Certain experiments contemplated for space platforms must be isolated from the accelerations of the platforms. An optimal active control is developed for microgravity vibration isolation, using constant state feedback gains (identical to those obtained from the Linear Quadratic Regulator (LQR) approach) along with constant feedforward (preview) gains. The quadratic cost function for this control algorithm effectively weights external accelerations of the platform disturbances by a factor proportional to (1/omega) (exp 4). Low frequency accelerations (less than 50 Hz) are attenuated by greater than two orders of magnitude. The control relies on the absolute position and velocity feedback of the experiment and the absolute position and velocity feedforward of the platform, and generally derives the stability robustness characteristics quaranteed by the LQR approach to optimality. The method as derived is extendable to the case in which only the relative positions and velocities and the absolute accelerations of the experiment and space platform are available.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Optimal microgravity vibration isolation - An algebraic introduction


    Contributors:

    Published in:

    Publication date :

    1992-06-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    Microgravity Vibration Isolation Mount

    Tryggvason, Bjarni V. / Parker, N. / Salcudean, S.E. et al. | SAE Technical Papers | 1994


    Vibration Isolation in Microgravity Environments

    Ortiz, Daniel Carralero / Sánchez, Alfredo M. Antón / Belloso, Jorge Gutiérrez et al. | AIAA | 2004


    Microgravity Payload Vibration Isolation System Development

    Edberg, D. L. / Bastin, P. H. | SAE Technical Papers | 1994


    Control issues of microgravity vibration isolation

    Knospe, C. R. / Hampton, R. D. / Allaire, P. E. | NTRS | 1991