Research ArticleOn spacecraft maneuvers control subject to propellant engine modes

- The hybrid three-axis attitude control strategy is organized with a focus on engine modes.
- Engine on mode is related to the small angle maneuvers, while engine off mode is related to the large angle maneuvers.
- The angular rotations are dealt with through a new QBCL strategy and these ones are also dealt with through an OPIDH strategy.
- The control strategy is realized through both the inner and the outer closed loops.
- Two sets of thrusters are dealt with in engine on-off modes.

The paper attempts to address a new control approach to spacecraft maneuvers based upon the modes of propellant engine. A realization of control strategy is now presented in engine on mode (high thrusts as well as further low thrusts), which is related to small angle maneuvers and engine off mode (specified low thrusts), which is also related to large angle maneuvers. There is currently a coarse-fine tuning in engine on mode. It is shown that the process of handling the angular velocities are finalized via rate feedback system in engine modes, where the angular rotations are controlled through quaternion based control (QBCL)strategy in engine off mode and these ones are also controlled through an optimum PID (OPIDH) strategy in engine on mode.