Digital Control of High-Bandwidth Signals

Abstract

The interest in on-line digital control of processes handling signals with higher and higher frequencies, has focussed attention on the errors due to sampling and digital processing delays. The proposed solutions have shown an order of magnitude increase in the accuracy of the control tasks. However, like will be shown in this paper, stability of these proposed solutions shows the need of a careful interface design. Higher order digital filtering has detrimental effect on heavily damped responses. Limits are put on the bandwidth-damping combination and most useful tables are made available for further reference in practical work.