Orbit determination of spacecraft in orbit has been mostly dependent on either GNSS satellite signals or ground station telemetry. Both methods present their limitations, however: can only be used effectively earth orbit, and ground-based presents an inherent latency that increases with the Earth–spacecraft distance. For flying formations, alternative method determination, independent external ...

The observability of radome aberration estimation with line-of-sight (LOS) angle-only measurement is studied in this paper. When missile seeker can only measure LOS angle of target, target state variables are required to be estimated with this measurement for accurate missile guidance. Since LOS angle measurement contains error, caused by radome attached at missile nose and called radome aberra...

In this paper, we deduce general observability condition of all types of SLAM solutions regardless what states they consider directly in estimation, i.e. whether SLAM is feature based or pose (graph) based. This result comes from doing nonlinear observability analysis of the pose-based SLAM. We consider general vehicle motion model whose control inputs are translational and rotational velocity ...

In order to more effectively cope with the real world problems of vagueness, imprecise and subjectivity, fuzzy event systems were proposed recently. In this paper, we investigate the controllability and the observability property of two systems that one of them has fuzzy variables and the other one has fuzzy coefficients and fuzzy variables (fully fuzzy system). Also, sufficient conditions for ...

In this paper, the problem of state observation with exponential error decay for nonlinear systems affine in the input is considered and an observer is proposed. For such an observer, the drift-observability property of the system (i.e., observability for zero input), together with an assumption on the input amplitude or on the observation relative degree, are sufficient conditions for exponent...

In cooperative localization a group of robots exchange relative position measurements from their exteroceptive sensors and their motion information from interoceptive sensors to collectively estimate their position and heading. For the localization errors to be bounded, it is required that the system be observable, independent of the estimation technique being used. In this paper, we develop a ...

This paper analyzes the evolution of conventions in a society with local interaction and mobile players. Three innovative aspects are introduced: Imperfect observability of play outside a player's home location, friction in the strategy adjustment process, and restricted mobility. It is shown that, if mobility is unrestricted, only e cient conventions are stochastichally stable. If there are ba...

The intent of this talk is to propose an alternative way to deal with observability of systems governed by ODEs, in a more general setting than the standard output equation. We show that the starting instants from which the system is observabe correspond to points of single-valuedness of a multifunction I(·), which involves the viability kernel of output domain under the augmented system. The a...

In this paper, we consider the problem of quantifying controllability and observability of a nonlinear discrete time dynamical system. We introduce the Koopman operator as a canonical representation of the system and apply a lifting technique to compute gramians in the space of fullstate observables. We illustrate the properties of these gramians and identify several relationships with canonica...