ECE5320 Mechatronics Assignment#01: Literature Survey on Sensors and Actuators Topic: Electroactive Polymer ActuatorsOutlineReference listTo explore furtherTo explore further(cont.)Slide 6Slide 7Slide 8Major ApplicationsBasic Working Principle IllustratedExample of EAP PrincipleSlide 12Major SpecificationsAdvantages of EAP type ActuatorsDisadvantages of EAP type ActuatorsAdvantages of Ionic type ActuatorsDisadvantages of Ionic type ActuatorsRelevant IssuesDemonstration of UseSlide 20Slide 21Where to purchase EAP acutuatorsECE5320 MechatronicsAssignment#01: Literature Survey on Sensors and Actuators Assignment#01: Literature Survey on Sensors and Actuators Topic: Electroactive Polymer Actuators Prepared by: Curtis DanceDept. of Electrical and Computer Engineering Utah State UniversityE: ; T: (435)797-; F: (435)797-3054 (ECE Dept.)W: http://3/10/200601/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-2Outline –Reference list–To probe further–List of Leading EAP Materials–Major applications–Basic working principle illustrated–Major specifications–Advantages of EAP type actuators–Disadvantages of EAP type actuators–Advantages of Ionic type actuators–Disadvantages of Ionic type actuators–Relevant Issues–Demonstration of Use–Where to Purchase01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-3Reference list•http://eap.jpl.nasa.gov•http://www.jpl.nasa.gov/events/lectures/feb02.html•http://electrochem.cwru.edu/ed/encycl/art-p02-elact-pol.htm•http://www.wired.com/wired/archive/12.03/start.html?pg=13•//www.sensorsmag.com/news/0106ami_main.shtml•http://www.sensorsmag.com/news/0106ami_main.shtml01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-4To explore further •“Actuators are driving many mechanisms that are use in our daily life “•“Increasingly, there are efforts to reduce their size, mass, and power as well as use them to operate biologically inspired devices” •“For many years, it has been known that certain types of polymers can change shape in response to electrical stimulation, however, initially these materials produced only a relatively small strain (stretching, contracting, or bending)”01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-5To explore further(cont.)•“Since the beginning of the 1990s, new electroactive polymer (EAP) materials have emerged that exhibit large strains and they led to a great paradigm change with regards to their capability. The unique properties of these materials are highly attractive for biomimetic applications such as biologically inspired intelligent robots”01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-6To explore further(cont.)•“Increasingly, engineers are able to develop EAP actuated mechanisms that were previously imaginable only in science fiction.” http://electrochem.cwru.edu/ed/encycl/art-p02-elact-pol.htm01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-7To explore further(cont.)•“Polymers that can be activated to change shape or size have been available for many years”•“The activation mechanisms include chemical, thermal, pneumatic, optical, and magnetic”01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-801/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-9Major Applications•Biomimetic Applications•Articulation Mechanism•Haptic and Tactile Interfaces•Smart Structures•Noise Control•Transducers•Power Generators•Drug-Delivery Systems http://electrochem.cwru.edu/ed/encycl/art-p02-elact-pol.htm01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-10Basic Working Principle Illustrated•“For EAP’s, Electricity causes a controlled, precise change in the polymer's shape”•“IPMC strips generally bend towards the anode and if the voltage signal is reversed they also reverse their direction of bending.”01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-11Example of EAP Principle01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-12Example of EAP Principle01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-13Major Specifications•Most EAP materials cannot handle repeated movements over a long period of time•EAP actuators offer larger movements than traditional electroactive ceramic actuators,but still not a large range of movement01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-14Advantages of EAP type Actuators•“Exhibit rapid response (milliseconds)” •“Can hold strain under dc activation” •“Induces relatively large actuation forces” •“Exhibits high mechanical energy density” •“Can operate for a long time in room conditions” http://electrochem.cwru.edu/ed/encycl/art-p02-elact-pol.htm01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-15Disadvantages of EAP type Actuators•“Requires high voltages (~100 mV/meter). Recent development allowed for (~20 mV/meter) in the Ferroelectric EAP” •“Independent of the voltage polarity, it produces mostly monopolar actuation due to associated electrostriction effect” http://electrochem.cwru.edu/ed/encycl/art-p02-elact-pol.htm01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-16Advantages of Ionic type Actuators•“Natural bi-directional actuation that depends on the voltage polarity”•“Requires low voltage” •“Some ionic EAP like conducting polymers have a unique capability of bi-stability” http://electrochem.cwru.edu/ed/encycl/art-p02-elact-pol.htm01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-17Disadvantages of Ionic type Actuators•“Requires using an electrolyte” •“Require encapsulation or protective layer in order to operate in open air conditions” •“Low electromechanical coupling efficiency” •“Except for CPs and NTs, ionic EAPs do not hold strain under dc voltage” •“Slow response (fraction of a second)” •“Bending EAPs induce a relatively low actuation force” •“Electrolysis occurs in aqueous systems at >1.23 V”http://electrochem.cwru.edu/ed/encycl/art-p02-elact-pol.htm01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and
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