2005, Volume 7, Issue 8
Strategic Study of CAE >> 2005, Volume 7, Issue 8
Solution of Network-induced Delay Using GPC With Predictive Error Compensation
1. School of Electrical and Automation Engineering, Tianjin University, Tianjin 300072, China
2. College of Automation Engineering, Qingdao University, Qingdao, shandong 266071, China
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Abstract
With regard to the characteristics of uncertain network-induced delay, an idea of using Generalized Predictive Control (GPC) is proposed in networked control systems. To overcome the influence of modeling mismatch and uncertainty of a system, an error predictive model is further built based on BP neural network, and error predictive value is used to compensate output predictive value, which forms a new control algorithm of GPC, and smooth filtering weighted controlled input variable is adopted. Random-delay-time characteristic of data transmission is tested in a networked control system. GPC and GPC with error compensation are compared in the system. GPC with BP error compensation is verified to have better performance in a modeling mismatch system.
Keywords
networked control systems (NCS) ; uncertain delay ; GPC ; neural network
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