week10_Pneumatics - MKM-503E MECHATRONIC SYSTEM COMPONENTS...

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1 İ stanbul Technical University MKM-503E MECHATRONIC SYSTEM COMPONENTS Fall 2007-2008 Week 10 Pneumatics Dr. Erdin ç Altu Altu ğ 2 İ stanbul Technical University This week Pneumatic Systems and Control ± Introduction ± What is pneumatics? ± Why to use pneumatics? ± Pneumatic system elements ± Sample circuits ± Pneumatics circuit diagram ± Example Videos
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3 İ stanbul Technical University Actuators 1. Electrical 2. Hydraulic 3. Pneumatic Pneumatic actuators use air (safe, low-cost, readily available) or other gases under pressure to control power. Used to produce linear and rotary motions Usually used to control final control elements (to activate large valves etc.) Hydraulic systems can exert more force, but more expensive Drawback of pneumatics is compressibility of air 4 İ stanbul Technical University
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5 İ stanbul Technical University Video 6 İ stanbul Technical University Where are they used ?
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7 İ stanbul Technical University Video: Pneumatics in Automation 8 İ stanbul Technical University Videos: Other uses of Pneumatics Biped Robot Lucy Material Transport
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9 İ stanbul Technical University Why should we use pneumatics? Advantages: z Weight (they weight less than the motors) z Simplicity (easy to assemble and use) z To apply considerable forces with small elements z Easy to use z Modular z Reliable (shock resistant) Disadvantages: z Noise – due to the compressor z Compressor weight (big disadvantage) z Limited gas volume 10 İ stanbul Technical University A pneumatic system
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11 İ stanbul Technical University Elements of a pneumatic system 1. Compressor 2. Reservoir 3. Regulator 4. Pressure Sensor 5. Valve 6. Solenoid 7. Cylinder 8. Exhaust valve 9. Other elements 12 İ stanbul Technical University Pneumatic Power Supply Electric motor drives a compressor, cooler reduces the temperature, filter/water trap reduced contaminants, air receiver eliminates pressure flactuations. To circuit
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13 İ stanbul Technical University Compressor and Reservoir Compressor produces pressured air. Reservoir is used to store pressured air. 14 İ stanbul Technical University Video
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15 İ stanbul Technical University Video: Compressor working principle 16 İ stanbul Technical University Perfect Gas Laws Boyle’s Law: If the temp of a given amount of gas is held constant, the volume of the gas will change inversely with the absolute pressure of the gas. V1/V2 = P2/P1 Charles’ Law: If the pressure on a given amount of gas is held constant, the volume of the gas will change in direct proportion to the absolute temperature. V1/V2 = T1/T2
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week10_Pneumatics - MKM-503E MECHATRONIC SYSTEM COMPONENTS...

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