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 SpaceDesign Space

Circuit Cards

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

QuestionsQuestions

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