Stabilizing Gain Selection of Networked Variable Gain Controller to   Maximize Robustness Using Particle Swarm Optimization
  Networked Control Systems (NCSs) are often associated with problems like random data losses which might lead to system instability. This paper proposes a method based on the use of variable controller gains to achieve maximum parametric robustness of the plant controlled over a network. Stability using variable controller gains under data loss conditions is analyzed using a suitable Linear Matrix Inequality (LMI) formulation. Also, a Particle Swarm Optimization (PSO) based technique is used to maximize parametric robustness of the plant. 
Indranil Pan, Saptarshi Das, Soumyajit Ghosh, Amitava Gupta
math.OC