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   Articles with "unknown input" as a keyword



Interval estimation for discrete‐time linear systems based on unknown input observer and reachability analysis

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recommendations! Published in 2025 at "Asian Journal of Control"

DOI: 10.1002/asjc.3694

Abstract: This paper presents an interval estimation method for discrete‐time linear systems with disturbance and measurement noise. First, comparing the existing results, an unknown input observer (UIO) with fewer conservative conditions is designed to estimate the… read more here.

Keywords: linear systems; discrete time; interval estimation; time linear ... See more keywords

Attitude Estimation on SO(3) With Unknown Input

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recommendations! Published in 2025 at "International Journal of Robust and Nonlinear Control"

DOI: 10.1002/rnc.70060

Abstract: State estimation in the presence of unknown input presents a significant challenge in many domains. Few works in the literature have addressed this problem when the state belongs to the special orthogonal group SO(3), which… read more here.

Keywords: attitude estimation; estimation; state; unknown input ... See more keywords

Integrated Fault Estimation and Fault‐Tolerant Control for Switched Stochastic Systems With Unknown Input

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

DOI: 10.1002/rnc.7726

Abstract: In this paper, fault estimation (FE) and fault‐tolerant control (FTC) are studied for switched stochastic nonlinear systems with unknown input and faults. The dynamic unknown input observer (DUIO) and disturbance observer are designed, and the… read more here.

Keywords: control; fault estimation; unknown input; fault ... See more keywords

Nonlinear adaptive tracking control of non-minimum phase hypersonic flight vehicles with unknown input nonlinearity

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recommendations! Published in 2017 at "Nonlinear Dynamics"

DOI: 10.1007/s11071-017-3716-6

Abstract: A nonlinear adaptive controller design method for output tracking of hypersonic flight vehicles (HFVs) subject to input nonlinearity is proposed in this paper. The parameters of the input nonlinearity are assumed to be unknown. This… read more here.

Keywords: unknown input; nonlinear adaptive; nonlinearity; control ... See more keywords

State and unknown input estimation of an anaerobic digestion reactor with experimental validation

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recommendations! Published in 2019 at "Control Engineering Practice"

DOI: 10.1016/j.conengprac.2019.02.003

Abstract: Abstract This paper investigates state and unknown input estimations in an Anaerobic Digestion Reactor (ADR) considering a simple two-stage reaction model describing acidogenesis and methanogenesis. From the sole methane outlet flow, this model allows to… read more here.

Keywords: anaerobic digestion; input; unknown input; digestion reactor ... See more keywords

Sensorless effective wind speed estimation method based on unknown input disturbance observer and extreme learning machine

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recommendations! Published in 2019 at "Energy"

DOI: 10.1016/j.energy.2019.07.120

Abstract: Abstract Precise estimation of effective wind speed plays an important role in the advanced controls aiming at maximizing wind power extraction and reducing loads on turbine components. This paper proposes a sensorless effective wind speed… read more here.

Keywords: speed; unknown input; effective wind; wind ... See more keywords

Active Vibration Control Based on Static Anti-windup Compensator and Unknown Input Observation

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recommendations! Published in 2017 at "IFAC-PapersOnLine"

DOI: 10.1016/j.ifacol.2017.08.2249

Abstract: Abstract In this paper, the windup problem is addressed for disturbance rejection control (DRC) based on an unknown input observer (UIO). The proposed combination aims at dealing with actuator input nonlinearities in active vibration control… read more here.

Keywords: active vibration; observation; unknown input; vibration control ... See more keywords

Data fusion based multi-rate Kalman filtering with unknown input for on-line estimation of dynamic displacements

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recommendations! Published in 2019 at "Measurement"

DOI: 10.1016/j.measurement.2018.08.057

Abstract: Abstract Structural dynamic displacement is one of the most important measurands that describe the dynamic characteristics of a structure. However, accurate measurement of dynamic displacements of a civil infrastructure is still a challenging task. To… read more here.

Keywords: unknown input; dynamic displacement; rate; multi rate ... See more keywords

Path-guided time-varying formation control with collision avoidance and connectivity preservation of under-actuated autonomous surface vehicles subject to unknown input gains

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recommendations! Published in 2019 at "Ocean Engineering"

DOI: 10.1016/j.oceaneng.2019.106501

Abstract: Abstract This paper investigates the distributed time-varying formation control for a swarm of under-actuated autonomous surface vehicles subject to unknown input gains, in addition to model uncertainties and ocean disturbances. The fleet is required to… read more here.

Keywords: time varying; control; varying formation; unknown input ... See more keywords

Adaptive distributed unknown input observers for interconnected linear descriptor systems

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recommendations! Published in 2017 at "International Journal of Systems Science"

DOI: 10.1080/00207721.2016.1173264

Abstract: ABSTRACT We propose an adaptive distributed algorithm for distributed observers of linear time-invariant descriptor systems. In the proposed algorithm, the interconnection gains of the resulting distributed unknown input observers are adjusted adaptively and the adaptation… read more here.

Keywords: unknown input; input observers; adaptive distributed; distributed unknown ... See more keywords

Robust Adaptive Backstepping Control of Quadrotors With Unknown Input Gains

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recommendations! Published in 2023 at "IEEE Access"

DOI: 10.1109/access.2023.3263528

Abstract: Robust adaptive tracking control design for quadrotors with unknown parameters, including the thrust and the drag factors, is presented. Firstly, the adaptive linearizing control approach is employed for conquering the issues of unknown input gains… read more here.

Keywords: control; robust adaptive; quadrotors unknown; unknown input ... See more keywords