X-shaped high-precision and high-expansion flexible displacement amplification mechanism

Abstract

The invention discloses an X-shaped high-precision and high-expansion flexible displacement amplification mechanism which comprises an outer X-shaped frame, a first actuator adapting push rod, a first intelligent material actuator, an output end flexible hinge, a fixed end flexible hinge, a second intelligent material actuator, an inner X-shaped frame, a second actuator adapting push rod and an inner and outer frame flexible connecting hinge. The upper end of the outer X-shaped frame is connected with the right end of the inner and outer frame flexible connecting hinge, the bottom end of the outer X-shaped frame is connected with the second intelligent material actuator, and the other end of the second intelligent material actuator is connected with the left end of the inner and outer frame flexible connecting hinge through the second actuator adapting push rod. The bottom end of the outer X-shaped frame is further connected with the fixed end flexible hinge. The upper end of the inner X-shaped frame is connected with the left end of the inner and outer frame flexible connecting hinge, the bottom end of the inner X-shaped frame is connected with the first intelligent material actuator, the other end of the first intelligent material actuator is connected with the right end of the inner and outer frame flexible connecting hinge through the first actuator adapting push rod, and the bottom end of the inner X-shaped frame is further connected with the output end flexible hinge.

Description

technical field [0001] The invention relates to an X-shaped high-precision and high-multiple flexible displacement amplification mechanism, which belongs to the technical field of precision driving. Background technique [0002] At present, the rudder surface control of the aircraft mainly adopts the power-by-wire PBW method to realize the air rudder drive; the power-by-wire method mainly has the following three forms: 1), integrated electro-hydraulic actuator IAP (Integrated Actuation Package); 2), Electromechanical actuator EMA (Electro-mechanical Actuator); 3), electric hydrostatic actuator EHA (Electro Hydrostatic Actuator). These three systems all use a rotating motor to cooperate with a motion conversion device (such as a pump body, a screw, etc.) to convert the rotary output into a linear output. The composition of the hydraulic system is complicated, and the volume and weight are relatively large. The traditional steering gear operation has a complicated transmissio...

AI Technical Summary

Problems solved by technology

Although smart materials have the advantages of high displacement precision and fast response speed, there is a key problem that the use of smart material actuators to drive the rudder surface has very little material deformation.

Smart material actuators usually only have a stroke of a few microns or tens of microns, which is far from meeting the requirements of rudder surface drives

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