Plant Identification Methods

Elmo provides numerous methods for plant identification and verification.

Identification:

• Fast Method – Requiring only 200 ms, this method uses a multi-sine signal to map the entire frequency range with minimal movement.

Sine Sweep Method – A frequency-by-frequency method to retrieve more accurate information. This method can also display multiple plants, as show below.

• • • Automatically uses the minimum sufficient current
    • Adaptively changes the current for resonance frequencies
    • An additional offset or carrier wave can be used when needed (ideal for low resolution A Quad B encoders)
    • Both open loop or closed loop (velocity or position) can be used
    • During velocity closed loop, the motor can be commanded to move with constant velocity (ideal for low resolution A Quad B, and for applications like propeller that can run only in one direction)

Current Verification:

• Live Step or Sine Wave Method – Displays each motor phase, and provides the ability to change controller parameters and see the results in real time.

Static Step Method – Displays a step for all motor phases, as shown below.

• Sine Sweep Method – Sweep by sinus and display for the closed loop.

Velocity/Position Verification:

• • Live Step or Sine Wave Method – Provides the ability to change controller parameters and see results in real time.
  • Sine Sweep Method – Sweep by sinus and display for the closed loop, with Bode plot.
  • Profile-Based Method – Perform verification according to the designated profile, as shown below.

Design Features

• Enables creating and saving multiple identifications to develop a design that is suitable for all plants
• Wizard interface, part of the Elmo Application Studio (EAS)

For more information please contact our motion control experts.

For more information please contact our motion control experts.