2022
DOI: 10.1049/sil2.12098
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Robust strong tracking unscented Kalman filter for non‐linear systems with unknown inputs

Abstract: This paper proposes a state estimation approach ‘robust strong tracking unscented Kalman filter with unknown inputs’ that can be applied to non‐linear systems with unknown inputs. Specifically, the non‐linear state and measurement equations are linearised by statistical linearisation. Then, the estimation equation of the unknown input is derived based on the weighted least squares method. The multiple suboptimal fading factor is introduced into a priori error covariance matrix to improve the tracking ability f… Show more

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Cited by 9 publications
(5 citation statements)
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“…In the actual filtering process, the covariance Ck is calculated in Equation (23). In addition, according to [30], after weighing the robustness of the algorithm and the response speed to NGN, the forgetting factor λ is taken as 0.95.…”
Section: Dynamic Self-tuning Algorithmmentioning
confidence: 99%
See 1 more Smart Citation
“…In the actual filtering process, the covariance Ck is calculated in Equation (23). In addition, according to [30], after weighing the robustness of the algorithm and the response speed to NGN, the forgetting factor λ is taken as 0.95.…”
Section: Dynamic Self-tuning Algorithmmentioning
confidence: 99%
“…However, because H k is not necessarily reversible, the value of Pk|k−1 cannot be directly calculated by Equation (28). Therefore, the expansion coefficient α k is introduced to adjust Pk|k−1 , as shown in Equations ( 29) and (30):…”
Section: Dynamic Self-tuning Algorithmmentioning
confidence: 99%
“…Nevertheless, multiple iterations can lead to increased covariance of weight and particle degeneracy with local optimization. The UKF employs a scaled unscented transformation process and deterministic sampling technique to approximate the posteriori probability density with higher precision [8,9]. However, the artificial selection of parameters may impact the filtering performance.…”
Section: Introductionmentioning
confidence: 99%
“…Pan et al proposed an adaptive fading factor to address the uncertainty of process noise. Liu et al introduced fading factors in the error covariance matrix and constructed various ST nonlinear filters (Kiani and Ahmadvand, 2022; Liu et al, 2022). ST filters have also been applied to spacecraft attitude estimation (Huang et al, 2016) and maneuvering target tracking (Ge et al, 2011; Li et al, 2014).…”
Section: Introductionmentioning
confidence: 99%