Amcom M445 Fuze Project

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Amcom M445 Fuze Project
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Current M445 fuze

• Electrical arming occurs no sooner than 3.7 sec
  before fuze set time.
• Mechanical arming within 1.0 sec after fuze
  initialization.
• Premature functions
• lt 1/1million prior to mechanical arming.
• lt1/1thousand prior to electrical arming.
• Early functions
• Early fuze function lt 1/1 thousand.

Section left unchanged
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Chipset Power Requirements

• Motorola 68k
• Requires 5V source
• Uses 1.2W at very low frequencies (8Hz)

• Altera Cyclone
• Can be designed to operate at 3.3V, 2.5V, 1.8V,
  1.5V
• .99W, .75W, .54W, .45W respectively
• Assuming current supply of 300 mA

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IMU Power Requirments

• KVH TG-6000
• Can handle 14-30V, max 12W

• Honeywell MIMU
• Requires 100V
• Has the option of 28V-100V converter inclusion
• 32W max, 22W average

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Motorola 68000

• CPU for several game platforms
• Easily programmed in C
• Capable of manipulating up to 4 gigabytes of data
• Intelligent Architecture
• Speeds from 8 to 50 MHz
• Less than10

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Altera Cyclone

• programmable architecture
• digital signal processing (DSP) implementations
• external memory interface
• serial, bus, and network interfaces

http//www.altera.com/products/devices/cyclone/cyc
-index.jsp
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Workings of an IMU

• Gyro Scope
• Records the pitch, roll and yaw
• Accelerometer
• Records the acceleration in 3 dimensions

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How Gyroscope Works
Uses basic Physics principles. Based of Newton's
first law that states an object will stay at a
constant velocity unless acted on by an outside
force.
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How Accelerometers Work
Basic accelerometers use a spring system that
uses the equation MAkDx where Dx is the Delta X.
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IMU Comparison

•   

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Deriving Position from Acceleration Time

• X SoV0t½at2
• V V0at
• Where a received from accelerometer
• Vectoring coordinates
• VxxdotVx,o VyydotVy,o-gt Vz zdotVz,o
• XXoVx,ot YYoVy,ot-.5gt2 ZZoVz,ot

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Calculating Projected Flight

• D ½rV2ACD
• L ½rV2ACD
• FTmdot (Vj-Vo)Accelerationmass (assume
  constant acceleration)

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Things to Accomplish By Next Meeting

• Compare differing GPU/Telemetry Systems
• Compare GPU vs IMU vs GPUIMU
• Use governing equations and set equal state
  (comparison state)
• Understand Datcom and modeling Software
• Other Where is center of mass of missile?