Swing Combined Attitude Control Scheme for Solid Strap-On Launch Vehicle
A solid strap-on launch vehicle joint swing control scheme is proposed,which is dedicated to handle large range thrust variation and the non-synchronous thrust among solid boosters.Firstly,the com-bustion chamber pressure is used to estimate the real-time thrust of each solid booster,and the controller pa-rameters are accordingly modified on-line due to the thrust variation.Secondly,by adopting the feed-for-ward control to eliminate the loss of thrust synchronism.Finally,the real time swing subsidence angle com-pensation for solid booster is adopted to solve the effect of pivot point excursion.The simulation results show that the proposed adaptive control scheme is able to efficiently solve control matters caused by the thrust un-certainties and the non-synchronization thrust among solid boosters,which takes advantage of increasing the attitude control precision with large scale and improving the launch vehicle's adaptive capability in the real flying environment.
Joint controlNon-synchronous thrustPivot point excursionAdaptive controlSolid strap-on launch vehicle
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