Design a PID controller with missing packets in a networked servo-system

Ghude, Sarang (2007) Design a PID controller with missing packets in a networked servo-system. Coursework Masters thesis, University of Southern Queensland. (Unpublished)


Download (487kB)


Networked Control Systems (NCS) are defined as the systems in which a feedback control loop is implemented through a network. The networks employed for this task are based on a range of protocols. The data communicated through the network often face network congestions or collisions resulting in the loss of data carrying packets.
This can impose a serious problem for the stability of the networked control systems. In this project, one such problem is studied, “Design of a PID controller with missing
packets in a networked servo-system”. The controller under consideration is a discrete PID controller and the packets carrying error signals in a succession are considered
The plant is a part of an analogue servo-system. Thus, to use an analogue plant in a digital environment a digitization process is included and a networked model of the system is proposed. In the networked model of the servo-system, Ethernet is proposed as a network, so construction of Ethernet packet and reasons for its loss are given. In Simulations, the discrete PID controller and system showed undesirable characteristics, so the controller is tuned using Steepest Descent Gradient Method. To aid the quick functioning of the method, a program in C has been developed. The optimized responses with missing error packets are compared and analyzed.

Statistics for USQ ePrint 2421
Statistics for this ePrint Item
Item Type: Thesis (Non-Research) (Coursework Masters)
Item Status: Live Archive
Additional Information: Dissertation for Master of Engineering Technology (Computer-Systems Engineering). This dissertation was submitted as part of a coursework degree and is not regarded by USQ as a 'Research Thesis'.
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - No Department (Up to 30 Jun 2013)
Supervisors: Wen, Paul
Date Deposited: 11 Oct 2007 01:05
Last Modified: 22 Apr 2021 04:58
Uncontrolled Keywords: PID controller, control systems
Fields of Research (2008): 01 Mathematical Sciences > 0102 Applied Mathematics > 010203 Calculus of Variations, Systems Theory and Control Theory
Fields of Research (2020): 49 MATHEMATICAL SCIENCES > 4901 Applied mathematics > 490103 Calculus of variations, mathematical aspects of systems theory and control theory

Actions (login required)

View Item Archive Repository Staff Only