The predictive control for the networked control system with long time-delay

Author(s):  
Zhongda Tian ◽  
Shujiang Li ◽  
Yanhong Wang
2011 ◽  
Vol 201-203 ◽  
pp. 2087-2090
Author(s):  
Fang He ◽  
Xiao Li ◽  
Qiang Wang

In order to improve the performance of networked control system which has the characteristic of uncertain time delay, predictive control is adopted. The model of networked control system is analyzed. Take into account uncertain network time delay caused by various factors and problem of model mismatch, predictive controller is designed and simulation model of system is built using software of Matlab. A method of reducing model mismatch is proposed. Study results show that predictive control can make networked control system with good performance.


Author(s):  
Zhongda Tian ◽  
Yanhong Wang

This study proposes a novel predictive control compensation method to deal with random time-delay in networked control system. Different from other compensation strategies, this study adopts different compensation strategies for input time-delay and output time-delay to improve the control effect. First, for the input channel time-delay, the corresponding buffer is set by the time-stamp in the packet. Combining the historical output value and the control variable, the fast implicit generalized predictive control algorithm is adopted to design the predictive controller to compensate for the input channel time-delay. Second, for the output channel time-delay, the controller cannot measure it. A control compensator is designed by adding a feedback loop. The output control variable of the predictive controller is adjusted by predicting the error between the actual control signal and the controller output at the historical sampling time, so as to compensate for the time-delay of the output channel. In addition, the stability of the proposed time-delay compensation method is analyzed. Finally, simulation and experimental results show that the proposed method has good control and compensation effect, and improves the output performance of the system. The networked control system with random time-delay is stable. Furthermore, the simulation results also show that this time-delay compensation method needs less computing time and is more suitable for the practical applications.


2021 ◽  
Vol 40 ◽  
pp. 101019
Author(s):  
Komail Nekooei ◽  
Malihe Maghfoori Farsangi ◽  
Mojtaba Barkhordari Yazdi

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