Stability and stabilization of nonuniform sampling systems

This paper is concerned with nonuniform sampling systems, where the sampling interval is time-varying within a certain known bound. The system is transformed into a time-varying discrete time system, where time-varying parts due to the sampling interval variation are treated as norm bounded uncertainties using robust control techniques. To reduce conservatism arising from modeling time-varying parts as a single uncertainty, the time-varying parts are modeled as N uncertainties. With larger N, a less conservative stability condition is derived at sacrifice of more computation. It is shown through a numerical example that the proposed stability condition is better than existing stability conditions. Key words: sampled-data control, stability, linear matrix inequalities, networked control systems

• Type: Journal
• Year: 2008
• Where: AUTOMATICA
• Authors: Young Soo Suh
• Keywords: AUTOMATICA 2008, Stability Conditions, Time-varying Discrete Time, Time-varying Parts