Design of a piezoelectric actuator and compliant mechanism combination for maximum energy efficiency

The combined optimization of a compliant mechanism and a piezoelectric stack actuator for maximum energy conversion efficiency is considered. The analysis assumes all components to be free from dissipation and that the piezoelectric stack actuator is driven by an ideal sinusoidal voltage source. The energy conversion efficiency is defined as the ratio of the output mechanical energy to the input electric energy. Using linear two-port models, an analytical expression for the maximum energy conversion efficiency is derived. It is shown that the optimization of the piezoelectric stack actuator can be decoupled from the topology optimization of the compliant mechanism. Computational verification of the analytical results is presented for two ground structures modeled using frame elements. The trade-off between displacement amplification and maximization of the energy conversion efficiency is examined.

[1]  M. Frecker,et al.  Optimal Design and Experimental Validation of Compliant Mechanical Amplifiers for Piezoceramic Stack Actuators , 2000 .

[2]  S. Hall,et al.  Design of a high efficiency, large stroke, electromechanical actuator , 1999 .

[3]  Victor Giurgiutiu,et al.  Design of displacement-amplified induced-strain actuators for maximum energy output , 1997 .

[4]  Douglas K. Lindner,et al.  Combined Optimization of a Recurve Actuator and its Drive Circuit , 2003 .

[5]  Douglas K. Lindner,et al.  Development and demonstration of INSTAR: inertially stabilized rifle , 2003, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[6]  N. Kikuchi,et al.  Topology optimization design of flextensional actuators , 2000, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[7]  S. Torquato,et al.  Design of smart composite materials using topology optimization , 1999 .

[8]  Gih-Keong Lau,et al.  Topological optimization of mechanical amplifiers for piezoelectric actuators under dynamic motion , 2000 .

[9]  Sridhar Kota,et al.  Tailoring unconventional actuators using compliant transmissions: design methods and applications , 1999 .

[10]  Mary Frecker,et al.  Dynamic Topology Optimization of Compliant Mechanisms and Piezoceramic Actuators , 2004 .

[11]  Mary Frecker,et al.  Recent Advances in Optimization of Smart Structures and Actuators , 2003 .

[12]  Mary Frecker,et al.  Optimal Design and Experimental Characterization of a Compliant Mechanism Piezoelectric Actuator for Inertially Stabilized Rifle , 2004 .

[13]  Gregory N. Washington,et al.  Energy-based efficiency of mechanized solid state actuators , 2003, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[14]  Frederick T. Calkins,et al.  Predicting actuation efficiency of structurally integrated active materials , 1999, Smart Structures.

[15]  Mary Frecker,et al.  Topology optimization of compliant mechanical amplifiers for piezoelectric actuators , 2000 .

[16]  Gih-Keong Lau,et al.  Systematic Design of Displacement-Amplifying Mechanisms for Piezoelectric Stacked Actuators Using Topology Optimization , 2000 .

[17]  Noboru Kikuchi,et al.  Optimization methods applied to material and flextensional actuator design using the homogenization method , 1999 .