Research on online VRFT data-driven control method and simulation

This paper proposed an on-line virtual reference feedback tuning(VRFT)method.Introduced an effective filter to shift time-sequence in off-line algorithm in order to obtain real-time computable data.Secondly it presented an on-line VRFT algorithm based on recursive least square method(RLSM) with forgetting factor.This method only used real-time data to get optimal controller on-line with no system information and identification.Simulation results show that the proposed method is self-adaptive and superior to conventional VRFT when dealing with time-variant system.