依据特定工况下的振动激励频率设计得到的多维减振平台，不能满足多场所、多工况下减振的要求。通过改变弹簧刚度值调节减振平台的固有频率可实现其不同工况下多维减振的目标。给出了基于空间对称3-PRC并联机构设计的多维减振平台模型；采用闭环矢量方法建立其运动学、动力学理论模型；采用自适应遗传算法对满足特定要求固有频率的弹簧刚度值进行优化，得到了满足误差要求的弹簧刚度值，实现了多维减振平台的调频目标。为设计工作于变激励工况下的多维减振平台提供了一种新的思路。
Abstract
The multidimensional vibration isolation platform designed based on the specific vibration excitation frequency, can’t meet the requirement of vibration isolation for different working place or condition. In order to meet the need of the multidimensional vibration isolation with excitation varying frequently, adjusting the natural frequency by changing the springs has to become necessity. In this paper, the model of the multidimensional vibration platform based on spatial symmetry 3-PRC parallel mechanism was given. The kinematics and dynamics were established by the closed-loop vector method. The adaptive genetic algorithm was adopted to gain the springs stiffness value, satisfying the error requirements with the specific natural frequency, at the same time, the goal of adjusting the natural frequency was achieved, which providing a novel means to design a multidimensional vibration isolation platform working under varying excitation condition.
关键词
减振平台 /
调节频率 /
弹簧刚度 /
自适应遗传算法
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Key words
Vibration isolation /
platform /
Adjusting natural frequency /
Springs stiffness /
AGA
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