Drive Tuning D2 Series Servo Drive User Manual
6-42 HIWIN MIKROSYSTEM CORP.
6.7.2.4 Nichols
The “Nichols” option of “Loop constructor” can analyze and simulate frequency responses of “Vel open
loop” and “Pos open loop” of control system. Using the check method can select to analyze and simulate
the Nichols diagram of “Vel open loop” or “Pos open loop”. It can also select two loops to analyze and
simulate at the same time. Nichols plots of “Vel open loop” and “Pos open loop” are shown in figure
6.7.2.4.1. Clicking the curve on the Nichols plot displays the value of frequency response for the analysis
of control system.
(1) Vel open loop (Velocity open loop): The frequency response of the velocity open loop of control
system
(2) Pos open loop (Position open loop): The frequency response of the position open loop of control
system
Figure6.7.2.4.1 Nichols plots of velocity open loop and position open loop
6.7.3 Filter
The control loop of drive provides two filters, which can be used at the same time. They are designed to
suppress the high-frequency noise, machine vibration, shortage structure rigidity, and so on.
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