Letter to the Editor Comment on “Highly Efficient Sigma Point Filter for Spacecraft Attitude and Rate Estimation”
نویسندگان
چکیده
In light of the intuition that a better symmetrical structure can further increase the numerical accuracy, the paper by Fan and Zeng 2009 developed a new sigma point construction strategy for the unscented Kalman filter UKF , namely, geometric simplex sigma points GSSP . This comment presents a different perspective from the standpoint of the numerical integration. In this respect, the GSSP constitutes an integration formula of degree 2 with equal weights. Then, we demonstrate that the GSSP can be derived through the orthogonal transformation from the basic points set of degree 2. Moreover, the method presented in this comment can be used to construct more accurate sigma points set for certain dynamic problems.
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Highly Efficient Sigma Point Filter for Spacecraft Attitude and Rate Estimation
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