中文摘要：

我们调查了二阶段的颤动隔离的一个活跃控制系统的行为，致动器与上面的被动的山或更低的被动隔离山同时安装了。我们由为致动器学习二阶段的活跃颤动隔离的动力学在揭示了在致动器的活跃控制力量和被动隔离乾的参数之间的关系前述二个位置接着。与在上面的山旁边安装的致动器，当刺激力量的频率比上面的山的自然频率大得多时，小活跃力量能完成很好的孤立效果；更大的活跃力量在低频率的领域被要求；并且当上面的山在回声区域以内工作时，活跃力量等于刺激力量，建议一条途径到减少摇摆并且由增加上面山的僵硬的保证理想的安装精确性。在也低或离开回声区域远的高频率区域，当致动器比在上面的山旁边在更低的山旁边时，活跃力量更小。

英文摘要：

We investigated the behaviors of an active control system of two-stage vibration isolation with the actuator installed in parallel with either the upper passive mount or the lower passive isolation mount. We revealed the relationships between the active control force of the actuator and the parameters of the passive isolators by studying the dynamics of two-stage active vibration isolation for the actuator at the foregoing two positions in turn. With the actuator installed beside the upper mount, a small active force can achieve a very good isolating effect when the frequency of the stimulating force is much larger than the natural frequency of the upper mount; a larger active force is required in the low-frequency domain; and the active force equals the stimulating force when the upper mount works within the resonance region, suggesting an approach to reducing wobble and ensuring desirable installation accuracy by increasing the upper-mount stiffness. In either the low or the high frequency region far away from the resonance region, the active force is smaller when the actuator is beside the lower mount than beside the upper mount.