ECE5320 Mechatronics Assignment#01: Literature Survey on Sensors and Actuators Topic Plasma actuators and their applicationsActuator OutlineIntroductionPlasmaWhy plasma ?Plasma Actuator Computational ModelOperationPlasma ActuatorAir flow control by non-thermal plasma actuatorsSlide 10Advantages over other sensorsAdvantagesSensor SpecificationsApplicationsOther Plasma ActuatorsOther ammonia sensorsWhere to buyConclusionReferencesReferencesECE5320 MechatronicsAssignment#01: Literature Survey on Sensors and Actuators Assignment#01: Literature Survey on Sensors and Actuators TopicPlasma actuators and their applicationsPrepared by:Rakesh Reddy NagillaDept. of Electrical and Computer Engineering Utah State UniversityEmail:[email protected] F: (435)797-3054 (ECE Dept.)ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-2Actuator Outline –Introduction –Background–Basic working principle illustrated–Major specifications–Advantages –Application–Where to Buy–Conclusion–ReferencesECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-3IntroductionPlasmaIonization and Recombination A plasma is a gas in which an important fraction of the atoms is ionized , so that the electrons and ions are separately free.ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-4PlasmaIonization and radiative recombination rate coefficients for atomic hydrogenECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-5Why plasma ? •Electrode Geometry•Dielectric Permittivity•Voltage Specifications•Position of Plasma actuators•RobustnessECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-6Plasma Actuator Computational Model •Controlling subsonic aerodynamic flow by means of plasma actuators is an active area of research in both the Air Force (AF) and the general scientific community •The momentum transfer caused by the plasma actuator operates on a timescale much shorter than the duration of subsonic particle flow over an airfoil. •This inherent time difference allows scientists to integrate the plasma-induced momentum change over time and apply it as an averaged quantity.ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-7Operation• A typical plasma actuator consists of two offset electrodes separated by a dielectric material. • Plasma forms as the voltage difference between the electrodes ionizes the surrounding gas.• The electric field can then direct the charged particles in the plasma to transfer their momentum to the surrounding, neutral (i.e., nonionized) air.• Most of this momentum transfer occurs as a result of particle collisions. •The use of plasma actuators for flow control on AF weapon systems may offer several advantages over traditional flow control devices.ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-8Plasma ActuatorComputational modelECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-9Air flow control by non-thermal plasma actuators visualization of a manipulated airflow along a flat plate.ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-10 OperationIt has been shown that both corona-based and dielectric barrier based discharges could be established at the wall of a dielectric, at atmospheric pressure in air typically, the mechanical effect of such actuators is due to the induced-electric wind. Its time averaged velocity is typically a few ms−1, and it can reach 8ms−1 at about 0.5mmdistance from the wall. The body force created by the ion motion is globally about 0.15mN per watt of input electrical power, and the electro-mechanical efficiency is a few tenths of a percent in the absence of free air stream.ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-11Advantages over other sensors The main advantages of plasma actuator air flow systems are • Robustness,• Simplicity,• Low power consumption and • Ability for real-time control at high frequency.ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-12Advantages•Easy to construct and also to operate.•Compatible with other devices.•Scope for more applications.•Can be controlled through the properties of polymers. •The sensor is inexpensive compared to other sensors and easy in constructionECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-13Sensor Specifications Depending on the different applications that are performed using the plasma actuator, the specifications are changed.ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-14Applications• MEMS Plasma Actuators for Separation Flow Control.•MEMS Plasma Actuators for Wave Propulsion.•Plasma Actuators for High Reynolds Number.•For High speed Jet Control.•EHD Plasma Actuators for Subsonic Plasma Aerodynamics, Including Flow Acceleration, Attachment, and Boundary Layer Control Applied to Airfoils, Jet Engines, and Wind TurbinesECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-15Other Plasma ActuatorsFlow Control Using Plasma Actuators andLinear/Annular Plasma Synthetic Jet ActuatorsCross section of a linear actuator , jet induced by plasmaECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-16Other ammonia sensors Stream lines of plasma induced flowVelocity profilesECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-17Where to buy•There are some companies which manufacture Plasma Actuators. •Some of the websites where the Actuator specifications and price are specified •www.newequipment.com/NewsletterArchive/2005_02_16.htmlECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-18Conclusion•The Plasma Actuators have lots of uses especially in the air ways like jet navigation. Using the rare properties exhibited by the plasma, these are obtained. Thank YouECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-19References•http://www.wpafb.af.mil/news/story.asp?id=123033847•http://www.iop.org/EJ/abstract/0022-3727/40/3/s01 •http://ej.iop.org/links/rBATjhVG,/BrPRFeXT2xGkju66av5vpA/d7_3_s01.pdf•http://silas.psfc.mit.edu/introplasma/chap1.html#tth_sEc1.1.1ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-20References
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