A new guidance, steering, and control concept is described and evaluated for the Third Phase of an asymmetrical configuration of the Advanced Launch System (ALS). The study also includes the consideration of trajectory shaping issues and trajectory design as well as the development of angular rate, angular acceleration, angle of attack, and dynamic pressure estimators. The Third Phase guidance, steering and control system is based on controlling the acceleration-direction of the vehicle after an initial launch maneuver. Unlike traditional concepts, the alignment of the estimated and commanded acceleration-directions is unimpaired by an add-on load relief. Instead, the acceleration-direction steering-control system features a control override that limits the product of estimated dynamic pressure and estimated angle of attack. When this product is not being limited, control is based exclusively on the commanded acceleration-direction without load relief. During limiting, control is based on nulling the error between the limited angle of attack and the estimated angle of attack. This limiting feature provides full freedom to the acceleration-direction steering and control to shape the trajectory within the limit, and also gives full priority to the limiting of angle of attack when necessary. The flight software concepts were analyzed on the basis of their effects on pitch plane motion.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Guidance, steering, load relief and control of an asymmetric launch vehicle


    Contributors:

    Publication date :

    1989-08-01


    Type of media :

    Theses


    Type of material :

    No indication


    Language :

    English




    Load Relief Control of H-IIA Launch Vehicle

    Suzuki, H. / International Federation of Automatic Control | British Library Conference Proceedings | 2004


    A MODERN LOAD RELIEF GUIDANCE SCHEME FOR SPACE LAUNCH VEHICLES

    Orr, Jeb S. / Russell, Colter W. | Springer Verlag | 2024


    Load relief control of launch vehicle using aerodynamic angle estimation

    Oh, Gyeongtaek / Park, Jongho / Park, Jeongha et al. | SAGE Publications | 2018



    Control Enhanced and Parameterized Load Relief Technology for a Launch Vehicle

    Yang, Eiqi / Tang, Shuo / Xu, Zhi | British Library Conference Proceedings | 2015