Information Technology Journal1812-56381812-5646Asian Network for Scientific Information10.3923/itj.2016.1.9LiKai WeiXiuting WeiZhenxian ZhangLeian 12016151According to the nonlinear and strong coupling characteristics of water-injecting process of large displacement and high pressure reciprocating pumps, the system for monitoring water injection with constant pressure was constructed and then the fuzzy rules for constant pressure control was obtained through site test. Furthermore, fuzzy Proportion Integration Differentiation (PID) gain conditioner (FPGC) control algorithm was put forward, with the error and its changing rate of outlet total pressure of injection station as input variables. Finally, the water-injecting experiments using conventional PID control algorithm and FPGC control algorithm were carried out respectively. Practical application proved that the former algorithm can ensure the outlet main pressure error (less than 0.1 MPa) and depress the system oscillation, with its feasibility applied to injection station of large displacement and high pressure reciprocating pump verified.]]>Xu, H.F., J. Cao and X. Wu,201112204207Xu, X.F., H.S. Yin, Y.Q. Hou and Q. Zhong,200938688Liu, M.H.,201341209211Wang, H.Z.,2014128386Cheng, H.X., D.S. Zhang and L. Cheng,2013328112116Pandey, S.K. and V. Laxmi,20142014pp: 16De, R.R. and R.K. Mudi,20132474148Luo, Y.F., Y. Liu and J.L. Cheng,20143378381Zhang, G., F. Tian and J.P. Wang,2013610231026Qin, X.P. and G.J. Tan,200512137139Patil, N.J., R.H. Chile and L.M. Waghmare,20072007pp: 100104Sahraoui, M., M. Salem, M.F. Khelfi and T. Self,20122012pp: 912916Ning, Y.B., S.M. Li and X.X. Sun,201026207211Feng, Y.X., Y.M. Feng and Z.H. Li,201023640Johnson, J.A. and H.B. Smartt,19953149157Yan, X.Y., Q.C. Ren and Q.L. Meng,20068753756Xue, D.Y. and Y.Q. Chen,2007Huang, Z.Q., Z. Chen, G. Zheng, J.Q. Xue and X.Y. Li,2012524-52712171222Chang, Y.R., S.H. Wang and R.X. He,2013722585590Wu, Y.D., G.N. Qi, Q.S. Xie and Y.J. Lu,20052005Wu, X., H. Lu, S. Wu, K. Huang, J. Wan, W. Li and Z. Liu,2014720262032Liu, H.J., Y.W. Liu and L.A. Zhang,2014312Wang, R.L.,200761619