학위논문 (석사)-- 서울대학교 대학원 : 기계항공공학부, 2015. 2. 김유단. ; In this thesis, methods to estimate the angle of attack and the sideslip angle of a launch vehicle using GPS/INS navigation data are proposed. Open-loop, closed-loop, and hybrid load-relief control algorithms are designed to reduce an aerodynamic load on the launch vehicle at ascent phase. From dynamics of the launch vehicle, the equations of the angle of attack and sideslip angle are derived. Kalman filter and sliding mode observer are designed to estimate the angle of attack and sideslip angle. Also, extended Kalman filter using the dynamics and kinematics of the launch vehicle is designed. Numerical simulation is conducted to evaluate performance of each estimator. Using the estimated angle of attack and sideslip angle, the closed-loop and hybrid load-relief control algorithms are proposed. A simple angle of attack controller and nonlinear controller are designed as the closed-loop control method. An attitude proportional-derivative controller is chosen as the open-loop load-relief control method for performance comparison. Nonlinear six degree of freedom model is used for Monte Carlo simulation to analyze the load-relief controllers. ; Table of Contents Abstract i Table of Contents ii List of Tables iv List of Figures v Chapter 1. Introduction 1 2. Modeling for Ascent Phase of Launch Vehicle 4 2.1 Kinematics of Launch Vehicle 4 2.2 Dynamics of Launch Vehicle 8 2.2.1 Gravitation 9 2.2.2 Thrust 10 2.2.3 Aerodynamics 11 2.2.4 Newton-Euler Equations 13 2.3 Dynamics of Angle of Attack and Sideslip Angle 15 2.4 Wind 17 3. Estimation of Angle of Attack and Sideslip Angle 19 3.1 Kalman Filter 19 3.1.1 Kalman Filter 20 3.1.2 Extended Kalman Filter 23 3.2 Sliding Mode Observer 29 3.3 Numerical Simulations 32 3.4 Summary 40 4. Load-relief Controller 41 4.1 Open-loop Load-relief Method 41 4.1.1 Trajectory Optimazation 41 4.1.2 Attitude Proportional-Derivative Controller 43 4.2 Closed-loop Load-relief Method 44 4.2.1 Angle of Attack Controller 44 4.2.2 Nonlinear Angle of Attack Controller 45 5. Numerical Simulations 50 5.1 Case Design 50 5.1.1 Gain Scheduling 51 5.1.2 Roll Angle Controller 54 5.2 Results 57 6. Conclusion 70 Bibliography 71 Abstract (Korean) 73 ; Master
Angle of Attack and Sideslip Angle Estimation for Load-relief Control of Launch Vehicle System ; 발사체 시스템의 하중경감 제어를 위한 받음각 및 옆미끄럼각 추정
01.01.2015
Hochschulschrift
Elektronische Ressource
Englisch
DDC: | 629 |
Load relief control of launch vehicle using aerodynamic angle estimation
SAGE Publications | 2018
|Vehicle Sideslip Angle Estimation: A Review
SAE Technical Papers | 2018
|Aircraft angle of attack and sideslip angle indicator
Europäisches Patentamt | 2023
|AIRCRAFT ANGLE OF ATTACK AND SIDESLIP ANGLE INDICATOR
Europäisches Patentamt | 2022
|