Piezoelectric steering engine of bistable and control method thereof

US11094876B2 · kind B2 · utility

Assignee

• XI'AN JIAOTONG UNIVERSITY · CN

Inventors

• Minglong Xu · Tuji, CN
• Zijian Jing · Tuji, CN

Key dates

• Filing date: Jun 20, 2017
• Grant date: Aug 17, 2021
• Expiry date: Jun 29, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64C2027/8272
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A piezoelectric steering engine of bistable includes a base, four torsion units respectively fixed on the base, and four stiffness devices respectively located at a free end of the four torsion units. The four torsion units share the same structure, and are sequentially arranged at an interval of 90° in a same plane. The four stiffness devices share the same structure and are all connected to rudder blades. Every torsion unit includes a cantilever beam, a first macro-fiber composite actuator and a second macro-fiber composite actuator both of which are respectively attached to two opposite surfaces of the cantilever beam. A first stiffness device includes an elastic ring and a bearing pad mounted inside the elastic ring. After the cantilever beam passes through the bearing pad, a torque is exerted on the cantilever beam by the elastic ring through the bearing pad, resulting in the buckling of the cantilever beam.