Interval observer design and related techniques have been researched and applied in many engineering fields and continue to be an active research area in the estimation and control society for the last two decades. An Interval observer is a special class of observers that generates a bounded interval vector for the real state vector in a guaranteed way under the assumption that the uncertainties are unknown but bounded. Some of the basic concepts and the main developments in the designs and applications of interval observer for continuous-time, discrete-time (linear and non-linear), fuzzy and switched systems are reviewed in this work. It also provides a brief discussion of the main approaches in this area with clear descriptions of their structures and future directions.

中文翻译：

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不确定动力系统区间观测器的设计与应用

间隔观测器设计和相关技术已经在许多工程领域进行了研究和应用，并且在过去的二十年中继续成为估计和控制社会中活跃的研究领域。间隔观察者是一类特殊的观察者，它在不确定性未知但有界的假设下，以有保证的方式为真实状态向量生成有界间隔向量。本文对间隔观测器在连续时间，离散时间（线性和非线性），模糊和切换系统的设计和应用中的一些基本概念和主要发展进行了综述。它还简要介绍了该领域的主要方法，并对其结构和未来方向进行了清晰描述。