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提出极点偏置ＰＤＬ准则对振动控制中压电传感／驱动器的位置进行评估．ＰＤＬ准则综合了各阶模态所对应的极点向左偏离虚轴的距离，不仅考虑了各阶模态的阻尼比，确切表达了减振效果，同时判定了稳定性．数值分析表明，ＰＤＬ准则能反映压电元件的位置、数量和尺寸，以及反馈增益、模态截取等一系列因素对主动控制的影响，是较为理想的评估压电元件位置的方法．
A pole-offset PDL criterion is proposed to evaluate the position of the piezoelectric sensor / actuator in vibration control. The PDL criterion synthesizes the distance from the imaginary axis to the left of the pole corresponding to each mode, which not only considers the damping ratio of each mode, but also expresses the damping effect exactly and at the same time, the stability is judged. Numerical analysis shows that the PDL criterion can reflect the influence of a series of factors such as the position, the number and the size of the piezoelectric element, the feedback gain and the modal interception on the active control, which is an ideal method to evaluate the position of the piezoelectric element.