The open-loop rise time tro was defined assuming nominal torque. Consequently, the closed-loop dynamics cannot be made significantly faster for large speed-reference steps. On the other hand, for smaller steps and other smaller changes, the dynamics can easily be speeded up, often by up to one decade, i.e., 0.1tro ≤ trc ≤ tro. An attempt to make the closedloop system too fast will result in too high a P gain, however; cf. (13). This gives a bang-bang-type control and often also an unreasonably high amplification of the measurement noise n.