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Implementation

d5

Black-box

specification of

behavior of

controller

Specification of

controller design

based on

functional

decomposition

d1

d4

d d32

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process

control

behavior

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Performance Monitor

Surveillance

CAS

PressureAltimeter

Mode Selector

RadioAltimeter

A/C Discretes

Display-Unit

Mode-S TransponderTransmitterReceiverReceiverReceiver

Intruder

Own-Aircraft

Ground-Station

Air Data Comp.

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Radio Altimeter

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Inputs:

TCAS-Operational-Status : {Operational, Not-Operational }

CAS

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Altitude-Climb-Inhib-Active : {True, False}Config-Climb-Inhibit : {True,False}

Increase-Climb-Inhibit-Discrete : {True,False}

Own-Alt-Rate : Integer

Alt-Layer

Increase-Climb-Inhibit

Climb-Inhibit

Descend-RA : EnumeratedClimb-RA : Enumerated

Combined-Control-Out : Enumerated

Aircraft-Altitude-Limit : IntegerStandby-Discrete-Input : {True, False}

Advisory-Status (expanded in section)

1

2

4

5

6

7

3

Effective-SL

Own-Aircraft

Radio-Altimeter-Status : {Valid, Not-Valid}

Barometric-Altimeter-Status : {Fine, Coarse}Own-Mode-S-Address : IntegerOwn-Air-Status : {Airborne, On-Ground}

Traffic-Display-Permitted : {True,False}

Own-Alt-Barometric : Integer

Own-Alt-Radio : Integer

Mode-Selector : {TA/RA, Standby, TA-Only, 3, 4, 5, 6, 7}Prox-Traffic-Display : {True,False}

Input:

2

4

5

6

7

Auto-SL

1 Layer-1

Layer-2

Layer-3

Layer-4

Increase-Descend-Inhibit

Descend-Inhibit

Inhibited

Not-Inhibited

Not-Inhibited

Inhibited

Not-Inhibited

Inhibited

C

Not-Inhibited

Inhibited

Vertical-Control-Out : Enumerated

Sound-Aural-Alarm : {True,False}

Output:

Aural-Alarm-Inhibit : {True,False}Own-Goal-Alt-Rate : IntegerVertcal-RAC : EnumeratedHorizontal-RAC : Enumerated

Î+�ÊO@�qOêQÓp(�Ô¢Õ�@ТkmŨ�~

&IÖ

Altitude-Lost

Track-Dropped

Clear-of-Conflict

Vertical-Control

Increase

Other

Crossing

Maintain

Reversal

C

VSL2000

VSL1000

VSL500

VSL0

Climb-VSL

No-Climb-VSL

C

Yes

No

Yes

No

RA

Advisory-Status

No-RA

Composite-RA

No-Descend-VSL

Descend-VSL

Negative

VSL0

VSL500

VSL1000

VSL2000

Descend

Climb

Positive

Combined-Control

Corrective-Climb

Preventive

No-Advisory

Corrective-Descend

Corrective-Climb

Corrective-Descend

Î+�ÊO@�qlêX×Þ(Ð�GÑEÏ�O�É�~m~�%

*QØ

Output:

Advisory-Code : {Other,PA,TA,RA}

Display-Arrow-Out : {Up,Down}Other-Relative-Alt-Out : IntegerOther-Range-Out : IntegerOther-Bearing-Out : IntegerOther-Bearing-OK-Out : {True,False}Other-Alt-Reporting-Out : {True,False}

Threat-Not-Tracked

Not-Tracked

Tracked

(Expanded next page.)

Not-Attempting-RM

Waiting-For-Reply

Waiting-To-Coordinate

Input:

Other-Aircraft [i]

Other-Alt : IntegerOther-Mode-S-Address : Integer

Other-Capability : {Non-TCAS,TCAS-TA,TCAS-TA/RA}Other-Sensitivity-Level : {Not-Known, 1, 2, 3, 4, 5, 6, 7}

Other-Transponder-Equippage : {ATCRBS,Mode-S}Other-Alt-Reporting : {True,False}Surveillance-ID : IntegerOther-Range : IntegerRange-Report-Time-Stamp : TimeOther-Range-Valid : {True,False}Other-Alt-Valid : {True,False}Other-Bearing : IntegerOther-Bearing-Valid : {True,False}TA-In-Sens-Level-2 : {True,False}Other-VRC : { None, Dont-Descend, Dont-Climb }Other-HRC : { None, Dont-Turn-Left, Dont-Turn-Right }

Track-Status RM-Send-Status

Î+�ÊO@�qyÙQÒp(�Ô¢~Ú@qU¢Ð¢kmŨ�~¢Ô¢Ñ#qUÑGkqUÕ

*GÛ

C

New Established

Other-TrafficProximate-TrafficPotential-Threat

PT-Timer

PT-Condition-Passed

CCrossing

Non-Crossing Own-CrossInt-Cross

Failed

Passed

Range-Test

Not-Waiting-To-Send

Waiting-To-Send Individual-Evaluated

Individual-Not-Evaluated

Display-Arrow No-Arrow

Up

Down

Traffic-Display-Status Threat-Sync

On-Ground Airborne

Other-Air-Status

1 2 30

Level-WaitNo

CLostYes

Climb

TA/RA-

C

Sense

Advisory

DelayRA

VSL-2000fpm

C

VSL-1000fpm

VSL-500fpm

Positive

Descend

Nominal-1500fpm

Increase-2500fpm

VSL-0fpm

Negative Negative

VSL-0fpm

Increase-2500fpm

Nominal-1500fpm

Positive

VSL-500fpm

VSL-1000fpm

C

VSL-2000fpm

Not-Selected Not-SelectedStrength-Strength-

Threat

Reversal

Reversed

Not-Reversed

Status

Altitude-Reporting

Intruder-Status

Tracked

Î+kÊQ@q¸ÙQÖEÜnÝ�mOÞ#q[

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