AMCOM MK66 Project Guidance!

Completed: Meeting with AMCOM staff Meeting with AMCOM staff Objectives updatesObjectives updates Additional design considerationsAdditional design considerations Missile sometimes returns to helicopter… Missile sometimes returns to helicopter… Abort procedure Abort procedure Completed initial course plotting component Completed initial course plotting component

Course plotting Statically allocate an array with XYZ position element structures. Statically allocate an array with XYZ position element structures. Array size determined statically by maxpts ~4096 elements (to be revised) Array size determined statically by maxpts ~4096 elements (to be revised) Array points predefined – guidance computer compares YZ coordinates with X coordinate line-of-flight index Array points predefined – guidance computer compares YZ coordinates with X coordinate line-of-flight index

X-axis indexing …… X-axis is line of flight X/Y/Z structural elements Discrete coordinate points i Course “target” points referenced/indexed by missile progress along x-axis

3D plot from algorithm Z Y X Alt (ft) Deviation (L/R)Distance

Thermal Battery

Matlab Simulation Update Still cannot locate last year’s simulation files Still cannot locate last year’s simulation files Recreated the files with Blockset Recreated the files with Blockset Files will be updated to contain newer information as project progresses Files will be updated to contain newer information as project progresses Need to update constants, gains, and sub- blocks Need to update constants, gains, and sub- blocks Need to acquire aerodynamic coefficient values (saved in Datcom files) Need to acquire aerodynamic coefficient values (saved in Datcom files)

Outer Shell Construction Configuration Tolerance-fit interfaces for both ends of avionics module: Ease of construction Press-fit shear pins around circumference 15in length

Outer Shell Construction Configuration Male threaded interface: in OD 6 threads/in pitch.5in tolerance-fit shank 1.5in threaded end 7/32in wall thickness Shoulder machined for positive stop

Outer Shell Construction Configuration Female threaded interface: OD 7/32in wall thickness ID machined to match size/pitch of war head.5in tolerance-fit shank Shoulder machined for positive stop

Outer Shell Construction Configuration

Press-fit Flat-vent Pull-out Pins Internally threaded for ease of removal Allows module to be assembled/disassembled multiple times Reusable

CANARD STRESS ANALYSIS Performed force and stress analysis on canards from inertial forces Performed force and stress analysis on canards from inertial forces Determined forces on fully open canards under steady conditions Determined forces on fully open canards under steady conditions max force =38.2 Nmax force =38.2 N Determined impulsive forces on canards during deployment Determined impulsive forces on canards during deployment Max force =99.1 NMax force =99.1 N

CANARD STRESS ANALYSIS assumed.3in dia shaft on canard assumed.3in dia shaft on canard From inertial forces alone, max shear stress = 5MPa From inertial forces alone, max shear stress = 5MPa Ultimate shear stress for titanium is around 500MPa Ultimate shear stress for titanium is around 500MPa

JOBS FOR THE WEEK Determine the aerodynamic forces on canard to add to inertial forces Determine the aerodynamic forces on canard to add to inertial forces Determine places to obtain canards Determine places to obtain canards Spec servo motors: reaction times, torques Spec servo motors: reaction times, torques Find material for shell and interfi Find material for shell and interfi Contact McMaster about interference fittings Contact McMaster about interference fittings Update CAD Drawings Update CAD Drawings Price materials Price materials

AMCOM MEETING OK to proceed with construction OK to proceed with construction Umbilical DOES NOT fall off, no harmful effects Umbilical DOES NOT fall off, no harmful effects Obtained orientation information upon deployment Obtained orientation information upon deployment