Dynamic Modeling and Structural Optimization of a Partially Laminated Piezoelectric-Metal-Piezoelectric Actuator

Area of Science:

• Mechanical Engineering
• Materials Science
• Applied Physics

Background:

• Piezoelectric actuators are crucial for precision motion control due to their electromechanical coupling.
• Existing models may not fully capture the behavior of partially laminated piezoelectric actuators.

Purpose of the Study:

• To establish a dynamic model for a partially laminated piezoelectric-metal-piezoelectric beam actuator.
• To derive analytical solutions for natural frequency and output displacement.
• To validate the model through finite-element analysis and experimental testing.

Main Methods:

• Euler-Bernoulli beam theory applied to a segmented beam model.
• Symmetric bonding of piezoelectric layers to a metal substrate.
• Continuity conditions at varying cross-section interfaces.
• Analytical derivation of natural frequency and displacement.
• Validation using finite-element analysis and experimental voltage-displacement response.

Main Results:

• An analytical dynamic model for the piezoelectric-metal-piezoelectric actuator was successfully established.
• Accurate analytical solutions for natural frequency and output displacement were derived.
• The model's predictions were validated against finite-element results and experimental data.
• The influence of geometric parameters on dynamic performance was systematically analyzed.

Conclusions:

• The developed analytical model accurately predicts the dynamic behavior of partially laminated PMP actuators.
• The study provides theoretical insights for optimizing resonance characteristics and displacement in PMP actuator design.
• This research offers valuable guidance for the development of advanced precision motion control systems.