Abstract: Experiment system is essential to the investigation of force isolation, which is much different from the exciter for displacement isolation upon mechanism and transducer setting. A rig and corresponding measuring system is developed to ful-fill the requirements of the force isolation of single layer or double-layer system. First, framework based on synchronized dual rotational vibrators is designed and made. Secondly, the exciting force of the exciter is deduced. Thirdly, measuring method, PC based software and hardware for force transmissi-bility is presented. Finally, force transmissibility of the double- layer and double-layer systems of no damping, light damping and heavy damping provided by Lord Company produced MR damper RD-1005-3 is measured independently. The results show that the experimental damping free transmissibility matches well the theoretical one; however, the experimental transmissibility of light damping and heavy damping differs much from the theoretical one because of the strong nonlinear-ity of the MR damper.

Key words: Double-layer force isolation, Force isolation, Magneto-rheological, Single layer force isolation, Transmissibility