Step-wise safe switching control of a constant turning force system Online publication date: Sat, 21-Mar-2015
by Fotis N. Koumboulis, Maria P. Tzamtzi, Christoforos E. Economakos
International Journal of Modelling, Identification and Control (IJMIC), Vol. 12, No. 3, 2011
Abstract: In this paper, we present the application of multivariable step-wise safe switching (MSWSS) in order to control a constant turning force system under varying cutting conditions. The non-linear part of the plant's model is considered to be unknown and it is approximated by a set of linearised models which are derived through identification around corresponding operating points. State feedback proportional-integral controllers are designed to achieve sufficiently fast settling time and keep the cutting force at the appropriate level as the cutting depth varies with time. The controllers are designed using a metaheuristic search algorithm so as to achieve the required performance simultaneously for two adjacent operating points. A state observer is used to estimate the acceleration of the servomechanism that determines the feed rate of the cutting machine. Closed-loop performance is illustrated through simulation results.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Modelling, Identification and Control (IJMIC):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook