Figure 2. Oscillations (top trend) versus random deviations (bottom trend). An external source of oscillation could affect a control loop through the process or via the SP (if the latter is generated ...

The Control Loop Don Morgan Tuning a PID controller is pretty straightforward, once you know how to start and what steps to follow. In this series on motion control, we have already discussed ...

Creating a digital twin has become a major goal for digitalization, and it is easy to get intimidated by all the buzzwords. The digital twin concept is really about creating a macro control loop with ...

A PID controller’s objective is to produce a control signal that can dynamically reduce the difference between the output and the desired setpoint of a given system. Consider the exemplary scheme ...

Steve Sandler, Analytical Engineering, Inc. EDN (October 30, 2013) The non-invasive stability assessment is a method that uses an output impedance measurement to accurately determine stability without ...

The control loop must have sufficient gain and bandwidth to quickly adjust the duty cycle up or down as the FET transitions on and off. The output voltage swings between 10.5 volts and below 0.1 volt, ...

(Click on Image to Enlarge) Figure 1: A system with negative feedback The closed loop transfer function is: When 1 + G (s)H (s) = 0. the system is clearly unstable. Therefore the condition G (s)H (s) ...