Sliding Mode Observer Design for a Parabolic PDE in the Presence of Unknown Inputs

Sliding Mode Observer Design for a Parabolic PDE in the Presence of Unknown Inputs
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存在未知输入时抛物线偏微分方程的滑模观测器设计

DOI:
10.1002/asjc.1849
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发表时间:
2018-07
影响因子:
2.4
通讯作者:
Sarah K. Spurgeon
Sarah K. Spurgeon
中科院分区:
计算机科学4区
文献类型:
--
作者:
Yury Orlov;Sohom Chakrabarty;Dongya Zhao;Sarah K. Spurgeon

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本文研究了一类由抛物型线性偏微分方程(PDE)建模的系统的观测器设计问题。该系统被假设为只有一个空间维度,在该空间维度上,它被离散化以获得所谓的晶格系统,这是一组线性时不变(LTI)常微分方程(ODE),具有典型的Toeplitz结构,具有特定的稀疏模式。这种晶格结构被证明是特别适合于一步一步的滑模观测器的设计,可以重建离散点的状态估计和估计未知的输入。稳定和不稳定的偏微分方程的仿真结果表明,精确的状态估计,可以提供在离散点。一种方法来重建未知的输入演示。
This paper considers observer design for systems modeled by linear partial differential equations (PDEs) of parabolic type, which may be subject to unknown inputs. The system is assumed to have only one spatial dimension, over which it is discretised to obtain what is referred to as the lattice system, which is a set of linear time invariant (LTI) ordinary differential equations (ODEs) having a canonical Toeplitz‐like structure with a specific sparsity pattern. This lattice structure is shown to be particularly appropriate for step‐by‐step sliding mode observer design that can reconstruct the state estimates at the points of discretisation and estimate the unknown input. Simulation results for both stable and unstable PDEs show that accurate state estimates can be provided at the points of discretisation. An approach to reconstruct the unknown input is demonstrated.
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