"Maarten Wiltink" <[EMAIL PROTECTED]> writes: >"Unruh" <[EMAIL PROTECTED]> wrote in message >news:[EMAIL PROTECTED]
>> [...] (actually since it is >> a second order critically damped system, this is not really accurate. The >> correction action goes to zero faster than that, overshots by something >> like 20% and then comes back to zero). ... >Never thought I'd be picking nits about this, but isn't that a strongly >damped system? ISTR critical damping being defined as not overshooting. A critically damped system is one whose solution is (A+Bt) e^(-gt) If B is negative it overshoots. If B is 0 it approaches 0 as rapidly as possible. If B is positive it may actually increase before it decreases. My vague recollection is tha tthe parameters were chosen for ntp to be critically damped, but the initial conditions are in general such that B is negative. An underdamped system will always have oscillations (infinitely many but decreasing in amplitude. A critically or overdamped system can overshoot as well, but has the problem that in general it approaches equilibrium more slowly than a critically damped one. >Groetjes, >Maarten Wiltink _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
