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- W2121569122 abstract "A new optimal control approach, D θ - technique, is employed to control the position and attitude of a spacecraft accurately in order to capture and remove large space targets. Spacecraft s are required to be able to perform large position and angle maneuvers; their dynamics are highly nonlinear. To control this highly nonlinear dynamic system, we formulate it as a nonlinear optimal regulator problem. The proposed D θ - technique can give an approximately closedform suboptimal controller in the sense that it obtains an approximate solution to the Hamilton-JacobiBellman (HJB) equation through a perturbation method. By adjusting perturbation terms, asymptotic stability can be achieved in the large and the system transient performance can also be tuned in a flexible way. Compared with the popular SDRE technique, this approach does not need on-line computations of algebraic Riccati equation. With high dimensioned systems, this feature presents a tremendous implementation advantage. A six degree of freedom simulation of the spacecraft and target are used to demonstrate the effectiveness of the D θ - controller." @default.
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- W2121569122 date "2004-01-05" @default.
- W2121569122 modified "2023-09-23" @default.
- W2121569122 title "Spacecraft Position and Attitude Control with theta-D Technique" @default.
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- W2121569122 doi "https://doi.org/10.2514/6.2004-540" @default.
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