Estimation of first and second order process model parameters

Publication Type:

Journal Article


Proceedings of The National Academy of Sciences (NASA), Springer, Volume 6, Issue 1, p.1-6 (2017)



Dept. of Electronics and communication Engineering.


In this paper, explicit expressions are proposed to estimate the unknown process model parameters during online and offline mode of operation. Mathematical expressions which are derived for second order system with time delay are generalized for second order overdamped, underdamped, critically damped, first order and unstable systems. The process information is extracted using relay with hysteresis which also reduces the effect of measurement noise. Under noisy environment as the process output is corrupted due to measurement noise, a closed loop denoising block is used to obtain noise free output. Validity of the presented method, with and without measurement noise, is demonstrated through simulation results which are compared with available methods in literature.