A sensorless drive system for controlling temperature-dependent hysteresis in piezoelectric actuators

Area of Science:

• Materials Science
• Mechanical Engineering
• Electrical Engineering

Background:

• Piezoelectric actuators are crucial components in various devices.
• Current electronic controls for piezoelectric actuators often require temperature sensors to maintain performance across wide temperature ranges.
• This limitation restricts their application in environments with significant temperature fluctuations.

Purpose of the Study:

• To develop a novel drive system for piezoelectric actuators.
• To improve the operational characteristics, specifically the movement range, of piezoelectric actuators across a wide temperature range.
• To eliminate the need for temperature sensors in the control system.

Main Methods:

• A novel drive system was designed and implemented.
• The system leverages the inherent polarization characteristics of piezoelectric ceramics.
• Reverse polarization of the ceramic is achieved without external temperature measurement.

Main Results:

• Significant improvements in the operating temperature range for piezoelectric actuators were achieved.
• The novel system demonstrates enhanced operational stability across diverse temperatures.
• The elimination of temperature sensors simplifies the system design and reduces potential failure points.

Conclusions:

• The developed drive system offers a robust solution for enhancing piezoelectric actuator performance.
• This innovation expands the applicability of piezoelectric actuators in demanding thermal environments.
• The method provides a cost-effective and reliable alternative for controlling piezoelectric devices.