A Delay-Dependent Dual-Rate PID Controller Over an Ethernet Network

作者：Cuenca Angel^*; Salt Julian; Sala Antonio; Piza Ricardo

来源：IEEE Transactions on Industrial Informatics, 2011, 7(1): 18-29.

DOI：10.1109/TII.2010.2085007

• Multirate control systems
• network delay
• networked control system
• PID controller
• stability analysis

In this paper, a methodology to design controllers able to cope with different load conditions on an Ethernet network is introduced. Load conditions induce time-varying delays between measurements and control. To face these variations an interpolated, delay-dependent gain scheduling law is used. The lack of synchronization is solved by adopting an event-based control approach. The dual-rate control action computation is carried out at a remote controller, whereas control actions and measurements are taken out locally at the controlled process site. Stability is proved in terms of probabilistic linear matrix inequalities. TrueTime simulations in an Ethernet case show the benefit of the proposal, which is later validated on an experimental test-bed Ethernet environment.

• 出版日期2011-2