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Advanced Controls I

SKEL 121

Advanced Controls I

SKEL 121

Course Description

Prerequisite: SKEL 102. Topics include: vacuum and vapor tubes, resistance welding controls, induction heating, motors, inverters, polyphase rectifiers, op-amps transducers, instrumentation, closed loop controls, servo systems, temperature controls, troubleshooting. (75)

Outcomes and Objectives

Students will be able to demonstrate an understanding of power control fundamentals.

Objectives:

  • Describe the basic methods of controlling power in a DC circuit.
  • Describe the basic methods of controlling power in an AC circuit.
  • Describe the basic operation of a SCR, TRIAC, UJT, PUT, DIAC, and IGNITRON.
  • Analyze a phase shift control power system.
  • Analyze a pulse position control power system.

Students will be able to demonstrate an understanding of the power control techniques used in a resistance welding process.

Objectives:

  • Describe the basic principles of the resistance welding process.
  • Describe how resistance welding differs from other joining processes.
  • Describe the Sequence steps used in the resistance welding process.
  • Analyze a typical electronic control system used in a resistance welding machine.

Students will be able to demonstrate an understanding of the power control techniques used in the induction heating processes.

Objectives:

  • Describe the basic principles of induction heating.
  • Describe the relationship of frequency and the depth of heating.
  • Describe the various methods of creating the appropriate frequencies for induction heating.
  • Analyze a typical electrical/electronic circuit used in a motor-generator system.
  • Describe the metering system used in MG power units and be able to calculate the required tuning capacitance for a usable power factor.
  • Describe a typical Radio Frequency Oscillator system used to generate the very high frequency and high power needed for induction heating.
  • Analyze a typical electronic control system used to control the power of the RF Oscillator.
  • Describe the basic concepts of using SCR switching to generate AC power.
  • Analyze typical electronic circuits used to generate medium frequencies for induction heating.

Students will be able to demonstrate an understanding of polyphase rectification and the use of SCR's to control DC power.

Objectives:

  • Describe the benefits of polyphase rectification.
  • Analyze typical circuits used for polyphase rectification and the use of SCR's for control of the power output.
  • Describe the basic concepts of DC motor speed control.
  • Analyze typical electronic power control circuits for DC motor control using phase shift and pulse position firing of SCR's from an AC supply.
  • Describe the basic concepts of pulse frequency and pulse width control.
  • Analyze typical DC motor speed control using pulse frequency and pulse width control from a DC supply.

Students will be able to demonstrate an understanding of the basic feedback control systems used for process control and servomechanisms.

Objectives:

  • Describe the use of operational amplifiers to perform electronic integration and differentiation.
  • Describe the operation of an open loop control system.
  • Analyze the operation of an open loop control system.
  • Describe the operation of a closed loop control system.
  • Analyze the operation of a closed loop control system.
  • Draw functional block diagrams for closed loop control systems.
  • Compare the performance of on-off, proportional, proportional plus integral, proportional plus derivative, and P.I.D. control systems.

Students will be able to demonstrate an understanding of transducers and their use in measurement of control system parameters.

Objectives:

  • Describe the techniques used to measure displacement.
  • Describe the techniques used to measure force.
  • Describe the techniques used to measure pressure.
  • Describe the techniques used to measure temperature.
  • Describe the techniques used to measure velocity.
  • Describe the techniques used to measure light and other radiant energy.
  • Describe the techniques used to measure vibration and acceleration.
  • Describe the techniques used to measure liquid flow.
  • Describe the techniques used to measure humidity.
  • Describe the techniques used to measure magnetic changes.

Students will be able to demonstrate understanding of output devices used to control processes and machines.

Objectives:

  • Describe the operation of fluid valves.
  • Describe the operation of electrohydraulic servo valves.
  • Describe the use of relays and contactors.
  • Describe the operation of split phase AC motors.
  • Describe the operation of AC servo motors.
  • Describe the operation of DC servo motors.
  • Describe the operation of Stepper motors.
  • Describe the operation of brushless DC motors.

Students will be able to demonstrate an understanding of selected closed loop control systems used in typical industrial processes.

Objectives:

  • Analyze the operation of temperature control systems.
  • Analyze the operation of pressure control systems.
  • Analyze the operation of position control systems.
  • Analyze the operation of strip mill tension systems.
  • Analyze the operation of an automatic weighing system.
  • Analyze the operation of a CO2 gas controller on a carburizing furnace.
  • Analyze the operation of humidity control systems.
  • Analyze the operation of DC motor speed control systems.
  • Analyze the operation of AC motor speed control systems.
  • Analyze the operation of electro-hydraulic speed and positioning systems.

Students will be able to demonstrate an understanding of the basic principles of controlling processes and machines with microprocessors.

Objectives:

  • Describe the basic concepts of a microprocessor.
  • Describe the input/output circuits used to interface machine controls to a microprocessor system.
  • Describe the basic differences between microprocessor and programmable logic controller (PLC) systems.
  • Analyze the application of microprocessor control to robotics.