MTPTK05S50F2000SG [Datasheet Download]
・Open-loop stroke： 50 µm @ 150V (fixed-free)
*Tolerance value: 40～60 µm
・Operating voltage：-20 V ～＋150 V
・Stiffness in motion direction： 40 N/µm
・Resonance frequency(fixed-free): 2.1 kHz@130g of load
*Tolerance value: 1.6～2.5 kHz (@130g of load)
・Blocked force: 2.0 kN (*Tolerance value: 1.6～2.4kN)
・Capacitance: 11.0 µF
・Electrical connection: Red=+HV, White=GND
・Dimension: 5x16x52 mm
・Mechanical interface: 2-M3.0 Tapped hole at both sides
・Environment： 0 to 85℃ with humidity less than 40%
・Mass: 28 g
*All dimensions and specifications stated are nominal.
・Mechanical interface can be tailor with an addition option fees.
Specifications for strain gauge:
・Bridge Arm Resistance: 120ohm
・Bridge Excitation Voltage (VBE): 2V?(Max)
in 4 different colored wires(shown in figure)
with shield mesh
Electrical connection of Strain gauge:
Closed loop control
The piezo actuator (piezoelectric stack actuator) is known to have hysteresis, which effect the positioning accuracy. However, with a closed loop control, the linearity of the positioning accuracy can be guaranteed to a certain level depends on the positioning sensor used. Here is an example result of using the strain gages as a positioning sensor to form a closed loop to do a precise positioning with the piezo actuator. The structure of the closed loop system is illustrated below. The PID control method is utilized in the closed loop system.