Practical State Estimation With Event-Triggered Sliding Mode Observer

• 成果类型: Article
• 署名作者: Mondal, Saikat; Behera, Abhisek K.
• 署名单位: Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Roorkee
• 刊物名称: IEEE TRANSACTIONS ON AUTOMATIC CONTROL
• ISSN/ISSBN: 0018-9286
• DOI: 10.1109/TAC.2023.3310665
• 发表日期: 2024
• 页码: 2461-2468
• 关键词: Event-based estimation; practical state estimation; robust sliding mode observer

摘要

This article deals with the practical state estimation for an uncertain dynamical system under feedback constraints. We propose an event-triggered sliding mode observer to estimate the states in the practical sense, i.e., arbitrary steady-state bound can be achieved for the estimation error irrespective of the disturbance signal. A new sliding mode observer is proposed with the discontinuous output error injection vector of the same order as that of the disturbance vector; therefore the observer can be represented by an interconnection of continuous and discontinuous dynamics. Two scenarios are considered for implementing this observer in the event-triggering framework, viz., the actuator side implementation and the sensor side implementation, in which the observer is run at the actuator and sensor sides, respectively. However, the event-triggering mechanism in both cases is placed in the sensor end to regulate the transmission of output/estimated values. It is shown under the observability assumption that the event-triggered observer estimates the states practically with intermittent communication and disturbance input. Finally, we take a practical example to illustrate the state estimation using the proposed sliding mode observer.