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

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Chapter 3 / Sensors<br />

_ _<br />

Reference Data<br />

Source 1<br />

Reference Data<br />

Source 2<br />

Reference Data<br />

Source "N"<br />

Reference<br />

State vector<br />

3.2-7<br />

Data derived from the<br />

Reference State Vector<br />

Sensor 1<br />

Sensor 2<br />

Sensor "M"<br />

Figure 3-2 : Sensor Interaction with the Reference Environment<br />

§3.2.2 deals with errors that are common to many sensors. These generic<br />

errors are permanently allocated the bits listed in Table 3-6 in each sensor’s<br />

error control word. If a sensor does not use one, or more, of these generic<br />

error models their bits are left unused. Error models unique to a sensor are<br />

then allocated one of the remaining unused bits. If an error control word is<br />

set to zero, its default condition, a sensor provides perfect measurements at<br />

the selected output rate.<br />

Table 3-6 : Sensor Error Model Selection<br />

BIT S BI<br />

E T<br />

N<br />

S<br />

O<br />

R<br />

E<br />

R<br />

R<br />

O<br />

R<br />

SENSOR ERROR<br />

0 U15<br />

N<br />

U<br />

S<br />

E<br />

D<br />

Sensor measurement range limitation<br />

1 L 16<br />

u<br />

m<br />

p<br />

e<br />

d<br />

Sensor measurement rate limitation<br />

t<br />

i<br />

m<br />

e<br />

d

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