-压电材料和制动器-英文翻译

3.0 闻远设计 2023-11-02 42 4 23.64KB 10 页 15光币

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Piezoelectric hydraulic drive design and testing

Jason ・ rand le, Eric ・ Anderson

In mountain view, California, the street 2565 nest, add empty bureau engineering

company

MaKeDong ・ raigor Prague

In mountain view, California, the street 2565 nest, the diamond advisory group

This paper introduces the design method of smart material is to build a use of

hydraulic fluid dynamic provide the drive. In described drives, hydraulic oil from the

hard drive of the frequency of piezoelectric or other intelligent material separation

output cylinder of running frequency. This kind of decoupling permitted in high

frequency piezoelectric driven by extracting substances, large energy highest in low

frequency, and hydraulic cylinder driving provide long stroke. However, due to follow

the compressibility of fluid and structural, basic impedance matching and fluid

piezoelectric hard to energy conversion between pressurized piezoelectric hydraulic

overflows into. In materials, mechanical design, and fluid mechanical interface field

of basic design weigh and important technical problems is debatable. Puts forward

prototype equipment and components measurement. Introduce test methods, test

quantitative pump, pressure and flow out power and speed. A series of experiments

show that by intelligent materials with powerful long stroke drive the possibility of

the device.

Keywords: piezoelectric, intelligent materials, piezoelectric hydraulic, drive,

power wires, pumps

introduction

Intelligent piezoelectric materials, such as magnetic limit and electric limited in

precise control long-term use. Because of its deformation ability is limited, these

materials are usually not used for large linear motion drive. The last decades appear

relied on various techniques to increase from the driving force of smart material core

design. One common is the mechanical amplifier or transformation, such as those who

are using the lever and the fulcrum, and repeat types, such as step, peristalsis.

Recently, researchers have realized integrated intelligent materials and liquid, make a

fundamental part of the pump to the possibility of using linear driver. This new

method to realize long stroke high power drive.

And includes regular servo hydraulic and various electromagnetic type,

compared to other types of drive, piezoelectric hydraulic drive has his merits and

demerits. Compared with the traditional hydraulic pressure, the main advantage

displays in wire aspects, namely, eliminate hydraulic distribution circuit. Compared

with electromagnetic method, including motor drive the ball screw, piezoelectric

hydraulic drive with powerful hydraulic and potentially more rapid response time.

Compared with conventional methods, a new type of drive in thermal hydraulic oil

distribution and have drawbacks. Compared with electromagnetic drives, although use

a small amount of hydraulic oil, new drive still need electrical and hydraulic

integration. Piezoelectric hydraulic drive many of these characteristics and electric

limit drives (EHAs) is the same, such as joint strike fighter planes in. EHAs than other

piezoelectric hydraulic drive in the energy density of piezoelectric materials

themselves have a potential advantage. Extracting this energy is a daunting task, this

paper tries to describe many current development efforts some of the challenges.

The overall design goal is to through different stages by piezoelectric stack

components by a drive conversion power input output VAT will mechanical power to

external load. Piezoelectric smart material, design began piezoelectric fluid interface,

extends across the valve, and finally to output cylinder. Although the electronic drive

drive in other local discussion, but it is also a consideration. Like many system,

overall design is a comprehensive and repeated work, a single component can be

design, but need to design combined with other subsystems. Subsystem and system

level in this process test components. Tests to individual elements of the interaction

between niv as characteristics. The total output (mechanical equipment strength,

speed, or power) measure and maximization is the ultimate goal.

This paper expounds the solid-liquid mixture drive, the operation and prominent

illustrate the basic concept of the limitations. Put forward the design concept of

actuators, and expounds the next each key subsystems. Review of important priority

piezoelectric properties of application. Decided to pressure the room design and

describing the prototype device. Analysis of some or all parts of test methods and

characteristics of the value of each method is emphasized. This article through the test

results and explain how generation of piezoelectric hydraulic equipment conclusions.

Solid-liquid mixer driven

The more widely spoken, piezoelectric hydraulic or intelligence material

hydraulic drive can be called "solid-liquid mixture" driver. The energy transferred to

intelligent materials production pressurized fluids. Then mechanical valve adjusting

oscillation fluid pressure to pressure fluid flow. With hydraulic accumulator and

another valve, solid medium can not required load frequency operation. Generally

speaking, solid drive running more often than required load frequency, maybe reach

100 times.

Although theoretically is attractive, but the actual restrictions would limit solid-

liquid mixture drive mode efficiency. In particular, fluid viscosity and compression

combined with active substances inherent in the mechanism, to limit the loss of

drivers and total output power effectively drive bandwidth. Meanwhile, if the

maximum power drive is available to drive mechanical load, must be very carefully

designed to transport and output fluid with drive characteristic.

Drive concept

Intelligent materials hydraulic transmission main part of the basic concepts as shown

in figure 1 below. This concept with the real photos in box design shown in figure 5

form. This device from external interface gain power and instructions and back to the

remote sensing data (such as loading or displacement) state or safety information.

Micro controller or low-end digital signal processor (DSP) necessary calculations, to

match the instructions, transmission remote sensing information, to regulate the drive

and valve timing. High power amplifier drive major intelligence material drive, low

power amplifier drive any of the active valve. The main pressure drive the fluid

pressure chamber, compression and valve quickly transmission fluid and cavities,

battery, and output equipment. Output driver piston driven frequency range for

internal drive drive frequency 1/100 to 1/50. Driver output driver loaded, and

transmission of remote sensing data, such as banner global perspective, is to provide

the embedded controller.

Piezoelectric materials and brake

In the past 20 years of development and evolution of equipment, the use of

piezoelectric actuator has already been accepted for is different from many

"intelligent structure" application. High density and high energy transfer is the basic

demand, not accurate location or vibration control.

Hybrid drive needs intelligent material used in the main pressure and some

architecture, as a means to promote positive valves. Due to a variety of reasons, the

choice is superior to other piezoelectric materials of choice. Compared to a size and

piezoelectric bandwidth requirements of the shape memory materials, therefore, in the

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摘要：

PiezoelectrichydraulicdrivedesignandtestingJason・randle,Eric・AndersonInmountainview,California,thestreet2565nest,addemptybureauengineeringcompanyMaKeDong・raigorPragueInmountainview,California,thestreet2565nest,thediamondadvisorygroupThispaperintroducesthedesignmethodofsmartmaterialistobuildauseofhyd...

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