Design of Observers for Nonlinear Sampled-data Systems based on Strict-feedback Systems

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K04453
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21040:Control and system engineering-related
• Research Institution: The University of Shiga Prefecture (2022); Shizuoka University (2019-2021)
• Principal Investigator: Katayama Hitoshi 滋賀県立大学, 工学部, 教授 (20268296)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: オブザーバ / 非線形サンプル値制御 / 非線形ネットワーク制御 / 状態変換

Outline of Final Research Achievements

In this research project, we have tried to design observers for nonlinear sampled-data systems by using both a change of the state variable and an extension of the state variable. Unfortunately, we have not found a good way to derive a class of systems that can be converted to strict-feedback systems for the purpose of the observer design. We still try to find a way to derive such a class.
We also consider the design of observers and output feedback stabilizing controllers for sampled-data strict-feedback systems with time-varying sampling periods and networked strict-feedback systems. We have developed two design methods of observers and output feedback controllers for such systems.

Free Research Field

工学

Academic Significance and Societal Importance of the Research Achievements

厳密フィードバック系は非線形システムの重要なクラスである。このクラスの時変なサンプリング周期を持つサンプル値系とネットワーク制御系に対し、オブザーバ設計法と安定化出力フィードバック制御器設計法を提案できるため、船舶、車両等の移動体に対し現実的な制御系設計法を提案できる。