Development and experimental characterization of a pneumatic valve actuated by a dielectric elastomer membrane

Due to their many features including lightweight and low energy consumption, dielectric elastomer (DE) membrane actuators are of interest for a number of industrial applications, such as pumping systems or valve control units. In particular, the use of DEs in valve control units offers advantages over traditional solenoid valves, including lower power requirements and relative simplicity in achieving proportional control. Additionally, DEs generate low thermal dissipation and are capable of virtually silent operation. The contribution of this work is the development of a new valve system based on a circular DE membrane pre-loaded with a linear spring. The valve is designed for pressurized air and operates by actuating a lever mechanism that opens and closes an outlet port. After presenting the operating principle and system design, several experiments are presented to compare actuator force, stroke, and dissipated energy for several pressure differentials and associated volume flows. It is observed that the DE-driven valve achieves a performance similar to a solenoid-based valve, while requiring a significantly lower amount of input energy. In addition, it is shown that DE-membrane valves can be controlled proportionally by simply adjusting the actuator voltage.

[1]  H. Choi,et al.  A self-sensing dielectric elastomer actuator , 2008 .

[2]  Srinivas Tadigadapa,et al.  Electroactive polymer based microfluidic pump , 2006 .

[3]  Thorben Hoffstadt,et al.  Online identification algorithms for integrated dielectric electroactive polymer sensors and self-sensing concepts , 2014 .

[4]  Heydt,et al.  Acoustical performance of an electrostrictive polymer film loudspeaker , 2000, The Journal of the Acoustical Society of America.

[5]  Stefan Seelecke,et al.  A Self-Sensing Approach for Dielectric Elastomer Actuators Based on Online Estimation Algorithms , 2017, IEEE/ASME Transactions on Mechatronics.

[6]  Micah Hodgins,et al.  An electro-mechanically coupled model for the dynamic behavior of a dielectric electro-active polymer actuator , 2014 .

[7]  D. Rossi,et al.  Dielectric elastomers as electromechanical transducers: Fundamentals, Materials, Devices, Models and Applications of an Emerging Electroactive Polymer Technology , 2008 .

[8]  Hidetoshi Kotera,et al.  Concepts for a new class of all-polymer micropumps. , 2006, Lab on a chip.

[9]  Samuel Rosset,et al.  Self-sensing dielectric elastomer actuators in closed-loop operation , 2013 .

[10]  G. Kovács,et al.  Dielectric elastomer actuators used for pneumatic valve technology , 2013 .

[11]  Stefan Seelecke,et al.  Modeling, Identification, and Control of a Dielectric Electro-Active Polymer Positioning System , 2015, IEEE Transactions on Control Systems Technology.

[12]  G. Rizzello,et al.  Closed loop control of dielectric elastomer actuators based on self-sensing displacement feedback , 2016 .

[13]  Iain A. Anderson,et al.  A thin membrane artificial muscle rotary motor , 2009 .

[14]  R. Pelrine,et al.  Sound radiation properties of dielectric elastomer electroactive polymer loudspeakers , 2006, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[15]  Eric Mockensturm,et al.  Modeling of a dielectric elastomer diaphragm for a prosthetic blood pump , 2003, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[16]  Stefan Seelecke,et al.  Development of a fatigue testing setup for dielectric elastomer membrane actuators , 2017, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[17]  Hyouk Ryeol Choi,et al.  A dielectric elastomer actuator with self-sensing capability , 2008, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[18]  Jean-Sébastien Plante,et al.  Dielectric Elastomer Jet Valve for Magnetic Resonance Imaging-Compatible Robotics , 2013 .

[19]  Stefan Seelecke,et al.  Systematic approach to development of pressure sensors using dielectric electro-active polymer membranes , 2013 .

[20]  Tiesheng Wang,et al.  Electroactive polymers for sensing , 2016, Interface Focus.

[21]  Xiaobo Tan,et al.  An integrated electroactive polymer sensor–actuator: design, model-based control, and performance characterization , 2016 .