Quasi-static supporting unit, design method thereof and six-degree-of-freedom quasi-static platform

The invention belongs to the field of equipment damping and buffering control, and relates to a quasi-static supporting unit, a design method thereof and a six-degree-of-freedom quasi-static platform, and the quasi-static supporting unit comprises a shell, two electromagnetic spring clamp springs, a middle shaft, a movable iron core, two electromagnetic springs, two linear bearings, two spiral springs and two ball hinge mechanisms. The side, close to the movable iron core, of the electromagnetic spring is fixed through a step in the shell, and the side, away from the movable iron core, of the electromagnetic spring is fixed through an electromagnetic spring clamp spring. The spiral spring is in a compressed state when installed, one end is attached to the movable iron core, and the other end is pressed against the linear bearing. The ball hinge seat at one end of each quasi-static supporting unit of the six-degree-of-freedom quasi-static platform is connected with the lower end of the top platform, and the ba