scholarly journals Two-degree-of-freedom Control of a Piezoelectric Actuator with Hysteresis Compensation

2013 ◽  
Vol 21 (3) ◽  
pp. 503-508 ◽  
Author(s):  
M. SASAKI ◽  
Y. ARIGA ◽  
T. TAKEDA ◽  
S. ITO
Keyword(s):  
Piezoelectric Actuator ◽  
Degree Of Freedom ◽  
Hysteresis Compensation ◽  
Two Degree Of Freedom

scholarly journals A Novel Impact Rotary–Linear Motor Based on Decomposed Screw-Type Motion of Piezoelectric Actuator

2018 ◽  
Vol 8 (12) ◽  
pp. 2492
Author(s):  
Liling Han ◽  
Liandong Yu ◽  
Chengliang Pan ◽  
Huining Zhao ◽  
Yizhou Jiang
Keyword(s):  
Piezoelectric Actuator ◽  
Degree Of Freedom ◽  
Rotary Motion ◽  
Maximum Diameter ◽  
Torsional Angle ◽  
Driving Voltage ◽  
Driving Frequency ◽  
Linear Motion ◽  
Longitudinal Displacement ◽  
Two Degree Of Freedom

A novel impact two-degree-of-freedom (2-DOF) motor based on the decomposed screw-type motion of a piezoelectric actuator (PA) has been proposed. The fabricated prototype motor has a maximum diameter of 15 mm and a length of 100 mm which can produce a maximum torsional angle of about 1000 μrad and a maximum longitudinal displacement of about 1.03 μm under a saw-shaped driving voltage with 720 Vp-p (peak-to-peak driving voltage). When the axial prepressure generated by the spring is about 1N and the radial prepressure generated by the snap ring is about 14 N, the fabricated motor realizes rotary motion with the driving frequency from 200 Hz to 4 kHz. When the axial prepressure generated by the spring is about 11.7 N and the radial prepressure generated by the snap ring is about 21.1 N, the fabricated motor realizes linear motion with the driving frequency from 2 kHz to 11 kHz. In the experiments, the prototype motor can achieve 9.9 × 105 μrad/s rotary velocity at 2 kHz and it can achieve 2.4 mm/s linear velocity at 11 kHz under the driving voltage of 720 Vp-p.

Two Degree-of-Freedom Hysteresis Compensation for a Dynamic Mirror With Antagonistic Piezoelectric Stack Actuation

2013 ◽  
Author(s):  
James A. Mynderse ◽  
George T. C. Chiu
Keyword(s):  
Input Signal ◽  
Control Strategy ◽  
Closed Loop ◽  
Loop System ◽  
Degree Of Freedom ◽  
Closed Loop System ◽  
Loop Control ◽  
Hysteresis Compensation ◽  
Hysteresis Control ◽  
Two Degree Of Freedom

A methodology for designing a low-computation, high-bandwidth strategy for closed-loop control of a hysteretic system without a priori knowledge of the desired trajectory is presented. The resulting two degree-of-freedom hysteresis control strategy is applied to a dynamic mirror with antagonistic piezoelectric stack actuation. Hysteresis compensator is performed by a finite state machine switching polynomials for hysteresis inversion based on the input signal slope. Residual error after hysteresis compensation is corrected by an LQR feedback controller. Experimental results demonstrate effectiveness of the hysteresis compensator and closed-loop system under the proposed hysteresis control strategy. For the triangular input signal tested, the closed-loop system achieves a 91.5% reduction in hysteresis uncertainty with 60 kHz sample rate.

Sign in / Sign up

Export Citation Format

Share Document