Application Cases

Experiment Name: The Application of the ATA-62216 Power Amplifier in the Mechanical Output Experiment of Non-Resonant Piezoelectric Actuator Design

Experiment Content:In the field of piezoelectric actuation, actuators utilizing the stick-slip effect at high speeds and low frequencies have garnered significant interest. This study proposes an innovative linear piezoelectric actuator that integrates a two-stage amplification system and a Z-beam mechanism. The designed actuator exhibits good driving speed at low frequencies, overcoming the drawbacks of such actuators requiring two flexible mechanisms for reverse motion and poor reverse performance. The structure and dimensional design of the actuator are explained through theory and simulation. The actuator is fabricated using wire cutting technology, and finally, an experimental platform is set up using a signal generator, the ATA-62216 power amplifier, a capacitive displacement sensor, and the actuator for experimental testing. The experimental results show that the prototype is capable of bidirectional motion. Under an excitation of 400 Hz and 140 V, the actuator achieves a maximum speed of 12.88 mm/s. This study introduces a novel method for designing high-speed bidirectional slip-type piezoelectric actuators.

Research Direction: Piezoelectric Actuation, Flexible Mechanisms

Testing Equipment:ATA-62216 power amplifier, piezoelectric actuator, sensors, PC, and data acquisition equipment, etc.

Experimental Process:

The experimental setup consists of a piezoelectric actuator, sensors, a power amplifier (Model: ATA-62216, Aigtek, China), a PC, and data acquisition equipment. First, the effect of preload on the actuator is investigated. A signal generator is used to set a frequency of 300 Hz and an output voltage of 5 V, which is then amplified by the power amplifier and applied to the actuator. The preload on the actuator is adjusted using a micrometer screw at the back of the rail, while a push-pull force gauge is used to measure the magnitude of the preload. This process determines the optimal preload for the actuator for subsequent experiments. After obtaining the optimal preload, the speed of the designed actuator under different voltages (0-140 V) is tested, yielding a maximum speed of 12.88 mm/s. Subsequently, the resolution of the designed actuator is tested, and with the appropriate preload and voltage, the best resolution of 130 nm is achieved.

Experimental Results:

The experimental results show that the designed actuator can achieve a maximum speed of 12.88 mm/s and a maximum resolution of 130 nm. To realize high-speed motion at low frequencies and to enhance bidirectional motion capabilities, a stick-slip type piezoelectric actuator based on a two-stage amplifier was designed. Structural design and theoretical analysis were conducted, and an experimental system was set up. The experimental results validated the good performance of the designed structure. Under an excitation of 140 V and 400 Hz, the maximum speed was 12.88 mm/s. At 5 V excitation, the highest resolution was 130 nm. The experiments demonstrated that the prototype could achieve long-stroke, stable motion. This paper provides a new method for the design of non-resonant linear piezoelectric actuators, facilitating the practical application of stick-slip type piezoelectric actuators in precision positioning, precision manufacturing, and biomedical and optical equipment.

Xi'an Aigtek Electronics is a high-tech company specializing in the research, development, production, and sales of electronic measurement instruments such as power amplifiers, high-voltage amplifiers, power signal sources, preamplifiers for weak signals, high-precision voltage sources, and high-precision current sources. It provides users with competitive testing solutions.