Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5004035 | ISA Transactions | 2016 | 7 Pages |
â¢Present a design method to improve control performance against disturbances.â¢Equivalent-input-disturbance (EID) approach is extended to handle a time delay system.â¢A delay-dependent stability condition is devised by the free-weighting matrix approach.â¢The gain of the state observer is designed by the cone complementary linearization method.â¢The SP-EID control method demonstrates its validity and the superiority.
This paper presents a new system configuration and a design method to improve control performance for a system with an input time delay and disturbances. The equivalent-input-disturbance approach is extended to handle a time-delay system. It is combined with the Smith predictor to reject disturbances. A delay-dependent stability condition is devised in terms of a matrix inequality by using the free-weighting matrix approach. The gain of the observer is designed by applying the cone complementary linearization method to the matrix inequality. A numerical example demonstrates the validity of the method.