Motion Control — Winter 2018

What are the advantages and disadvantages of Step motors? Explain the step motor performance characteristics in detail.

Give the difference between the PLL and PLS systems. Derive the linearized model for the phase-locked servo systems.

Explain Bipolar PWM DC motor amplifiers.

Explain effect of lead angle in closed-loop control of Step motors.

Explain the effect of backlash and dead zone in incremental motion. Draw and explain the displacement and velocity waveforms for backlash with low and high friction.07

Why Incremental encoders are needs? What are the types of it? Explain each parts of the Incremental encoder in details.

Explain the role of speedup capacitor in active suppression controller.

Explain the working of position control system using with and without tachometer feedback.

List the selection criteria of DC motor as Incremental motion application. Discuss at least any two criteria with justification.

Draw and explain D.C. position control system with potentiometers as error detector.

List out the selection criteria for Stepper motor. Explain step angle resolution and torque requirements.

Explain Resolvers and Magnetic pickups as Encoders.

What do mean by Optimal control, suboptimal and non-optimal control for IMC? Explain it with appropriate mathematical justification.

What is torsional resonance? Explain its effect in three-body structure. Explain the techniques for minimizing torsional resonance effect in brief.

Enumerate the types of Pulse sources used in motion control. Explain the digital technique based Rate multiplier type pulse sources in detail.

Draw and explain bidirectional four-phase single and two phase on logic sequencer circuit with waveform of output phase for each pulses.

Why over drive circuits are required for Step motors? Explain dual voltage control circuit