References
1. G. Ellis, Control System Design Guide 2nd ed. , Academic Press, Boston, 2000. 2. P. Schmidt and T. Rehm, Notch filter tuning for resonant frequency reduction in dual inertia systems, in Proc. of IEEE IAS, Phoenix, Oct. 3-7, 1999, pp. 1730-1734. 3. S. Vukosavic and M. Stojic, Suppression of torsional oscillations in a high-performance speed servo drive, IEEE Trans. Ind. Elec. 45 1998 , 108-117. 4. H. Wertz and F. Sch tte, Self-tuning speed control for servo drives with imperfect mechanical...
Introduction to Tuning an Observer Compensator
Tuning an observer compensator is much like tuning a traditional control system. Higher gains give faster response but greater noise susceptibility and, often, lower margins of stability. A major difference is that the observer plant and sensor parameters are set in software thus, they are known accurately and they do not vary during operation. This allows the designer to tune observers aggressively, setting margins of stability lower than might be acceptable in traditional control loops. In...
Luenberger Observer Disturbances
Common sources of disturbance to control systems Effects of disturbances on traditional and observer-based systems Observed disturbance signals and disturbance decoupling Software experiments demonstrating effects of disturbance This chapter will discuss the sources and effects of system disturbances. Similar to Chapter 5, the presentation will analyze the Luenberger observer using transfer functions and confirm results through experimenting with models. In addition, the principle of...
421 Experiment 4D Elimination of Phase Lag
A brief investigation can verify the elimination of phase lag demonstrated with Experiments 4A-4C. Experiment 4D see Figure 4-12 displays three signals on Live Scopes C, the actual state, Y, the measured state, and CO, the observed state. At first glance, all three signals appear similar. However, upon closer inspection, notice that Y rightmost lags C top by about a division. For example, C crosses two vertical divisions at two time divisions after the trigger time, which is indicated by a...
Visual ModelQ Simulation Environment
When learning control-system techniques, finding equipment to practice on is often difficult. As a result, designers must often rely on computer simulations. To this end, the author developed Visual ModelQ, a stand-alone, graphical, PC-based simulation environment, as a companion to this book. The environment provides time-domain and frequency-domain analysis of analog and digital control systems. Visual ModelQ is an enhancement of the original ModelQ in that Visual ModelQ allows readers to...