Journal
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
Volume -, Issue -, Pages -Publisher
AMER INST AERONAUTICS ASTRONAUTICS
DOI: 10.2514/1.G006108
Keywords
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Funding
- Air Force Office of Scientific Research under Dynamic Data-Driven Applications Systems (DDDAS) [FA9550-16-1-0071]
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In applications of state estimation, it is often necessary to restrict the state correction to a specific subspace corresponding to the measurement location. This paper presents the injection-constrained unscented Kalman filter (IC-UKF) and the injection-constrained retrospective cost filter (IC-RCF) to address this problem. The performance of these filters is evaluated numerically, and their accuracy and suboptimality relative to full-state output-error injection are compared.
In applications of state estimation involving data assimilation over a spatial region, it is often convenient, and sometimes necessary, to confine the state correction to a prescribed subspace of the state space that corresponds to the measurement location. This is the injection-constrained state-estimation problem, where the injection of the output error is constrained to a specified subspace of the state space. Unlike full-state output-error injection, which is the dual of static full-state feedback, constrained output-error injection is the dual of static output feedback. To address the injection-constrained state-estimation problem, this paper develops the injection-constrained unscented Kalman filter (IC-UKF) and the injection-constrained retrospective cost filter (IC-RCF). The performance of these filters is evaluated numerically for linear and nonlinear state-estimation problems in order to compare their accuracy and determine their suboptimality relative to full-state output-error injection. As a benchmark test case, IC-UKF and IC-RCF are applied to the viscous Burgers equation for state and parameter estimation.
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