Piezoelectric apparatus for motorization

A piezoelectric motorization system for driving mechanical loads multi-dimensionally by an electronic circuitry comprising:

• a mechanically flexible body comprising at least one layer of piezoelectric plate having a top surface and a bottom surface;
• and
• at least two groups of paired electrodes placed respectively on the top and the bottom surface of each piezoelectric plate and electrically connected to a corresponding output of the electronic circuitry;
• wherein
• the electronic circuitry controls the driving of the mechanical loads by the mechanically flexible body by injecting at least two sets of control signals respectively into different groups of paired electrodes positioned on the piezoelectric plate;
• and
• each control signal operates at least two groups of driving frequencies with an adjustable amplitude ratio and an adjustable phase difference among driving frequencies, and, under a set of boundary conditions exhibited by a set of structural dimensions of the mechanically flexible body, induces multi-mode resonance of the mechanically flexible body for driving the mechanical loads multi-dimensionally.

A piezoelectric motorization system for driving mechanical loads of a three-dimensional mass multi-dimensionally by electronic circuitry, the three-dimensional mass having three mutually orthogonal surfaces, the system comprising:

• a) at least three mechanically flexible bodies each having one or more surfaces and placed adjacent to a corresponding one of the three mutually orthogonal surfaces of the three-dimensional mass;
• and
• b) at least two groups of a plurality of piezoelectric actuators, each group of piezoelectric actuators being positioned on one of the one or more surfaces of each mechanically flexible body at a corresponding actuating area and being electrically connected to a corresponding output of the electronic circuitry;
• wherein
• the electronic circuitry controls the driving of the mechanical loads by the mechanically flexible bodies by injecting at least two sets of control signals respectively into different groups of actuators positioned on each mechanically flexible body;
• and
• each control signal operates at least two groups of driving frequencies with an adjustable amplitude ratio and an adjustable phase difference among driving frequencies, and, under a combination of a set of boundary conditions exhibited by a set of structural dimensions of each mechanically flexible body, induces multi-mode resonance of the mechanically flexible bodies for driving the mechanical loads of the three-dimensional mass multi-dimensionally and moving the three-dimensional mass on a corresponding plane of one of the three mutually orthogonal surfaces.