This table consists of list of the symbols used on noliac.com. You will also find a short description of each symbol and the matching unit.
| Symbol | Description | Unit |
|---|---|---|
| A | Electrode surface area | mm2 |
| BF | Blocking force | N |
| c (c11, c33, etc.) | Stiffness coefficient | N • m-2 |
| cD (c11D, c33D, etc.) | Stiffness coefficient, constant dielectric displacement | N • m-2 |
| cE (c11E, c33E, etc.) | Stiffness coefficient, constant field | N • m-2 |
| c | Viscous damping | N • s • m-1 |
| C | Capacitance | F |
| Cd | Static capacitance | F |
| d (d31, d33, etc.) | Piezoelectric charge constants | C • N-1 |
| D (D1, D2, etc.) | Charge density components | C • m-2 |
| δL | Displacement | m |
| δθ | Position jitter | ° |
| E (E1, E3) | Electric field components | V • m-1 |
| εT(ε11T,ε33T) | Dielectric permittivity | F • m-1 |
| f | Frequency | Hz |
| fa | Anti-resonance frequency | Hz |
| Fb | Blocking force | N |
| Fdyn | Dynamic force | N |
| Fext. | External force applied on the system | N |
| Fpiezo | Modeled piezo effect | N |
| fr | Resonance frequency | Hz |
| FS | Free stroke | m |
| fx | Modeled piezo effect | N |
| g (g31, g33, etc.) | Piezoelectric voltage constants | m2 • C-1 |
| Iin | Input current | A |
| Imax | Maximum current | A |
| k | Stiffness | N • m-1 |
| K0 | Stiffness of spring | N • m-1 |
| k31 | Transverse coupling factor | |
| k33 | Longitudinal coupling factor | |
| keff | Effective electromechanical coupling factor | |
| kp | Planar coupling factor | |
| kt | Thickness coupling factor | |
| L | Inductance | H |
| L | Length | mm |
| λ | Wawelength | |
| L0 | Initial length | mm |
| m | Mass | kg |
| meff | Effective moving mass | kg |
| n | Turns ratio of transformer | |
| NNDR | Number of points per cycle generated by the NDR | |
| NPAD | Reduction ration (number of teeth) of PAD | |
| Np | Frequency constant for radial mode | Hz • m |
| Nt | Frequency constant for thickness mode | Hz • m |
| P | Average power | W |
| q | Charge parameter | C |
| Qm | Mechanical quality factor | |
| R | Resistance | Ohm |
| S (S1, S2, etc.) | Strain components | |
| sD (s11D, s33D, etc.) | Compliance coefficients, constant dielectric displacement | m2 • N-1 |
| sE (s11E, s33E, etc.) | Compliance coefficients, constant field | m2 • N-1 |
| tcharge | Charging time | s |
| T (T1, T2, etc.) | Stress components | N • m-2 |
| tan (δ) | Apparent dissipation factor or loss factor | |
| θmin | Angular resolution | ° |
| U | Voltage | V |
| Umax | Maximum recommended voltage | V |
| Uout | Output voltage of Mason model | V |
| Up-p | Peak to peak voltage | V |
| Upiezo | Modeled piezo effect | N |
| VDC | Supply voltage | V |
| Vin | Input voltage | V |
| Vp-p | Peak to peak voltage | V |
| Vref | Reference voltage | V |
| W | width | mm |
| x | Position parameter | m |
| Zm | Minimum impedance at resonance | Ohm |
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