Steel ball up and down magnetic suspension and motion control experimental facility

The invention relates to a steel ball up and down magnetic suspension and motion control experimental facility, a base of the facility is provided with a prop, the upper end of the prop is provided with an upper cover, the outer side of the upper part of the prop and the lower surface of the upper cover are provided with a circle of auxiliary steel balls, the exterior of the auxiliary steel balls is fixed with auxiliary steel ball fixing sheath, the upper end of the auxiliary steel ball fixing sheath is connected with the upper cover, a down suspension steel ball or an iron ball is located outside the prop and below the circular arrayed auxiliary steel balls, the upper cover is provided with a limiting outer ring and a limiting inner ring, a permanent magnet used for suspension is arranged between the limiting outer ring and the limiting inner ring, a permanent magnet used for control is arranged at the internal side of an inner circle tangential with the inner circle horizontally, at least one plastic pipe m