1

Todays lecture

• Refresh basic mechanics– Angular momentum– Moment of inertia– Torque

• Gyros– Platforms– Strap-down

• Inertial Measurement Units IMU

Material from• Hyperphysics http://

hyperphysics.phy-astr.gsu.edu/• Fraden Chapter 8• Bosch/Sensonor• Advances in Navigation

Sensors and Integration Technology www.rta.nato.int

• Handbook of Virtual Environment Technology

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Dreie impuls

3

Dreie impuls og treghetsmoment

4

(Kraft-) moment

5

Mekaniske gyro prinsipper

dt

Ld

Gyro kompass(Gyro stabilized platform) =0

L

Rate gyro(Strap-down gyro)

Følger ”bilen”Måles

6

Bosch gyro

7

Automotive rate gyro

Sensonor

8

Fiber optisk ring gyro

9

IMU-INS

• Inertial measurement unit (IMU)

• Inertial navigation system (INS)

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Militære anvendelser og krav

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Handbook of Virtual Environment Technology

12

Teknologiske trender (2003)

13

Akselerometere (2003)

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Kostnadsbildet

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Teknologiforventninger (2003)