Parker EME Setting up Compax3192-120101 N11 C3I11T11 November 2007 225The frequency response shows the amplification (value) and the phase shift(phase), which a signal is submittedd to when passing through a system.The displayed bode diagram allows the following conclusions:If a sine with 60Hz and an amplitude of 1A is present at the input, a sine delayedby 94° and an amplitude of 0.01m/s will result at the output.Mechanical systemFrequency response of a mechanic system: Current - velociy of a motor-20db / DecadeThe outlined course at the end of the measurement range does not permitstatements on the system measured due to disturbances. Due to the attenuation ofthe signals increasing with the frequency, the sensitiveness of the measurement todisturbances (signal to noise ratio) increases with a rising frequency. The value aswell as the phase response of the displayed frrquency response are "disturbed" atthe same intensity, this shows, that disturbances are the reason.The value response consists basically of a straight, which declines with a slope of -20dB/decade (-20dB/decade => per tenfold increase of the frequency, the valuedecreases also by factor ten.)the phase response remains however almost constantly at -90° over a relativelylarge range.In control technology, this is called integrating behavior (I-behavior).the I-behavior can be explained as follows.The measured current is proportional to the motor force and thus also to theacceleration of the driven mass. As the velocity is calculated from the integratedacceleration, the measured system looks as follows:f: disturbance torqueKt 2*Pi*J1velocity controlledsystemInput value is the current actual value, output value is the velocity actual value
