U.S. Air Force: The Missile Knows Where It Is

Overview

• The transcript is from a U.S. Air Force training video, explaining how a missile navigation system works.

Key Concepts

Missile Navigation Principles

• Knowledge of Position:

  • A missile knows its location by knowing where it isn't.
  • It calculates its position by determining the difference between where it should be and where it is not.

• Deviation and Correction:

  • The missile computes a deviation or error, which is the difference between the current position and the desired position.
  • The guidance system uses this deviation to generate corrective commands.

Corrective Process

• Movement to Desired Position:

  • Commands are generated to move the missile from its current position to the desired position.
  • Upon reaching the new position, the previously incorrect position no longer applies.

• Continuous Adjustment:

  • The missile continuously evaluates its position, determining where it was and where it should be next.
  • Adjustments are made by evaluating deviations and variations.

Error Handling

• Error Correction:

  • Variations between the current and previous positions are measured.
  • Corrective measures are taken if these variations are significant.

• Understanding of Errors:

  • Errors are assessed by subtracting the position where the missile should not be from where it should be.

Conclusion

• This process ensures that the missile remains on course by consistently adjusting its path based on deviations and errors, ensuring precise targeting.