Design of efficient thrust management algorithm for variable thrust solid propulsion system with multi-nozzles다중 노즐 가변 추력 고체 추진 시스템의 추력 관리기법 설계

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dc.contributor.advisorBang, Hyochoong-
dc.contributor.authorLee, Hosung-
dc.description학위논문(박사) - 한국과학기술원 : 항공우주공학과, 2020.8,[vi, 77 p. :]-
dc.description.abstractIn this dissertation, a thrust management algorithm that integrates combustion chamber pressure control and thrust distribution is proposed for a Variable Thrust Solid Propulsion System (VTSPS) with multiple nozzles. A Divert and Attitude Control System (DACS) installed with pintle thrusters that can continuously and linearly change the thrust by varying the nozzle throat area with pintle actuators, which is a kind of VTSPS, is considered in this dissertation. The multiple pintle thrusters sharing the combustion chamber has to control the combustion chamber pressure and simultaneously produce the thrust required by the vehicle. A nonlinear combustion chamber pressure controller with application of nonlinear disturbance observers is proposed in order to consider the chamber pressure dynamics, actuator, nozzle geometry, model uncertainty, and disturbances. Also, a thrust distribution algorithm that can efficiently allocate thrust commands to each thruster based on the pressure control is proposed. Finally, a numerical simulation is conducted to verify the performance of the proposed thrust management algorithm. The proposed chamber pressure controller can reduce the fluctuation of chamber pressure due to nonlinearities, uncertainties and disturbances of the system and can minimize the structure mass of VTSPS related with chamber pressure. Furthermore, the proposed thrust distribution algorithm can minimize the consumed power of the actuation system for pintle thrusters and can reduce the mass of the actuation system.-
dc.subjectVariable Thrust Solid Propulsion System (VTSPS)▼athrust management algorithm▼acombustion chamber pressure control▼athrust distribution▼apintle thrusters▼aactuator▼anozzle▼anonlinear disturbance observer▼aDivert and Attitude Control System (DACS)-
dc.subject가변 추력 고체 추진 시스템▼a추력 관리 기법▼a연소실 압력제어▼a추력 분배▼a가변 노즐 추력기▼a구동기▼a노즐▼a비선형 외란 관측기▼a위치 자세 제어 시스템-
dc.titleDesign of efficient thrust management algorithm for variable thrust solid propulsion system with multi-nozzles-
dc.title.alternative다중 노즐 가변 추력 고체 추진 시스템의 추력 관리기법 설계-
dc.description.department한국과학기술원 :항공우주공학과,-
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