CAJ | 학술논문

为了改善精密平台的工作性能，减小台体在宽频环境激励作用下的动力响应，设计了一种基于磁流变阻尼器的混合隔减振系统。首先建立了该隔减振系统的7自由度动力学仿真模型，动力学分析结果表明，该隔减振系统可以在较宽的频域范围控制台体的动力响应。然后，在分析隔减振系统各参数对隔减振效果的灵敏度基础上，采用遗传算法优化其中灵敏度较大的参数，使得该隔减振系统可以达到既定的控制指标。优化分析结果表明，优化后的混合隔减振系统不仅将台体的位移响应控制在限制条件范围内，还能有效减小台体的加速度响应。当频域大于50 Hz时，台体加速度响应控制效果明显；当频率小于50 Hz时，控制效果稍差。
위료개선정밀평태적공작성능，감소태체재관빈배경격려작용하적동력향응，설계료일충기우자류변조니기적혼합격감진계통。수선건립료해격감진계통적7자유도동역학방진모형，동역학분석결과표명，해격감진계통가이재교관적빈역범위공제태체적동력향응。연후，재분석격감진계통각삼수대격감진효과적령민도기출상，채용유전산법우화기중령민도교대적삼수，사득해격감진계통가이체도기정적공제지표。우화분석결과표명，우화후적혼합격감진계통불부장태체적위이향응공제재한제조건범위내，환능유효감소태체적가속도향응。당빈역대우50 Hz시，태체가속도향응공제효과명현；당빈솔소우50 Hz시，공제효과초차。
A hybrid isolation system based on the magnetorheological damper (MRD)is proposed to improve the performance of the precision platform and reduce the dynamic response under broadband environment excitation.First,the simulation model of 7 degrees of freedom for this system is adopt-ed.The results of dynamic analysis show that the isolation system can control the dynamic response of the platform in a wide range of frequency domain.After analyzing the sensitivities of the system parameters on the effect of vibration isolation,the genetic algorithm is adopted to optimize the sensi-tive system parameters to achieve the expected goal.The results show that the optimized hybrid iso-lation system can not only control the displacement response within the corresponding restrictions,but also reduce the acceleration response of the platform effectively.When the frequency is more than 50 Hz,the control effect of the acceleration response is obvious;otherwise,the control is less effective.