Distributed Unknown Input Observer

• 成果类型: Article
• 署名作者: Cao, Ganghui; Wang, Jinzhi
• 署名单位: Peking University
• 刊物名称: IEEE TRANSACTIONS ON AUTOMATIC CONTROL
• ISSN/ISSBN: 0018-9286
• DOI: 10.1109/TAC.2023.3293451
• 发表日期: 2023
• 页码: 8244-8251
• 关键词: distributed estimation; linear time-invariant systems; multiagent systems; sensor networks; unknown input observers (UIOs)

摘要

In this article, a distributed observer is designed for the state reconstruction of continuous-time linear dynamical systems with unknown inputs. Specifically, a group of sensor nodes are employed to measure the output of such a system. Due to its limited measurement, a single node may fail to reconstruct the full state. By acting on a consensus cooperative strategy, however, each node can produce an accurate state estimate, regardless of the specific input signal. The attractive performance of distributed unknown input observer relies on nothing but common neighboring communication, as well as an adequate local measurement that overlaps the effect of the unknown input along system dynamics. Correspondingly, the required network connectivity and rank conditions are given, with their linkages to the classic result being discussed.