MAE142_Lecture4

MAE142_Lecture4 - Coordinate Frames Reference Frames...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Coordinate Frames Reference Frames Coordinate Conversions WGS-84 Earth Model MAE 142 View of the ISS during Flyaround (NASA Image)
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 MAE 142 Inertial Reference Frame “In every dynamics problem there must be an inertial reference frame, either explicitly defined, or lurking implicitly in the background.” [Etkin, B., Dynamics of Atmospheric Flight, Wiley, 1972]. Newton's laws of motion apply to the inertial reference frame. The inertial reference frame is not accelerating, but may be moving uniformly, relative to distant stars. Spacecraft control problems may use the Earth-Centered Inertial (ECI) frame. X-axis points in direction of the vernal equinox Y-axis is in the equatorial plane Z-axis lies along the Earth's rotational axis In many (low-speed) aircraft dynamics problems, any reference frame fixed to the Earth can be considered an inertial frame.
Background image of page 2
MAE 142 Earth-Centered, Earth-Fixed (ECEF) Frame ECEF has its origin fixed to the center of the Earth. ECEF rotates relative to the inertial frame.
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/18/2012 for the course MAE 142 taught by Professor Aliseda,a during the Spring '08 term at UCSD.

Page1 / 12

MAE142_Lecture4 - Coordinate Frames Reference Frames...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online