adjunct missile seeker deployment mechanism concept review university of arizona raytheon missile...
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Adjunct Missile Seeker Adjunct Missile Seeker Deployment MechanismDeployment Mechanism
Concept Review
University of ArizonaRaytheon Missile Systems
Team MembersTeam Members• Thomas Jefferson
– Material Sciences• Ryan Moore
– Mechanical Engineering• Philip Pierson
– Optical Sciences• Scott Nielsen
– Optical Sciences• Karl Heiman
– Aerospace Engineering• David Kraemer
– Electrical Engineering
OutlineOutline
• Problem Statement
• Customer Needs
• Design Constraints
• Design Ideas
• Concept Selection
• Plan of Action
Problem StatementProblem Statement• Design an Adjunct Seeker Deployment
Mechanism (ASDM) that will deploy an Infrared (IR) seeker in the final stages of missile flight.
• Mechanism must:– Minimize changes to existing airframe– Minimize the drag on the missile– Maximize the field of regard (FOR) of the
seeker
Customer Needs ICustomer Needs I• Mitigate new threats • Utilize existing components
– Optimized for different system
• Minimize changes to proven systems– Autopilot– Airframe
• Identify trades and risks of proposed design
• Implement a reliable design
Customer Needs IICustomer Needs II• Use an existing IR Seeker
• Minimize System Weight and Volume
• Survive Thermal Environment– Storage– Flight
• Rapid Deployment
Design ConstraintsDesign Constraints
Design ComponentsDesign Components
• Deployment method– Must meet deployment time restrictions
• Seeker orientation– Target must be visible until impact
• Door mechanism– Affects previous design characteristics
Deployment MechanismDeployment Mechanism• pivots at back of seeker
• slides into cavity
• directional hooks
• scissor drive
• lateral slide drive track system
• lateral pivot arm
• ramp
• spring
Seeker OrientationSeeker Orientation• angled to maximize to FOR
• sits inside of enlarged nosecone
• Normal to missile circuit cards
• seeker sits inside and looks at a prism
• nosecone / teardrop
• external to maximize FOR
• fixed seeker to series of mirrors
• lateral to longitudinal axis
• angled to longitudinal axis
Door MechanismDoor Mechanism• explodes
• angles up w/ a foldable seal
• domed cover that stores within missile depression
• split door slides to sides
• single door slides to side
• single door slides to back
• shaped door to facilitate tear drop
• material that shatters with voltage or force
• shot gun closure
• slowly introduce into airstream to reduce shock
• push up protective dome
• bottom seal gasket
Concept SelectionConcept SelectionConcept Pros Cons
angled to maximize to FOR -Maximizes use of FOR -Does maximum FOR allow best Aero profile?
sits inside of enlarged nosecone -Maximizes use of FOR -Mechanical shocks from nosecone?-Interfere with RF Patterns.-Change to current design autopilot to compensate.
Normal to missile circuit cards -Minimal use of overall volume-Low motion, low deployment time
-2 of 3 seekers potentially useless-Does not maximize FOR w/o additional movement
seeker sits inside and looks at a prism -less shock to seeker -Difficult to maximize FOR?
Ryan Karl Thomas Scott Phil Dave Totalangled to maximize to FOR 1 1 1 1 1 0 5sits inside of enlarged nosecone -1 -1 -1 -1 -1 0 -5Normal to missile cerkit cards 0 -1 0 0 -1 0 -2seeker sits inside and looks at a prism 0 -1 0 0 0 0 -1nosecone / teardrop -1 -1 0 1 0 0 -1external to maximize FOR 1 0 0 -1 0 0 0fixed seeker to series of mirrors 0 0 -1 -1 1 0 -1lateral to longitudinal axis 0 -1 1 1 0 0 1angled to longitudinal axis 0 0 1 1 0 0 2
Seeker Orientation
Note: This is only an example of the Selection Process
Concept Selection IConcept Selection I
Slide Rail System
Pros• One direction of
Movement• Indexed Direction
Cons• Lubrication
required
Slide Drive Track System
IR Seeker
Circuit Card Space
Missile Cross-section
Utilizes: Slide Drive System, Any Seeker, maximum length available
Concept Selection IIConcept Selection II
Torsional Spring?
Pivot Arm
Missile Cross-section
IR Seeker
Circuit Card Space
Utilizes: Pivot Arm, Any Seeker, Few moving parts
Pivot Arm
Pros• Single Motion• Easy to Implement
Cons• Large Deceleration• Large torque for
movement
Concept Selection IIIConcept Selection III
IR Seeker
Missile Cross-section
Circuit Card Space
Pivot Axis
Door Cut-out
Utilizes: Seeker Rotation, Any Seeker, Few moving parts
Seeker Rotation
Pros• Simple control of
movement
Cons• Volume for
motion
• Torsional force required
Plan of ActionPlan of Action
• Next two weeks– Flesh out design details– Trade analysis– Identify risks
• Next two months– Design analysis– Finalize design
SummarySummary
• Evaluated our customer’s needs
• Presented rough ideas
• Eliminated ideas based on customer needs
• Came up with our preliminary designs