CAJ | 학술논문

设计并实现了一种基于零长弹簧的超低频垂直隔振系统。利用零长弹簧倾斜悬挂摆杆，通过精细调节可实现固有周期为20 s的机械振荡。利用光电探测技术检测摆杆的微小位移，并对摆杆进行比例积分微分控制（Propor-tional-Integral-Derivative，PID），有效补偿温度变化及弹簧蠕变引起的系统漂移，提高系统的稳定性。深入分析控制参数对系统周期特性的影响，反馈控制的积分项（I项）可补偿系统漂移，反馈控制的比例项（P项）可调节系统的刚度，而微分项（D项）可用于控制系统的阻尼系数。通过设置合适的控制参数，可以将系统的固有周期调节至30 s以上。该系统理论上可以实现超低频垂直隔振，有望应用于高精度绝对重力测量等精密物理实验研究。
설계병실현료일충기우령장탄황적초저빈수직격진계통。이용령장탄황경사현괘파간，통과정세조절가실현고유주기위20 s적궤계진탕。이용광전탐측기술검측파간적미소위이，병대파간진행비례적분미분공제（Propor-tional-Integral-Derivative，PID），유효보상온도변화급탄황연변인기적계통표이，제고계통적은정성。심입분석공제삼수대계통주기특성적영향，반궤공제적적분항（I항）가보상계통표이，반궤공제적비례항（P항）가조절계통적강도，이미분항（D항）가용우공제계통적조니계수。통과설치합괄적공제삼수，가이장계통적고유주기조절지30 s이상。해계통이론상가이실현초저빈수직격진，유망응용우고정도절대중력측량등정밀물리실험연구。
An ultra-low frequency vertical vibration isolation system based on the zero-length spring technology was designed and realized.In the system,a horizontal beam was supported by a zero-length spring,oscillating with a natural period of 20 s.The movement of the beam was detected by an optical detector and a Proportional-Integral-Derivative control module (PID ) was applied to compensate the system drift due to temperature change and spring creep.In addition,the impact of control parameters on the oscillation period was analyzed.The integral control is necessary to compensate the system drift,and the proportional control is applied for adjusting the system elasticity.Additionally,the derivative control contributes to the system damping.By setting the control parameters appropriately,the oscillation period can be adjusted to more than 30 s.This vertical vibration isolation system is important in precision measurement applications such as the ultra-high precision absolute gravimetry.