结果表明，在换能器不同振动模态下，等效并联电容电阻并非恒定值，而且实际支承工况下换能器系统工作时存在负阻尼效应。
The result shows, under different vibration mode, equivalent parallel capacitance and resistance are not constant value. There is negative damp effect in transducer system at the operating mode.
针对机械振动系统混沌运动的自身特点，提出了一种等效无源的混沌控制策略。
Aiming at the characters of nonlinearity chaos of mechanical vibration systems, a kind of strategy on passive equivalence controlling chaos is put forward.
对结构纯扭转的振动问题进行研究，分析了控制系统各参数对控制后结构等效阻尼比的影响。
The influence of systematic parameters on the structural equivalent damping ratio is analyzed for purely torsional vibration.
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