Speed%20Limiter%20for%20Watercrafts

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Speed Limiter for Watercrafts

• Presented by
• Hadi Golkarieh
• Shahab Bagher
• Ali Alavi
• Nima Hossein-Javaheri
• Kambiz Daheshpour
• TA Hanliu Chen
• Professor Dr. Habash

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References

• K. R. Butts, N. Sivashankar, and J. Sun,
  Application of optimal control to the engine
  idle speed control problem, IEEE Trans. Control
  Syst.Technol., vol. 7, no. 2, pp. 258270, Mar.
  1999.
• D. Cho and J. K. Hedrick, A nonlinear controller
  design method for fuel-injected automotive
  engines, J. Eng. Gas Turbines Power, vol.
  110,pp. 313320, 1988.
• M. Abate and N. Dosio, Use of fuzzy logic for
  engine idle speed control, Soc. Auto. Eng.,
  900594, 1990.
• P. Micheau, R. Oddo, and G Lecours, IEEE
  TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL.
  14, NO. 3, MAY 2006
• S. D. Kaehler, Fuzzy Logic Tutorial,
  lthttp//www.seattlerobotics.org/encoder/mar98/fuz/
  flindex.htmlgt

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Abstract

• Controls the engine speed of the watercraft
• High rpm can shorten the life span of motor
• Prevents engine from stalling
• Achieved by changing the fuel to air ratio

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Possible Solutions

• PID Controller
• Fuzzy Logic
• Stochastic and Adaptive Control

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Controller
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The Block Diagram
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Fuzzy Logic Control

• Easier to implement since g function is
  non-linear
• Helps define a range of values for g function
• Two inputs Engine Reference Torque Speed
• One output Fuel/mass ratio

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Fuzzy Logic Control
Rule Table
Surface Map
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Outputs
Acceleration 0.5m/s2
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Outputs
Acceleration 2m/s2
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Possible Improvements

• More sophisticated fuzzy control logic
• Control the Air mass in the cylinders
• Include a PID controller to reduce the response
  time
• Insert pressure sensors on the propellers to
  estimate the load torque

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Conclusion

• Successfully simulated the desired control system
• Designed an innovative control system using fuzzy
  logic, despite the lack of the engines transfer
  functions

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Thank You!

• Any Questions?