Clamping controllable disc-shaped rotary type inertia piezoelectric actuator and actuation method

The invention discloses a clamping controllable disc-shaped rotary type inertia piezoelectric actuator and an actuation method. The actuator is composed of a base, a clamping housing, a bearing, an output ring, clamping rhombic rings, clamping piezoelectric stacks, main movement blocks, mass blocks, driving rhombic rings and driving piezoelectric stacks, and the whole actuator is structurally symmetrical; the clamping rhombic rings and the driving rhombic rings are internally respectively in interference fit with the clamping piezoelectric stacks and the driving piezoelectric stacks, the mass blocks and the aforementioned parts are not in contact with the base, and mass centers are disposed in the same plane parallel to the base; and the output ring is connected with a fixation shaft at the center of the base through the bearing, the two clamping rhombic rings whose end surfaces are fixedly connected with the outer ring surface of the output ring are radially arranged at the two sides of the same diameter, axes of the clamping rhombic rings and the driving rhombic rings are vertical to each other, the two are connected through adjacent side surfaces of the main movement blocks placed on a plane of the base, the side surfaces of the mass blocks are fixedly connected with the driving rhombic rings, and other surfaces of the mass blocks are suspended above the base. The structure is novel, clamping is reliable, and bidirectional rotation can be realized.