A magnetorheological vibration isolation platform (MRVIP) with cubic structure Stewart mechanism was designed and an effective semiactive control strategy was proposed based on its inverse kinematics characteristics for the helicopter to effectively reduce the vibration of the helicopter rotor transmitted from the main reducer to the fuselage. Firstly, the structural scheme of the helicopter main reducer MRVIP was proposed. Secondly, the MR damper was manufactured, and the dynamic model was established based on the mechanical test. Thirdly, according to the design requirements of the VIP, the overall structure of the MRVIP was designed. Fourthly, the dynamic simulation model of the MRVIP was established by using 3D drawing software and SimMechanics software. And the vibration characteristics of each direction were analyzed. Finally, a PID-Fuzzy semiactive controller was designed based on the characteristics of the MR damper to improve the performance of the MRVIP. The numerical analysis results showed that compared with the passive MRVIP and the MRVIP based on fuzzy control, the MRVIP with PID-Fuzzy control has the best vibration isolation performance and can effectively reduce the vibration of 6-DOF.

设计了立方结构斯图尔特机构的磁流变隔振平台（MRVIP），并基于其逆运动学特性提出了一种有效的半主动控制策略，以有效降低直升机从主减速器传递至机身的振动。首先，提出了直升机主减速器MRVIP的结构方案。其次，制造了MR阻尼器，并基于力学测试建立了动力学模型。第三，根据VIP的设计要求，设计了MRVIP的总体结构。第四，利用3D绘图软件和SimMechanics软件建立了MRVIP的动态仿真模型。并分析了各个方向的振动特性。最后，根据MR阻尼器的特性设计了PID模糊半主动控制器，以提高MRVIP的性能。数值分析结果表明，与被动式MRVIP和基于模糊控制的MRVIP相比，带有PID-Fuzzy控制的MRVIP具有最佳的隔振性能，可有效降低6-DOF的振动。