Control of the longitudinal dynamics of vehicle systems using fast-sampling techniques

Calderbank, JA

Abstract

In this thesis singular perturbation methods of
analysis have been applied to the design of algorithms
that will produce effective, robust and high integrity
fast-sampling control of the longitudinal motions of
two types of vehicle systems. Both centralized and
decentralized control of vehicle cascades is considered and
the expected differences in the responses of the closed-
loop systems identified by the use of asymptotic transfer
function matrices. Furthermore the terms used by other
authors are explained by use of the analytical asymptotic
expressions. It is also explained how the fast-sampling
controllers are able to entrain vehicles in cascades
without requiring excessive control actions or loss of
accuracy. The results of computer simulations of a ten
vehicle cascade undergoing a constant speed entrainment
manoeuvre with both centralized and decentralized controllers
are presented to emphasize the results of the study.
The dynamical properties of trains of vehicles are
presented and fast-sampling controllers are designed
for the control of the speed of trains having single
leading locomotives both without and with another
locomotive in the train. The transmission zeros of such
systems are identified and their physical meaning used toVlll
explain why the fast-sampling control algorithms are
able to cope with trains of differing lengths and
configurations and still produce good disturbance-
rejection and tracking properties. Finally, the theory
is illustrated by the presentation of the results of a
digital computer simulation study of the passage of a
very long train over a vertical reverse curve.

Citation

Calderbank, J. Control of the longitudinal dynamics of vehicle systems using fast-sampling techniques. (Thesis). Salford : University of Salford

• Thesis Type: Thesis
• Deposit Date: Oct 3, 2012
• Publicly Available Date: Oct 3, 2012
• Award Date: Jan 1, 1981