AS4006 Spacecraft Attitude Dynamics and Control Syllabus:

AS4006 Spacecraft Attitude Dynamics and Control Syllabus – Anna University PG Syllabus Regulation 2021

COURSE OBJECTIVES:

This course will enable students
1. To get introduced with the basics of attitude sensors and its types.
2. To gain knowledge on the basic principles of operation of thrusters.
3. To learn rigid body dynamics and various disturbing forces in space.
4. To gain in-depth knowledge on attitude stabilization schemes & orbit maneuvers.
5. To be familiar with the concepts of operating principles and design of guidance laws.

UNIT I ATTITUDE SENSORS

Relative Attitude sensors – Gyroscopes, Motion reference Units, Absolute Attitude sensors – Horizon sensor, Orbital Gyrocompass, Earth sensors, sun sensors (Digital and analog), star sensor- Magnetometer

UNIT II CONTROL ACTUATORS

Fundamental principles of operation of Thrusters- Momentum Wheel-Control Moment Gyros Reaction wheel- Magnetic Torques- Reaction Jets- Ion Propulsion- Electric propulsion- solar sails

UNIT III ATTITUDE DYNAMICS, ATTITUDE AND ORBITAL DISTURBANCES

Rigid Body Dynamics – Flexible body Dynamics – Slosh Dynamics- disturbing forces due to Drag, Solar radiation Pressure and forces – Disturbances due to Celestial bodies

UNIT IV ATTITUDE STABILIZATION SCHEMES & ORBIT MANEUVERS

Spin, Dual spin – Gravity gradient – Zero momentum system – Momentum Biased system – Reaction control system – Single and Multiple Impulse orbit Adjustment – Hohmann Transfer Station Keeping and fuel Budgeting

UNIT V MISSILE AND LAUNCH VEHICLE GUIDANCE

Operating principles and design of guidance laws – homing guidance laws- short range – Medium range and BVR missiles – Launch Vehicle- Introduction – Mission requirements- Implicit guidance schemes – Explicit guidance – Q guidance schemes

TOTAL: 45 PERIODS

COURSE OUTCOMES:

Upon completion of this course, students will be able to
CO1: Get basic idea on the working principles of attitude sensors and its applications.
CO2: Familiarize with control actuators used for satellite applications.
CO3: Comprehend the application of rocket vehicle guidance laws.
CO4: Demonstrate satellite orbit stabilization schemes and methods of satellite orbit transfer.
CO5: Familiarize with orbit manoeuvres of satellites and rocket vehicle guidance.

REFERENCES:

1. Blake Lock, J.H Automatic control of Aircraft and missiles, John Wiley Sons, New York, 1990.
2. James R Wertz, Spacecraft Attitude Determination and control, Reidel Publications.2001.
3. Kaplan M, Modern Spacecraft Dynamics and control, Wiley Press, 1979.
4. Marcel J. Sidi, Spacecraft Dynamics and control, A Practical Engineering Approach, Cambridge University Press.2000.
5. Meyer Rudolph X, Elements of Space Technology for Aerospace Engineers, Academic Press, 1999.
6. Vladimir A Chobotov, Spacecraft Attitude Dynamics and Control (Orbit)”, Krieger Publishing Company Publishers, 1991.