Adjunct Missile Seeker Deployment Mechanism Concept Review University of Arizona Raytheon Missile Systems

Team 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

Outline Problem Statement Customer Needs Design Constraints Design Ideas Concept Selection Plan of Action

Problem 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 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 II Use an existing IR Seeker Minimize System Weight and Volume Survive Thermal Environment –Storage –Flight Rapid Deployment

Design Space Circuit Cards

Design Constraints

Design Components Deployment method –Must meet deployment time restrictions Seeker orientation –Target must be visible until impact Door mechanism –Affects previous design characteristics

Deployment Mechanism pivots at back of seeker slides into cavity directional hooks scissor drive lateral slide drive track system lateral pivot arm ramp spring

Seeker 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 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 Selection ConceptProsCons 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? Note: This is only an example of the Selection Process

Concept 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 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 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 Action Next two weeks –Flesh out design details –Trade analysis –Identify risks Next two months –Design analysis –Finalize design

Summary Evaluated our customer’s needs Presented rough ideas Eliminated ideas based on customer needs Came up with our preliminary designs

Questions ?