Analytical Modeling and Validation of a Preloaded Piezoceramic Current Output

Area of Science:

• Materials Science
• Electrical Engineering
• Mechanical Engineering

Background:

• Piezoceramic energy harvesting is crucial for microelectromechanical systems (MEMS).
• Accurate equivalent circuits are vital for piezoceramic energy harvesting and sensing.
• Existing models lack accuracy under complex mechanical excitations.

Purpose of the Study:

• Develop a novel current output model for piezoceramics.
• Enhance the accuracy of piezoceramic current estimation under diverse conditions.
• Facilitate rapid output power assessment for energy harvesting applications.

Main Methods:

• Derived a multivariate model relating current output to piezo coefficients.
• Incorporated parameters for frequency, amplitude, and preload variations.
• Validated the model's predictive capabilities for various excitations and geometries.

Main Results:

• The new model accurately estimates piezoceramic current output under varied mechanical stimulation.
• Model parameters are directly linked to fundamental piezo coefficients.
• Current output can be calculated without direct experimental testing.

Conclusions:

• The developed model offers a more accurate and versatile approach to piezoceramic current output prediction.
• This facilitates efficient energy harvesting and sensing system design.
• The model supports rapid estimation of output power across different configurations and excitations.