Provided is a robust Hinf
spacecraft pointing control method and
system based on
feature structure configuration. A controller designed by the
feature structure configuration method can provide complete parameterization representation of all control laws with desired characteristics or structures for the
control system, and then a reasonable constraint condition is designed according to the characteristics of a
spacecraft to select free parameters in the control laws. According to the method disclosed by the invention, the
satellite robust Hinf high-precision pointing control design is carriedout by mainly taking the
feature structure configuration method, according to the designed closed-
loop control system result, the feature value of the reasonable closed-loop
system is determined andis adjusted according to the normalized structure of an existing
satellite controller, the main feature value of the on-
satellite closed-
loop control system is consistent to that of the invention, sothat the closed-looped system has the similar motion characteristics. The in-
orbit verification of the
spacecraft with uncertain large-flexible structures shows that the convergence and robust stability are high, and the high-precision pointing
task demand in the long-term on-
orbit operation can be guaranteed, thus the reliability of the system is improved.