Prevenção de Danos em Sistemas de Bombeamento Hidráulico usando uma Estratégia de Controle de Pressão (Preventing Damage in Hydraulic Pumping Systems by using a Pressure Control Strategy)

Erick Melo Rocha (erickmr22@yahoo.com.br)1, Walter Barra Junior (walbarra@ufpa.br)1, Ábner César Santos Bezerra (abnercesar2@gmail.com)1, Hugo Menezes Barra (hugomenezes99@yahoo.com)2


1Universidade Federal do Pará
2Instituto Federal de Educação, Ciência e Tecnologia do Pará

This paper appears in: Revista IEEE América Latina

Publication Date: March 2017
Volume: 15,   Issue: 3 
ISSN: 1548-0992


Abstract:
This paper presents an experimental study on the development, implementation, and tests of a control strategy applied to pressure control in hydraulic pumping systems. The strategy aims at avoiding severe damage on the hydraulic system due to Water Hammer effects. To accomplish this, it is proposed a suitable modulating control of the pump electric motor torque in order to keep the pressure values in a safe region, for all set of operating conditions. A rig system has been developed to perform experimental tests. From step response tests in the hydraulic rig system, a transfer function model relating the pipe pressure to the motor speed was identified and subsequently applied for PID controller design. The PID control synthesis was performed by using pole-placement techniques and its performance has been assessed in comparison to a PID controller adjusted by using Ziegler-Nichols rules. The obtained results show that the proposed control strategy was able to assure safe plant operation even in extreme operation conditions, as in case of Water Hammer effect.

Index Terms:
Hydraulic pumping systems, PID control techniques, Fault-tolerant control systems   


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