Control System Design Considering Packet Loss and Variable Time Delay in a Network-Based System

2017 ◽  
Vol 137 (2) ◽  
pp. 87-94
Author(s):  
Tooru Suhara ◽  
Hiromu Norizuki ◽  
Yutaka Uchimura
Keyword(s):  
Control System ◽  
Time Delay ◽  
System Design ◽  
Packet Loss ◽  
Control System Design ◽  
Variable Time Delay ◽  
Variable Time

scholarly journals Proportional-integral-plus (PIP) control of time delay systems

1998 ◽  
Vol 212 (1) ◽  
pp. 37-48 ◽  
Author(s):  
C J Taylor ◽  
A Chotai ◽  
P C Young
Keyword(s):  
Control System ◽  
Time Delay ◽  
System Design ◽  
Design Methods ◽  
Smith Predictor ◽  
Delay Systems ◽  
Control System Design ◽  
Time Delay Systems ◽  
Climate Control ◽  
Proportional Integral

The paper shows that the digital proportional-integral-plus (PIP) controller formulated within the context of non-minimum state space (NMSS) control system design methodology is directly equivalent, under certain non-restrictive pole assignment conditions, to the equivalent digital Smith predictor (SP) control system for time delay systems. This allows SP controllers to be considered within the context of NMSS state variable feedback control, so that optimal design methods can be exploited to enhance the performance of the SP controller. Alternatively, since the PIP design strategy provides a more flexible approach, which subsumes the SP controller as one option, it provides a superior basis for general control system design. The paper also discusses the robustness and disturbance response characteristics of the two PIP control structures that emerge from the analysis and demonstrates the efficacy of the design methods through simulation examples and the design of a climate control system for a large horticultural glasshouse system.

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