Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2014.2530.2535VenkateshSivanandam RamkumarK. AmirtharajanRengarajan 1220141420Humidity control plays significant role in various industries
to get desired product output. An experiment was conducted in the laboratory
scale to model a humidity process and to control the same. Open loop test was
conducted for the humidity process by introducing the step change and the relative
humidity of the exit air was measured. The data was best matched with first
order process with time delay. Proportional Integral (PI) controllers based
on Ziegler Nichols (ZN), Direct Synthesis (DS) and Internal Model Control (IMC)
methods were simulated in MATLAB environment and the time domain specifications
showed better performance for IMC and DS based PI controllers.]]>Vijaya Selvi, A.J., T.K. Radhakrishnan and S. Sundaram,2006Bhaba, P.K., S. Sathishbabu, A. Asokan and T. Karunanithi,2007Mouna, B.H. and S. Lassaad,2007Bequette, B.W.,2003Chen, D. and D.E. Seborg,2002Coughnwar, D.R. and S.E. Leblanc,1991Erdal, S.M., A. Toker and C. Acar,2001Foley, M.W., N.R. Ramharack and B.R. Copeland,2005Fruehauf, P.S., I.L. Chien and M.D. Lauritsen,1994Gomez, C.R. and M.V. Reyes,2001Hagglund, T. and K.J. Astrom,2008Han, X. and X. Zhang,2011Liau, L.C.K. and Y.K. Huang,2008Liu, X., Z. Li, Y. Jiang and B. Lin,2006Madhavasarma, P. and S. Sundaram,2007Madhavasarma, P. and S. Sundaram,2008Meenakshipriya, B., K. Saravanan, K. Krishnamurthy and P.K. Bhaba,2012Ajlouni, N. and S. Al-Hamouz,2004Nithya, S., A.S. Gour, N. Sivakumaran, T.K. Radhakrishnan, T. Balasubramanian and N. Anantharaman,2008Rao, A.D.,1989Rivera, D.E., M. Morari and S. Skogestad,1986Seborg, D.E., T.F. Edgar and D.A. Mellichamp,2004Soundaravalli, S., T.K. Radhakrishnan and S. Sundaram,2007Venkatesh, S. and S. Sundaram,2012Young, P.M., A. Sung, D. Traini, P. Kwok, H. Chiou and H.K. Chan,2007Ziegler, J.G. and N.B. Nichols,1993