MAE142_L21_SpaceControl.pdf

MAE142_L21_SpaceControl.pdf - Spacecraft Control Open-Loop...

• 11

This preview shows pages 1–5. Sign up to view the full content.

Spacecraft Control Open-Loop Attitude Maneuvers Closed-Loop Attitude Control Hubble Space Telescope MAE 142 NASA Image: Hubble Space Telescope 1 2 3

This preview has intentionally blurred sections. Sign up to view the full version.

2 MAE 142 Space Shuttle Control System Stone, H.W. and Powell, R.W., "Effect of Aerodynamic and Angle- of-Attack Uncertainties on the Blended Entry Flight Control System of the Space Shuttle from Mach 10 to 2.5", NASA TP-2283, 1984. Restrepo, C. and Valasek, J., "Preliminary Study Using Forward Reaction Control System Jets During Space Shuttle Entry", Paper 2006-6073, AIAA Guidance, Navigation, and Control Conference and Exhibit, 2006
3 MAE 142 SAMPEX State Model x = [ 1 2 3 r N 1 N 2 N 3 ] Angular rate about 1-axis [rad/s] Angular rate about 2-axis [rad/s] Angular rate about 3-axis [rad/s] Reaction wheel angular rate [rad/s] Disturbance torque about 1-axis [N] Disturbance torque about 2-axis [N] Disturbance torque about 3-axis [N] ˙ 1 = I 22 I 33 I 11 2 3 I r I 11 3 r N 1 I 11 ˙ 2 = I 33 I 11 I 22 1 3 N 2 I 22 ˙ 3 = I 11 I 22 I 33 1 2 I r I 33 1 r N 3 I 33 ˙ r = 0 ˙ N 1 = 0 ˙ N 2 = 0 ˙ N 3 = 0 ˙ x t = f [ x t ] I 23 = 0 note (for simplicity):

This preview has intentionally blurred sections. Sign up to view the full version.

4 MAE 142 Open-Loop Attitude Maneuvers Consider a “bang-bang” control law to change the pitch attitude of a spacecraft.
This is the end of the preview. Sign up to access the rest of the document.
• Fall '08
• Aliseda,A
• Hubble Space Telescope

{[ snackBarMessage ]}

What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern