The precision equipment bears the vibration excited by the road roughness during transportation, and faces the risk of damage arising from the vibration. The parallel air spring vibration isolation system (PAVS) has an excellent vibration isolation performance, so has a good application prospect in the precision equipment transportation. But under the conditions of abnormal road and eccentric load, PAVS bears great vibration excitation, and the resulting large deformation of air spring makes the air spring stiffness nonlinear, so to obtain an excellent vibration isolation performance faces a great challenge. Aiming at this problem, based on the measured parameters, the nonlinear dynamics model of PAVS is proposed. Then, the influence of air spring under large deformation on the vibration isolation characteristics is discussed. Finally, under the condition of eccentricity of precision equipment, the vibration isolation characteristics of PAVS with equal height control strategy is investigated. The results show that PAVS with the equal height control strategy has good vibration isolation characteristics. So for the transportation of large precision equipment, PAVS is a potentially useful method.

精密设备在运输过程中会承受路面不平所激发的振动，并面临因振动而损坏的风险。并联空气弹簧隔振系统（PAVS）具有优异的隔振性能，因此在精密设备运输中具有良好的应用前景。但是，在异常道路和偏心载荷的条件下，PAVS承受着很大的振动激励，空气弹簧产生的大变形使空气弹簧的刚度呈非线性，因此要获得优良的隔振性能面临着巨大的挑战。针对该问题，基于实测参数，提出了PAVS的非线性动力学模型。然后，讨论了大变形情况下空气弹簧对隔振特性的影响。最后，在精密设备偏心条件下，研究了等高控制策略下PAVS的隔振特性。结果表明，采用等高控制策略的PAVS具有良好的隔振性能。因此，对于大型精密设备的运输，PAVS是一种潜在有用的方法。