Calculating velocities to be gained in positioning

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Homework Help Overview

The discussion revolves around calculating the velocities required for a target delivery system to accurately strike a stationary land target. The context involves a mobile platform at sea and considers various corrections such as roll, pitch, heading, and environmental factors like air density and wind direction.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants are exploring the need for a specific formula to calculate requisite velocities, with some questioning whether differential equations are necessary or if a direct equation suffices. Others express uncertainty about the clarity of the problem and the potential complexity of the required equations.

Discussion Status

The discussion is ongoing, with participants seeking clarification on the problem's requirements and the nature of the equation needed. Some guidance has been offered regarding the potential complexity of the calculations, but no consensus has been reached on the exact formulation needed.

Contextual Notes

Participants note the need for additional background information to better understand the problem, including whether it pertains to a project or an exam question. There is also mention of multiple reference planes involved in the calculations.

beansbaxter
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Problem:
I am looking for a formula necessary to caculate velocities to be gained in positioning a target delivery system at a target point prior to reentry vehicle delivery. The delivery system will be launched from a mobile platform at sea. The corrections that need to be considered and included are:

-roll
-pitch
-heading
-deflection correction of launch platform in x,y & z axis
-correction of delivery system misalignment with reference to launch platform
-local gravity
-earth rotational speed

The formula is necessary to calculate the requisite velocities needed to strike a stationary land target with a ballistic object released from a delivery system. It will be assumed that the delivery system will be at 0 vbg (Velocities to Be Gained).

The only corrections to be considered are:
-air density
-wind direction above target

All I can come up with so far is this:
The actual computations go across three different reference planes. There's the launch platform reference plane, which is resolved about the physical frame into what's called the 'computing reference' plane, and that in turn is used to calculate the velocity to be gained values to be used in the delivery system reference plane.
 
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do you need differential equations which you are going to integrate?
or just an answer directly: VBG=...?
 
Just the equation is all I am in desperate need of...
 
sorry, but from your description it is still not clear to me what "THE" equation should be like. I doubt one would start out with only one equation though.
Maybe you could give some more background (is this some project, an exam question) or some more info.
 

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