Experimental Evaluation of Pressure Stability under Adaptive Mechanical Control in WASH-Compliant Water Systems

Abstract

: One of the determinants of safe continuous and contamination-resistant water delivery is stable hydraulic pressure that ensures delivery systems meet the WASH standard. The change in pressure caused by fluctuation in demand, occasional supply and mechanical interruptions can reduce the reliability of the services, accelerate the degradation of the infrastructure, and increase the probability of the intrusion of contaminants. An adaptive mechanical pressure stabilization and real-time sensing feedback system of variation-based stiffness modulation working on a controlled laboratory testbed is experimentally tested in line with the characteristics of decentralized WASH conditions of operation. The control is increasingly being dominated by the hydro-mechanical dynamics, adaptive control formulation, and performance measures; pressure variance, settling time, and percentage overshoot. The results of test show approximately 45-60 percent reduction of the variation in pressure, 40-50 percent improvement of the settling time and nearly fifty percent reduction of the dynamic overshoot, compared with control procedure of constant stiffness. These quantitative advantages demonstrate an increase in disturbance rejection, enhancement of hydraulic stability and compliance with WASH service pressure constraints. Low power and lightweight sensing combined with supervisory control increases mechanical flexibility allowing it to be operated scalable when operating in a low resource environment. Adaptive mechanical regulation is considered by the results as a valid path to resilient, contamination-resistant and publicly-trustworthy water distribution systems, and the future projections have been made as a field scale validation, hybrid predictive control and network level coordination of distributed stabilization units.