Engineering HDR Seminar Series 13, 2012: Fault Reconstruction using Sliding Mode Observers for Descriptor Systems

Mr Jeremy Ooi Hor Teong, RAM postgraduate

Date: 2012-07-18
Time: 10:00 to 11:00
Venue: Engineering meeting room 1, 5-4-22


In many practical dynamic systems, some states are not available but yet are required for the design of a controller. An observer can be used to estimate those states. However, many systems experience (unknown) faults which could cause standard observers to give inaccurate estimates. The Sliding Mode Observer (SMO) is a promising solution for robustly estimating those states despite the fault, and can also achieve fault reconstruction (which is useful for prescribing suitable corrective action). The descriptor system (also known as a singular system) is a special class of state-space systems which can be used to represent certain systems (which cannot be properly formulated by the normal state-space system). However, the SMO for descriptor systems have hardly been researched. This research project seeks to contribute to this area of knowledge and further unfold the potential of SMOs. In this report, a background of the relevant work is presented, followed by preliminary research done to date which involves using two SMOs in cascade, and concluded by proposed research and future plans. 

About the Speaker

Mr Jeremy Ooi graduated from Monash University with a Bachelor of Engineering degree in the Mechanical discipline in 2011. Upon completion, he returned and enrolled in the Master of Engineering Science (Research) program under the guidance of Dr. Edwin Tan Chee Pin and Dr. Ng Kok Yew. His research interest is in Control Theory with emphasis on Fault Reconstruction using the Sliding Mode Observer. This seminar is arranged as part of the fulfillment of the Faculty’s requirements for candidature conversion from Masters to PhD.