Application Cases

Piezoelectric Ceramic Actuators are a novel type of micro-displacement device developed in recent years. They feature compact size, high thrust force, high displacement resolution and accuracy, and fast response times.

Experiment Name: Closed-Loop Control of Micro-Displacement Based on Piezoelectric Stacks

Experimental Principle: When an external electric field is applied to a piezoelectric ceramic, it causes a relative displacement between the internal positive and negative charge centers, resulting in polarization. This phenomenon can induce mechanical deformation in the material. By varying the voltage applied across the piezoelectric ceramic, the electric field strength within the material can be adjusted, thereby changing the output displacement of the piezoelectric ceramic and achieving high displacement resolution. Consequently, piezoelectric ceramics are considered ideal micro-displacement devices for many applications.

Experimental Block Diagram:

Experimental Process: A power amplifier is used to amplify the low-level signals from the data acquisition card to drive the piezoelectric stack. Given the inherently small displacement of the piezoelectric stack itself, a displacement amplification mechanism was designed to achieve a larger range of motion. An inductive displacement sensor then measures the displacement, converts it into an electrical signal, and feeds it back to the data acquisition card, thereby implementing closed-loop control.

Experimental Results: The experiment on hysteresis nonlinearity compensation for the micro-displacement of the piezoelectric stack was successfully completed. This solution demonstrates high tracking and positioning accuracy, fast response speed, and strong resistance to interference.

Role of the Power Amplifier: As the core component of the entire experiment, the power amplifier in this setup provides a 0-150V voltage signal to drive the piezoelectric stack and generate displacement.

Recommended Power Amplifier: ATA-P Series Power Amplifier

Figure: ATA-P Series Power Amplifier Specifications

Application Fields: Optical Control, Mechanical Engineering

Application Scenarios: Lens Deflection, Precision Machining, Optical Fiber Stretching, Piezoelectric Dispensing Valves

This document has been compiled by Aigtek. For more application cases and detailed product information, please follow us. Xi'an Aigtek Electronics has become a large-scale instrument and equipment supplier with a wide range of product lines in the industry. Demo units are available for free trial.