Guidance and Control Principles

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Guidance and Control Principles

• Naval Weapons Systems

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Missiles

• Unguided
• No course corrections
• Elevation, ballistics, gravity, etc
• Guided
• Control system
• Change direction

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Three Phases of Guidance
Boost Mid-Course
Terminal
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3 Main Categories of Guidance Control

• 1. Control Guidance
• Command
• Beam rider
• 2. Homing (reacts to target features)
• Active
• Semi-Active
• Passive
• 3. Self Contained Smart Weapon

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Command Guidance
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Beam Rider Control Guidance
Older method of guidance control.
Tracking Beam
Narrow Guidance Beam
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Homing Guidance Control
Reflected Waves
Reflected Waves
Target Characteristic
Radar
Radar
2. Semi-Active
3. Passive
1. Active
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Self-Contained Guidance Systems

• Consists of two parts
• Preset
• Updating

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Self-Contained Guidance Systems

• Preset
• Path is predetermined, inside the weapon

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Self-Contained Guidance Systems

• Updating 3 kinds
• 1. Inertial
• Senses weapons movement and make adjustments.
• 2. Terrestrial
• Compares actual terrain with predicted and
  adjusts.
• 3. GPS

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Homing Logic

• Preset
• Constant
• Programmed
• Variable
• Pursuit
• Constant Bearing
• Proportional Navigation
• Line-of-Sight (being phased out)

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Pursuit PathGood for short ranges
Points the target at all times.
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Constant Bearing PathGood for long range
X
Initial Target Path
Intercept Point
New Path
Constant Bearing Path
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Proportional NavigationWorks for short and long
range
Initial Range
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Line of Sight
Initial Range
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Putting It All Together
Target Reflection
ANTENNA BEAM
LAUNCH CYCLE
BOOST
MIDCOURSE GUIDANCE
TERMINAL GUIDANCE
PRESS LAUNCH
INITIATE ACTIVE MODE
SEPARATE
INITIATE SEMIACTIVE MODE
IMPACT
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