Application Cases

With the development of electronic control technology and precision manufacturing, an increasing number of micro-miniature high-precision actuators and sensors are being researched, manufactured, and widely applied. High-precision fluid delivery is an important means in modern technology. In clinical practice, the demand for precise control of insulin levels in diabetic patients is continuously increasing. Compared with other driving technologies, piezoelectric actuators have the advantages of small size, fast response speed, high power density and working frequency, high precision, long stroke, and good mechanical dynamic performance. Additionally, piezoelectric driving does not use coils, meaning it neither generates nor is affected by electromagnetic interference. Therefore, piezoelectric actuators can operate normally under harsh conditions such as strong magnetic fields and low temperatures.

The ATA-2042 high-voltage amplifier from Aigtek can provide an AC signal of up to 400 Vpp and can generate DC, AC sine, pulse, square wave, triangular wave, sawtooth wave, and arbitrary waveforms, which can drive piezoelectric materials and construct experimental environments.

Experiment Name: Design and Experimental Study of V-Type Stick-Slip Piezoelectric Actuators

Experiment Principle:

Stick-slip piezoelectric actuators rely on the deformation of piezoelectric ceramics to drive the stator, which in turn drives the slider through friction. The stick-slip principle mainly utilizes sawtooth wave electrical signals to cause elastic deformation of the flexible beam driven by the piezoelectric bimorph. During the contact between the stator and the slider, friction is generated. Due to the different elastic deformation speeds of the flexible beam at different stages, different states of friction force are produced, resulting in a displacement difference and thus achieving linear displacement output of the guide rail. This device can move in both forward and reverse directions.

Experimental Block Diagram:

Experimental Photograph:

Experimental Process:

The experiment first requires focusing the laser spot from the laser displacement sensor's optical head on the slider to determine the effective measurement range. The waveform generator is adjusted to produce a sawtooth wave signal, which is then amplified by the voltage amplifier to provide the required input voltage for the actuator. The output end is connected to the electrodes of the piezoelectric plate of the actuator. The laser displacement sensor is used to measure and collect the displacement of the slider's end. The displacement data is recorded by the controller of the laser displacement sensor. The measurement is repeated multiple times, and the collected data is saved to a computer for subsequent analysis and processing.

Application Directions:

• Aerospace

• Precision Machining

• Optical Engineering

• Bioengineering

• Semiconductor Manufacturing

Application Scenarios:

• Micro insulin infusion pumps

• High-precision fluid delivery and allocation

• Drug delivery

Product Recommendation:

Figure: Performance Parameters of the ATA-2042 High-Voltage Amplifier

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