control-systems-principles.co.uk. Coupled drives 2: control and analysis
Coupled Drives 2: Control and analysis
Mark Readman, Hilde Hagadoorn, control systems principles.co.uk
ABSTRACT: This is one of a series of white papers on systems modelling, analysis and
control, prepared by Control Systems Principles.co.uk to give insights into important
principles and processes in control. In control systems there are a number of generic
systems and methods which are encountered in all areas of industry and technology. These
white papers aim to explain these important systems and methods in straightforward terms.
The white papers describe what makes a particular type of system/method important, how it
works and then demonstrates how to control it. The control demonstrations are performed
using models of real systems designed by our founder and senior partner Peter Wellstead,
and have been developed for manufacture by TQ Education and Training Ltd in their CE
range of equipment. This white paper uses the computer based control and simulation tool
CE20000 together with the coupled drives CE108.
1. Introduction
The coupled drive experiment is a multivariable system designed to demonstrate speed and tension
control. As described in the first white paper, two motors are connected to a jockey pulley with a belt that
acts as a flexible coupling. Dynamic coupling between the two drive motors and the jockey pulley is due
to the drive belt. By varying the speed of the motors the vertical position and the rotational speed of the
jockey pulley can be controlled. Belt driven systems are used extensively in the automotive industry
together with passive and active tension control. Tension and speed control is also an important issue in
the paper and steel industries. Normally in these areas tension is controlled by varying the web speed at
different locations. The manufactured paper or steel acts like a flexible belt. Control of vibration is also