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   Articles with "unknown inputs" as a keyword



Online state and unknown inputs estimation for nonlinear systems with particle filter based recursive expectation‐maximization algorithm

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recommendations! Published in 2024 at "International Journal of Robust and Nonlinear Control"

DOI: 10.1002/rnc.7416

Abstract: The article presents an innovative approach to simultaneously estimate states and unknown inputs (UIs) in nonlinear systems using a particle filter (PF) based recursive expectation‐maximization (EM) algorithm. This method is distinct from traditional iterative EM… read more here.

Keywords: nonlinear systems; based recursive; particle filter; algorithm ... See more keywords

Estimating unbounded unknown inputs in nonlinear systems

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recommendations! Published in 2019 at "Automatica"

DOI: 10.1016/j.automatica.2019.02.050

Abstract: Abstract Unknown inputs such as attacks on safety-critical systems is a major concern in the design of modern engineering systems. If the underlying system to be protected exhibits nonlinear dynamics, few observers/estimators in the current… read more here.

Keywords: unbounded unknown; inputs nonlinear; estimating unbounded; completely unknown ... See more keywords

Estimation with unknown inputs and uncertainties for sampled-data systems based on quasi sliding mode

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recommendations! Published in 2020 at "International Journal of Control"

DOI: 10.1080/00207179.2020.1750706

Abstract: In this work, we consider the problem of simultaneously estimating the system states and unknown inputs in a linear sampled-data system, whose dynamics is influenced by external disturbances and uncertainties. Hardware limitations prevent an estimation… read more here.

Keywords: sliding mode; estimation; system; sampled data ... See more keywords
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Functional Observers for Descriptor Systems With Unknown Inputs

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recommendations! Published in 2023 at "IEEE Access"

DOI: 10.1109/access.2023.3249099

Abstract: This paper addresses the problem of estimating a functional vector for a class of linear time-invariant descriptor systems with unknown inputs. The unknown inputs are considered in both the system dynamics and measurement equations. The… read more here.

Keywords: systems unknown; descriptor systems; unknown inputs; functional observers ... See more keywords

Information Fusion Filtering Scheme for Multisensor Systems With Dual-Unknown Inputs

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recommendations! Published in 2025 at "IEEE Sensors Journal"

DOI: 10.1109/jsen.2025.3577615

Abstract: An estimating technique for multisensor systems with dual-unknown inputs is presented in this work. The approach separates the estimate procedures of system states and unknown inputs, carrying out state estimation and estimation of the dual-unknown… read more here.

Keywords: systems dual; dual unknown; unknown inputs; information fusion ... See more keywords
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Finite-Time State-Observer for a Class of Linear Time-Varying Systems with Unknown Inputs

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recommendations! Published in 2021 at "IEEE Transactions on Automatic Control"

DOI: 10.1109/tac.2021.3096863

Abstract: A finite-time observer for a class of linear time-varying systems with bounded unknown inputs is presented in this note. The design of the observer exploits structural properties of the system and, through a linear operator,… read more here.

Keywords: finite time; linear time; time; observer class ... See more keywords

Dynamic Nonlinear Indoor Environment Thermal State Estimation With Unknown Inputs Using PSO Guided Regularizer Based Adaptive EKF

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recommendations! Published in 2025 at "IEEE Transactions on Automation Science and Engineering"

DOI: 10.1109/tase.2024.3354930

Abstract: The present paper shows how the dynamic indoor temperature profile of an HVAC (Heating, Ventilation, and Air Conditioning) system in a building can be developed using Kalman filters, in presence of unknown inputs. An RC… read more here.

Keywords: unknown inputs; state; state estimation; indoor environment ... See more keywords

Time-Varying Unknown Input Constrained UKF With Unbiased Minimum Variance Estimator for Nonlinear Dynamic Indoor Thermal Profile Estimation

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recommendations! Published in 2025 at "IEEE Transactions on Instrumentation and Measurement"

DOI: 10.1109/tim.2025.3606059

Abstract: Estimating unknown inputs in indoor heating, ventilation, and air conditioning (HVac) systems, particularly under the influence of diverse environmental constraints and time-varying relative humidity, presents a significant challenge. A viable solution is to use a… read more here.

Keywords: time; unbiased minimum; estimation; unknown inputs ... See more keywords

Finite-Time Secure Dynamic State Estimation for Cyber–Physical Systems Under Unknown Inputs and Sensor Attacks

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recommendations! Published in 2022 at "IEEE Transactions on Systems, Man, and Cybernetics: Systems"

DOI: 10.1109/tsmc.2021.3106228

Abstract: In this article, an efficient method for finite-time secure dynamic state estimation in cyber–physical systems (CPSs) subjected to unknown inputs and cyber-attacks is proposed. The proposed approach is based on a set of local finite-time… read more here.

Keywords: time; finite time; state estimation; unknown inputs ... See more keywords

Unknown Inputs Nonlinear Observer for an Activated Sludge Process

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recommendations! Published in 2018 at "Mathematical Problems in Engineering"

DOI: 10.1155/2018/1382914

Abstract: This paper deals with the jointly estimation problem of unknown inputs and nonmeasured states of one altering aerated activated sludge process (ASP). In order to provide accurate and economic concentration measures during aerobic and anoxic… read more here.

Keywords: sludge process; process; activated sludge; unknown inputs ... See more keywords

A Kalman Filter with Intermittent Observations and Reconstruction of Data Losses

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recommendations! Published in 2022 at "International Journal of Applied Mathematics and Computer Science"

DOI: 10.34768/amcs-2022-0018

Abstract: Abstract This paper deals with the problem of joint state and unknown input estimation for stochastic discrete-time linear systems subject to intermittent unknown inputs on measurements. A Kalman filter approach is proposed for state prediction… read more here.

Keywords: state; filter intermittent; kalman filter; unknown inputs ... See more keywords