Tuning the P.I .V. Loop. To tune this system, only two control parameters are needed, the bandwidth (BW) and the damping ratio (z). An estimate of the motor’s total inertia, Jˆ and damping, bˆ are also required at set-up and are obtained using the motor/drive set up utilities. Figure 4 illustrates typical response plots for various
bandwidths and damping ratios. a) Damping fixed(z=1), Bandwidth varies b) Bandwidth fixed(BW= 20Hz), Damping varies Figure 4. Step Response curves for P.I .V. tuning.