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Thesis - Leigh Moody.pdf - Bad Request - Cranfield University

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Chapter 3 / Sensors / Barometric Altimeter<br />

_ _<br />

When active, if any of these limitations are violated, measurement<br />

transmission is suspended and bit 13 in the measurement ready flag<br />

MS_MSRY1 is cleared. Failure to provide a measurement at the user’s<br />

request is indicated by setting bit 0 of MS_BA_VF. If the height, or height<br />

rate, limits of 500 m and 600 m/s are exceeded bits 1-2 of MS_BA_VF are<br />

set respectively.<br />

3.6.5 Output Interface<br />

The measured barometric (pressure) height passes through an unsigned<br />

16 bit digital interface at a frequency (BAfO) of 20 Hz (clock 17). The<br />

measurement is subject to an interface range limit of 500 m and a one-cycle<br />

transmission delay.<br />

BA<br />

~<br />

P<br />

ZG<br />

d,<br />

m<br />

: =<br />

IF<br />

ϕ<br />

TD<br />

IF IF IF<br />

ZG<br />

( ( ( ( P ) ) ) ) ~<br />

ϕ ϕ ϕ<br />

Q<br />

3.6-3<br />

LIM<br />

ZOH<br />

d,<br />

m<br />

Equation 3.6-5

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