Nonlinear PI Control with Adaptive Interaction Algorithm for Multivariable Wastewater Treatment Process

Table 4

Comparative of controller performance for Case 1.

		Benchmark PI	Fixed		Adaptive
				-%		-%
Dry	Mean	0.0840	0.0695	17.3052	0.0688	18.1381
	IAE	0.5883	0.4814	18.1724	0.4813	18.1894
	ISE	0.0840	0.0547	34.8616	0.0547	34.8616
	Max(dev)	0.3963	0.3101	21.7532	0.3058	22.8382
	Std(dev)	0.1095	0.0884	19.2915	0.0884	19.2915
Rain	Mean	0.0795	0.0688	13.4939	0.0666	16.2601
	IAE	0.5567	0.4665	16.2056	0.4665	16.2056
	ISE	0.0747	0.0513	31.3556	0.0512	31.4894
	Max(dev)	0.3851	0.2992	22.2958	0.2868	25.5162
	Std(dev)	0.1033	0.0856	17.1506	0.0855	17.2474
Storm	Mean	0.0809	0.0680	15.8978	0.0672	16.8872
	IAE	0.5660	0.4702	16.9229	0.4701	16.9405
	ISE	0.0789	0.0523	33.6934	0.0522	33.8202
	Max(dev)	0.3792	0.3005	20.7626	0.2970	21.6855
	Std(dev)	0.1062	0.0864	18.6057	0.0864	18.6057