The Higher-Gain Loop That Crossed Into Instability
Higher controller gain can reduce error and still destabilize a feedback loop. The characteristic equation sets the allowable range.
Topic: Control Systems
The Bode Plot That Lost 20 dB in One Decade
A DC gain of 100 gives 40 dB only in the low-frequency region. A first-order pole changes the slope above its corner.
The Gain-10 Loop That Only Reached 0.909
A forward-path gain of 10 does not mean a closed-loop gain of 10. Reduce the feedback loop before predicting output.