In this paper, a kind of 6-degree of freedom parallel earthquake simulator is proposed, which has 28 -input, two types of the branches and the redundant and fault-tolerant actuators. Based on the theory of the parallel mechanism, the mechanism of the 6-degree of freedom parallel earthquake simulator with 28 -input and the redundant and fault-tolerant actuators is constructed. The kinematic model of the earthquake simulator is established by D-H method. The kinematic simulation and the dynamic simulation of the earthquake simulator are carried out with ADAMS software. Finally, FEM model of the earthquake simulator is given and the modal analysis of the earthquake simulator is made with ANSYS software.

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