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General piezo symbols

 

Symbol

Description

    Unit       

Generel/

Noliac

A

Electrode surface area

  mm2

N

c

Stiffness coefficient

  N/m2

G

C

Capacitance

 F

G

d

Piezoelectric charge coefficient

C/N

G

f

Frequency

Hz

G

f max Maximum frequency

       Hz

N

fa

Anti resonance frequency

Hz

G

fr

Resonance frequency

Hz

G

Fb

Blocking force

N

N

F dyn Dynamic Force         N

N

g

gravitational constant

kg m / s2

G

gij

Piezoelectric voltage coefficienct

V•m/N

G

H

Height

mm

N

I

Current

A

G

Iavg Average Current         A

N

Imax Maximum Current         A

N

IE

Current Closed Circuit

V

N

ID

Inner diameter

mm

N

k

Coupling factor

 

G

k Stiffness of actuator     mm/N

N

K0

Spring constant

mm/N

N

K

Relative dielectric constant

 -

G

l0 Nominal Displacement        m

N

L

Length

mm

N

Lc

Clamping length (on plate benders)

mm

N

∆L

Maximum free displacement