Two-DOF precision platform for spacecraft thrust vector control: control strategies and simulations

Kougen Ma; Mehrdad N. Ghasemi-Nejhad

doi:10.1117/12.539392

26 July 2004 Two-DOF precision platform for spacecraft thrust vector control: control strategies and simulations

Proceedings Volume 5390, Smart Structures and Materials 2004: Smart Structures and Integrated Systems; (2004) https://doi.org/10.1117/12.539392
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

Abstract

This paper presents control strategies and simulations of a two-DOF precision platform as an adaptive thruster mount structure with precision positioning and active vibration suppression capabilities for thrust vector control of space satellites. First, the configuration of the two-DOF precision platform is introduced, which is an intelligent tripod with two in-plane rotational degrees of freedom for the top device-plate. Precision positioning of this platform is achieved using active members that extend or contract to tilt the top device-plate where the thruster is mounted. Kinematic analysis of the platform is then presented and followed by two control strategies; namely local control strategy and global control strategy. In the local control strategy, the motion of each active member is controlled locally according to the kinematical feature of the platform and the local sensor information to achieve the desired tilt of the top device-plate. In the global control strategy, the motion of each active member is adjusted according to the system level information from a tilt sensor. Fuzzy logic control is employed and the two control strategies are simulated and compared.

Citation Download Citation

Kougen Ma and Mehrdad N. Ghasemi-Nejhad "Two-DOF precision platform for spacecraft thrust vector control: control strategies and simulations", Proc. SPIE 5390, Smart Structures and Materials 2004: Smart Structures and Integrated Systems, (26 July 2004); https://doi.org/10.1117/12.539392

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