spatially interconnected systems
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Author(s):  
Hongyan Feng ◽  
Wenhui Liu ◽  
Hui Chen

In this paper, we investigate discrete-time uncertain spatially interconnected systems (USISs), where uncertainties are modeled by linear fractional transformation (LFT). First, the well-posedness, quadratic stability and contractiveness of discrete-time USISs are introduced. Second, a sufficient condition is proposed to guarantee that discrete-time USISs are well-posed, quadratically stable and contractive. Then, a more tractable condition is derived to check the well-posedness, quadratic stability and contractiveness of discrete-time USISs via a modified bilinear transformation. Besides, the robust distributed filters which inherit the structure of the plants are designed. A sufficient and necessary condition is presented to guarantee the existence of the robust distributed filters. Finally, a vehicle platoon model demonstrates the effectiveness of the proposed scheme.


Mathematics ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1528
Author(s):  
Longhui Zhou ◽  
Hongfeng Tao ◽  
Wojciech Paszke ◽  
Vladimir Stojanovic ◽  
Huizhong Yang

This paper puts forward a PD-type iterative learning control algorithm for a class of discrete spatially interconnected systems with unstructured uncertainty. By lifting and changing the variable of discrete space model, the uncertain spatially interconnected systems is converted into equivalent singular system, and the general state space model is derived in view of singular system theory. Then, the state error and output error information are used to design the iterative learning control law, transforming the controlled system into an equivalent repetitive process model. Based on the stability theory of repetitive process, sufficient condition for the stability of the system along the trial is given in the form of linear matrix inequalities (LMIs). Finally, the effectiveness of the proposed algorithm is verified by the simulation of ladder circuits.


2019 ◽  
Vol 31 (3) ◽  
pp. 1005-1028
Author(s):  
Olivier Bachelier ◽  
Thomas Cluzeau ◽  
Francisco José Silva Alvarez ◽  
Nima Yeganefar

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