应用科学学报 ›› 2010, Vol. 28 ›› Issue (4): 430-435.doi: 10.3969/j.issn.0255-8297.2010.04.017

• 控制与系统 • 上一篇    下一篇

利用点测量的分布参数系统状态重构

李谦, 李柠, 李少远   

  1. 上海交通大学自动化系,上海200240
  • 收稿日期:2010-02-05 修回日期:2010-07-12 出版日期:2010-07-23 发布日期:2010-07-23
  • 作者简介:李柠,博士,副研究员,研究方向:复杂系统建模与控制、模糊控制,E-mail: ning_li@sjtu.edu.cn
  • 基金资助:

    国家自然科学基金(No. 60604018, No. 60934007);上海市科委基础研究重点项目基金(No.10JC1403400)资助

Reconstruction of System State with Distributed Parameters Using Measurements from Finite Points

LI Qian, LI Ning, LI Shao-yuan   

  1. Department of Automation, Shanghai Jiaotong University, Shanghai 200240, China
  • Received:2010-02-05 Revised:2010-07-12 Online:2010-07-23 Published:2010-07-23

摘要:

分布参数系统的状态在空间上连续分布,但因传感器个数有限,难以获取其全部状态. 对此,该文针对抛物线型分布参数系统,根据有限个传感器点的测量信息,提出一种重构系统全部状态的方法并证明其可行性. 仿真结果表明,该方法在已知系统模型但未知初始状态的情况下可取得很好的状态重构效果,而且与分布参数状态观测器相比,只需要离散的传感器信息就能获得对系统初期状态的更好重构.

关键词: 分布参数系统, 传感器, 点测量, 状态观测器, 状态重构

Abstract:

The state space of distributed parameter system (DPS) is infinite dimensional and cannot be measured directly by a finite number of sensors. To solve this problem, we propose a state reconstruction method using a finite number of point measurements. Feasibility of the method is shown theoretically. Numerical simulation indicates that it can achieve good state reconstruction. In contrast to distributed parameter observers,
the proposed method only requires measurements taken at discrete time, and it can give better reconstruction of system’s early states.

Key words: distributed parameter system, sensor, point measurement, state observer, state reconstruction

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