Electrical Engineering-Systems Dept.

You are invited to attend a lecture by

Kun Liu

(Ph.D. student under the supervision of Prof. Emilia Fridman)

on the subject:

Networked Control Systems: A Time-Delay Approach

Networked Control Systems (NCS) are systems with spatially distributed sensors, actuators and controller nodes which exchange data over a communication data channel. Using such control structures offers several practical advantages:  reduced costs, ease of installation and maintenance and increased flexibility. It is important to provide a stability certificate that takes into account the network imperfections: variable sampling intervals and communication delays, scheduling protocols and quantization.

A classical approach to sampled-data control is based on discretization, which looses an information on the inter-sampling behavior and performance (Kalman and Bertram, 1959). To avoid the latter problem, a time-delay approach to sampled-data control was introduced in (Mikheev, Sobolev and Fridman, 1988), where the system was modeled as a continuous-time system with the delayed control input. The time-delay approach via Lyapunov method became popular in NCS.

In the present talk new extensions of the time-delay approach to NCS will be demonstrated, where variable sampling intervals, communication delays, protocol scheduling and quantization effects are taken into account.