ECE5320 Mechatronics Assignment#01: Literature Survey on Sensors and Actuators Topic: Electric Linear ActuatorsOutlineReference listTo explore further (survival pointers of web references etc)What is an electric linear actuator?Major applicationsBasic working principleLinear Electric Actuator ConstructionSlide 9Slide 10Slide 11Slide 12Slide 13Slide 14Available OptionsMajor specificationsMajor specifications (contd.)LimitationsHow to chooseWhere to buyECE5320 MechatronicsAssignment#01: Literature Survey on Sensors and Actuators Assignment#01: Literature Survey on Sensors and Actuators Topic: Electric Linear ActuatorsPrepared by:Jacob BrownDept. of Chemistry and Biochemistry Utah State UniversityE: [email protected] ; T: (435)797-1314W: http://www.chem.usu.edu/faculty_staff/webpages/jacobbrown.php3/7/200801/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-2Outline –Reference list–To probe further –What is an Electric Linear Actuator–Major applications–Basic working principle illustrated–Major specifications–Limitations–How to choose–Cost information–Where to buy01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-3Reference list1. A Wikipedia entry for Linear Actuators•http://en.wikipedia.org/wiki/Linear_actuator2. McMaster Carr•http://www.mcmaster.com/ search “linear actuators”3. B. Anderson, DC Linear Actuators, PowerPoint Presentation, 3/11/2005•http://mechatronics.ece.usu.edu/ece5320/Schedule/hw01-2005/Brett%20Anderson_Actuator.ppt4. W Bourgeous Linear Motor Introduction, PowerPoint Presentation, 3/11/2005•http://mechatronics.ece.usu.edu/ece5320/Schedule/hw01-2005/William%20Bourgeous_a.ppt01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-4To explore further (survival pointers of web references etc) •A Wikipedia entry for Linear Actuators–http://en.wikipedia.org/wiki/Linear_actuator•McMaster Carr–http://www.mcmaster.com/ search “linear actuators”•Society of Robotics–http://www.societyofrobots.com/actuators_solenoids.shtml01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-5What is an electric linear actuator?•A linear actuator is used to generate controlled physical linear displacement*.–Five main types of linear actuators [1]•Mechanical (direct human operation)•Hydraulic•Pneumatic•piezoelectric actuators•Electric (electro-mechanical)•An electric linear actuator is driven by a electric motor or solenoid–Rotating AC/DC motor–Linear motor–Solenoid* Linear displacement may be in a rotating frame of reference01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-6Major applications •Push and Pull Movement in 1-D•1-D movement in a rotating frame–Done by one or both end pined•Used for small to medium loads–Under 1 ton down to milligrams•Long Travel•Robotics•Industrial Automation•Precise Positioning01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-7Basic working principle•Rotating Motor Type–Motor rotates a lead screw (grey) “worm gear”–Lead nut (yellow) is prevented from rotating–Sliding tube (red) is pushed/pulled–Fixed Cover (black) keeps debris from the mucking up the screw•Gear Boxes exchange linear force for speed–Also allow for motors at 90 degrees to motion of travelAnimation courtesy of Wikipedia [1]01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-8Linear Electric Actuator Construction100lb maxCourtesy of McMaster Carr01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-9Linear Electric Actuator Construction1500lb maxCourtesy of McMaster Carr01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-10Linear Electric Actuator Construction•Typical Connection–Actuator–Control box•Computer controlled•Manual controlled (Hand or foot switch)Courtesy of McMaster Carr01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-11Linear Electric Actuator Construction•Linear Motor type–A linear motor is essentially a rotary electric motor laid down on flat surface. [1]Courtesy of [4]01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-12Linear Electric Actuator Construction•Common Linear Motor Types–Permanent Magnet Motors –Platen Type Linear Motors –Linear Induction Motors –U shaped Linear Brushless Motors –TubularCourtesy of [4]01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-13Linear Electric Actuator Construction•Telescoping Type–Does not allow rotating frame•Controllers can manipulate more than one actuator•Foot pedals depictedCourtesy of McMaster Carr01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-14Linear Electric Actuator Construction•Solenoid type–May be considered its own category–Spring and/or magnetic actuation–Fact acting, no or little position controlCourtesy of Society of Robotics01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-15Available Options•High Speed Operation•High Precision i.e. 0.004”•Manual/Computerized operationCourtesy of McMaster Carr01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-16Major specifications•Motor Voltage (DC/AC)•Current Draw while moving full load•Current Draw while holding full load–Can be 0 if mechanical brake is used•Operating Temperature Range•Lead Wire/electrical connection•Maximum Linear Speed•Travel Cycle•Internal stopping mechanism (if any)–Slip clutch or limit switches01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-17Major specifications (contd.)•Stroke length•Retracted Length•Maximum Length = Retracted + Stoke•Output Force•Position Feedback information•Size•Maximum/Minimum Duty cycle–Continuous operation01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-18Limitations•Trade off between linear speed and linear force•Bulky and heavy for large loads•If Lead screw is used–Stoke length must be taken up in housing01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-19How to choose•Choose maximum load •Choose stroke length–Note minimum length required•Choose Mounting options–Pined or permanent mount on each end•Voltage
View Full Document
Unlocking...