明了未控模态或剩余模态的失控将影响控制系统的性能而导致整个系统的振动不稳定． 同时，给出了可调参数ｒｉ 的取值范围，并对模态主动控制中存在的溢出问题提出几种解决的方法．

Structural model control is an important technique of structural vibration control.Usually,it attains the goal of structural vibration control by using a few pre harmonic response.However.its mishandling often brings about controlling overflow or observational overflow.Beginning with a theoretical discussion on stability of structural model control,the author demonstrates that uncontrolled mode or lose control of surplus mode will affect the performance of control system and thus will lead to vibration instability of entire system;and gives the codomain of adjustable parameter r 1;and proposes several methods for solving overflow existing in active control of structural mode.