nasa contractor reprrt 158896 of … · nasa contractor reprrt 158896 ... input data for the vorlax...

NASA Contractor Reprrt 158896

PLOTIT-METHOD OF INTERACTIVELY PLOTTING

iNPUT DATA FOR THE VORLAX COMPUTER PROGRAM

( N A S A C -158896) PLOTTT-HETHCD OF N78-28830 INTERACTIVELY PLOTTTNG I N P U T DATA FOR THE JORLAX C O n P U T E B PROGBAH (Vought Corp., Hampton, Va.) 44 p HC R 0 3 / N P A01 CSCL 098 U n c l a s

G 3 / 6 l 25903

Frederick M. Oenn

VOUGHT CORPORRTlon Hampton rechnlcal center

3221 North Armcstead Avenue Hampton. V~rgcnce 23666

an LTV Company

NASA CONTRACT NASI -1 3500

JUNE 1978

Nat~onal Aeronautics and Space Adn\~n~strat~on

bngley Research Centa Hampton,V~rgln~a 23665

https://ntrs.nasa.gov/search.jsp?R=19780020887 2018-08-26T14:25:41+00:00Z

f , l ~ i l p l l l i b .

1 ) . I 1 I . . . . , . 4 . jAt-~ j*

:i I I / I { ! SUMMARY

A method o f p l o t t i n g the geometric i npu t t o the VORLAX con~puter program 1 J ! by means o f an i n t e r a c t i v e remote computer termina l i s described. The so f t -

i t - 1 /

ware cons is ts o f a procedure f i l e and two programs and was developed f o r use

w i t h the Langley Research Center computer system. The programs and procedure

f i l e a re described and a sample execut ion i s presented.

INTRODUCTION -

The VORLAX computer program uses a sparse se t o f geometric i n p u t data t o

descr ibe the n i r c r a f t con f i gu ra t i on beinq analyzed. The geometry o f the

conf igurat ion can a t times become very cornglex, and i t i s necessary t o p l o t

the con f igu ra t ion r e s u l t i n g from the data i n order t o ascer ta in i t s accuracy.

The procedure f i l e and two computer programs described here in prov ide a

method f a r p l o t t i n g t h i s data a t an i n t e r a c t i v e graphics te rm ina l . A sample

execut ion o f the prccedure i s presented.

Use o f t h i s method a l lows the con f igu ra t ion t o be p l o t t e d w i t h any

combination o f r o l l , p i t ch , o r yaw angles. Three independent forms o f data

d isp lay a re ava i lab le , and these may be spec i f i ed i n any combination. These

are: ( 1 ) con f igu ra t ions w i t h o r wi thout camber, ( 2 ) conf igurat ions showing

on ly major panels o r on ly minor panels, slid ( 3 ) conf igurat ions w i t h o r w i thou t

con t ro l po in ts p lo t ted . Any sect ion o f the p l o t may be enlarged f o r examination

i n greater d e t a i l .

The procedure f; l e and computer programs t o p l o t the VORLAX inpu t data

have been w r i t t e n t c be used i n the Langley hesearch Center computer system

which p r c ~ i d e s a Network Operating System (NOS) and a Tekt ron ix P l o t 10

package. Langley Research Center users w i l l f i nd the procedure f i l e and computer

programs i n mass storaqe as pub1 i c f i l e s i n the ca ta log o f user nurnbr7r 214737C.

DISCUSSION

DESCRIPTION OF PROCEDURE FILES AND PROGRAMS

A method has been developed f o r p l o t t i n g t he VORLAX i n p u t data which

cons is ts o f a procedure f i l e and two computer programs. The procedure f i l e

PLOTIT and t h e computer programs READS and PLOTS are descr ibed i n t he f o l l ow -

ing. A sample execut ion i s provided which inc ludes i l l u s t - a t i o n s o f t h e d isp lays .

Procedure F i l e PLOTIT

Procedure f i l e PLOTIT (Appendix A) i s used t o simp1 i f y t he p l c t . t i ng

procedure. PLOTIT f i r s t gets the des i red data f i l e and renames i t TAPE?.

It then gets the b inary form o f program READS, which reads the i n p u t data

and prepares f i l e s su i t ab l e f o r the subsequent operat ions. PLOTIT then gets

and executes the b inary form o f PLOTS, which performs the a i r c r a f t geometry

p l o t t i n g .

Program READS

Program READS (Appendix B ) reads the VORLAX i npu t data f rom a d i sc f i l e

named TAPE1 and determines the necessary sca l i ng f ac to r i n order f o r the

a i r c r a f t drawing t o f i t on the screen.

The data f o r each o f t he panels a re then read, and t he coordinates o f a

set of po i n t s t h a t descr ibe the panels are ca lcu la ted . These coordinates a re

s tored on th ree d isc f i l e s named TAPE3, TAPE4, and TAPE5. These data f i l e s

w i 1 1 be read by program PLOTS.

Program RFADS provides the user w i t h two methods of represent ing the

a i r c r a f t . The f i r s t method d isp lays the a i r c r a f t w i t h camber as shown i n

f i g u r e 1 (a ) . The second method shows the a i r c r a f t w i thou t camber. F igure l (b )

i s the a i r c r a f t o f f 'gure 1 (a ) w i thou t camber.

Program PLOTS

Program PLOTS (Appendix C ) reads the data produced by program READS. This

program o f f e r s the user several va r i a t i ons i n the d i sp l ay which a re descr ibed

2

. . . L I . .

i n the f o l l ow ing sect ions.

Ro ta t ion o f t h e A i r c r a f t . - The i n i t i a l p o s i t i o n o f t he a i r c r a f t i s

a s ide view w i t h the nose t o t he l e f t . From t h i s pos i t i on , i t i s poss ib le

t o r o t a t e t he a i r c r a f t f i r s t i n r o l l , then i n p i t ch , and f i n a l l y i n yaw.

P o s i t i v e angles a re defined as fo l lows: r o l l , r i g h t wing down; p i t c h , nose

up; and yaw, nose r i g h t .

Add i t i ona l Independent Var ia t ions. - PLOTS o f f e r s two add i t i ona l

independent va r i 3 t i ons i n the d isp lay . These v a r i a t i o n s are: (1) w i t h o r

wi thout subpanel i ng and (2 ) w i t h o r w i thou t c o n t r o l po in ts . Examples o f these

va r i a t i ons a re shown i n f i gu res 1 ( c ) through 1 ( f ) . F igure I ( c ) shows the

a i r c r a f t w i thou t subpaneling o r con t ro l po in ts ; f i g u r e l ( d ) has subpanelin?

added; i n f i g u r e l ( e ) con t ro l poin..r 0;rly have been added; and i n f i g u r e 1 ( f )

con t ro l po i n t s and subpanclinp hdve been added. A l l u f the p l o t s a re

constructed us ing orthographic p ro j ec t i on .

Recovery from Ir .put E r ra rs . - I f an e r r o r has been rnade i n spec i f y ing - the inpu t parameters, t h e execut ion o f PLOTS can be stopped. There a re

three ways t o stop PLOTS wh i le i t i s executing. These are: ( 1 ) en te r

a value g rea te r than 360 f o r r o l l angle, ( 2 ) answer any o f the questions

w i t h STOP, o r ( 3 ) stop the prograni wh i l e i t i s p l o t t i n g by i n t e r r u p t i n g

i t w i t h the break key and then en te r ing an S.

Program PLOTS can be res ta r t ed a t the beginning by sending the cornmand

PLOTB t o the cornputcr. PLOTB w i l l a l so r e s t a r t the progrdrli i f i t i s stopped

f o r any o ther reason.

SAMPLE EXECUTION

Figure 2 shows a sample execut ion o f PLOTIT a t a remote te rm ina l . The

f i r s t comnand gets the procedure f i l e PLOTIT.

GET ,PLOTIT/UNz214737C

The second c~mnand i n i t i a t e s the execut ion of the procedure f i l e .

CALL, PLOT I T (T=VORLAXX )

VORLAXX i s the name of the f i l e on which the VORLAX data deck has been stored

1 f o r t h i s example. The f i l e name i n the c a l l i n g statement can be any name which F-1

I corresponds t o a f i l e on which VORLAX data i s stored. ..I

r{l The f i r s t question asked by the computer deals w i t h camber i n the panels.

DO YOU WANT CAMBER IN THE PANELS ?

TRUE OR FALSE

l;*l I f camber i s desired i n the panels, type i n TRUE, otherwise type i n FALSE

. . 1 and the camber w i l l be set equal t o zero. .[:..r ' 4 :,;

The next three questions asked by the computer are concerned w i th the

desired r o l l , p i tch, and yaw angles o f the conf igurat ion, and are as fol lcws.

INPUT THE ROLL ANGLE FOR THE AIRCRAFT

(DEG) , > 360 TO STOP.

PITCH ANGLE

YAW ANGLE

The angles desired i n degrees, are typed i n a f t e r the questions. I f termina-

t i o n o f the program i s desired, a value greater than 360 may be typed i n f o r

the r o l l angle.

The next two questions are concerned w i t h the d e s i r a b i l i t y of d isp lay ing

I paneling and contro l points. The two questions are:

SUBPANELING ? TRUE OR FALSE

CONTROL POINTS ? TRUE OR FALSE

I f these questions are answered TRUE, the subpaneling and cont ro l points are

incorporated i n t o the p lo t s . If they are answered FALSE, then these quant i t ies

are deleted. The p l o t resu l t i ng from the i npu t i n f igure 2 i s presented i n

f i gu re 3.

i If a ce r ta in sect ion of the p l o t needs t o be enlarged i n order t o examine

I the p lo t ted data more closely, t h i s may be acconlplished a t the terminal. When

I the computer has f inished p lo t t i ng , i t w i l l p r i n t the fo l low ing statement: I I FOR ENLARGEMENT INPUT YES

A t t h i s po in t a hard copy can be made i f desired. I f any rep l y except YES i s

typed in, the computer w i l l ask f o r a new se t of angles. I f YES i s typed in ,

the graphics cursor (cross ha i rs ) w i l l appear. The cursor should then be

located a t the lower l e f t corner [ f i g . 4(a)] o f a rectangular region t o be

enlarged. A non-control keyboard character should be pressed. This w i 11 cause

t i le cursor t o d i sap!~ear. The. carr iage re tu rn i s then pressed. This sequence

sends the c o ~ r d i n a t e s o f the f i r s t corner t o the computer. The graphics

cursor w i l l rssggear and should be relocated t o the upper r i g h t corner of the

desired rectangular region [ f i g . 4(b)]. A non-control keyboard character

and the carr iage re tu rn are then pressed as f o r the f i r s t corner. An enlargement

of the region def ined by these posi t ions o f the graphics cursor i s shown i n

f i gu re 4(c).

When the p l o t i s f in ished, the computer w i l l again p r i n t

-FOR ENLARGEMENT INPUT YES

This allows a fu r the r enlargement o f a sect ion o f the p l o t i f desired.

CONCLUDING REMARKS

A p l o t t i n g rout ine, PLOTIT, has been developed f o r p l o t t i n g the input data

f o r the VORLAX computer program. This program allows the user t o p l o t geometric

input data i n t e r a c t i v e l y a t a remote graphics termina 1 and thereby ascer ta in

very rap id l y whether o r not the data i s correct .

The rou t ine consists o f two programs and a procedure f i l e . These have

been designed f o r use on the Control Data Corporation computer system w i t h a

Network Operating System (NOS) and a Tektronix P lo t 10 graphics package a t the

NASA Langl ey Research Center.

REFERENCES

1. Miranda, Luis R. ; E l l i o t t , Robert D,; and Baker, Wil l iam M.: A Generalized Vortex L a t t i c e Method f o r Subsonic and Supersonic Flow

Applications. NASA CR-2865, December 1977.

APPENDIX A

PROCEDURE F I L E PLOTIT

This procedure f i l e gets the binary form o f READS(READB) and executes

i t , then gets the binary form of PLOTS (PLOTB) and executes i t .

P L O T I T .

RETURN,TAPE3,TAPE4,TAPES.

GET,TAPEl=T.

GET,READB/UN=214737C.

READB . RETURN ,READB.

GET ,PLOTB/UN=214737C.

PLOTB.

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c.UUUU+ 0 4 b O I d d U 4 C J Z Z Z Z 4 d N N n X N N L U - . Y ~ c t u n o n O N l l O D C > U 4 4 d w f f L Y & - - N N U - a ( - - - - -0000 + X N r C - C T ) X z m V ) U U U U - -- 8 QL

~ u Y u O O ~ I I @ - - ~ I I W O O - 4 U m V ) O U Z w z m d N * x N U m r N I 8 I I l r O r ~ u ~ U 4 U 4 n + n d N ~ N I A U w U N W C C C C C ~ ~ Z Z V ) ~ ~ - N N I I I ~ A A A ~ ~ c ~ ~ ~ o n n b o d n ~ ~ u ~ u w a t U ~ ~ U V U U U U N N 0 0 0 0 ~

CI

L

a 0

V) > c Z W \ Cn CI

Y . r + n I - CL w a . a - a d z * L U N a - ;Ux + > a w + - Z DI h X '-4 r W a - 4 d e x a m + c 2 4 > 0 A A 4 0 ZULU L u 2 0 ~ t m n n

- o x - . - U +

l u r . d + C N r r ~ 4 - 0 4 1 - 4

& I A N l * U W . r 0 3 b 4 - I n + * * a 0 0 0 - . 4 * 0 Q - ~ N 8 n a u n Z 4 W N O O + C C urn0 4 4 ~ u ~ ~a > 4 Z O a c C O L U a Z O U . O * U X O + - 2 , O > C r & + + O U Y m w Z L . - c ( d N m u m & 4 d O X + N + - > a d OII 8 II u J u Z w * 0 0 - - - C n > - c w L L I l U u u u Y U ~ Z 0 r - r

r C n - u o r * ~ c \ r r n V) LU d U a - - - C A C A r n d J C n r n c n W d W d - - ( Y a a ~ U ~ 4 0 ~ U 0 0 0 u U 3 U O w w > > >

APPENDIX 0 . - Continued

JZ

=(I

+J

-2)*

C+

IFU

G

RE

AD

S

JZ

l=J

2+

1

RE

AD

S

J2

2=

J2

+2

R

EA

DS

J

23

=J

2+

3

RE

AD

S

J2

4=

J2

+4

R

EA

DS

IF(LAYoEO~l)RATIO~(J-o5~/NVOR

RE

AD

S

IF

~C

AY

~E

Q~

O)

RA

TI

Q~

~Z

~*

~~

~~

CO

S~

PI

E*

J/

NV

OR

CO

SP

IE

*J

~O

NV

R

RE

AD

S

CA

LL

A

NG

LE(R

AT

IO,W

S,W

C)

RE

AD

S

XC

OR

D=

CD

lCO

S+

DE

lTA

CO

*RA

T

I0

R

E A

DS

T

EW

X-X

l+R

AT

IO*(

D

EL

TA

X+

XE

RP

)+

PC

OR

D*X

CO

RD

+X

OO

R

EA

DS

V

OR

S(l

,JZ

l)=

TE

Mx

-CR

OS

SIZ

W

RE

AD

S

VORS(19J22)*TEHX+CROSSIZ*UC

RE

AD

S

VO

RS

(1,

J2

3)=

VO

RS

( 1,

J2

4)a

TE

MX

R

EA

DS

T

EM

Y=

Yl+

DE

LT

AY

*RA

TIO

R

EA

DS

V

OR

S(2

,JZ

l)=

VO

RS

(2,J

22

)*T

EH

Y

RE

AD

S

TE

flZ

=Z

l+D

EL

TA

Z*f

?A

TIO

R

EA

DS

T

Efl

Z=

TE

NZ

+Z

ZG

+Z

Z*R

AT

IO

RE

AD

S

VORS(3pJZl)*TEHZ-CROSSIZ*WS

RE

AD

S

VORS(3rJ22)-TEMZ+CROSSIZ*WS

RE

AD

S

VO

RS

(~

PJ

~~

)=

TE

MZ

-V

Z

RE

AD

S

VO

RS

(3

9 J

24

)=

TE

MZ

+V

Z

RE

AD

S

VO

RS

(2

, J

23

)=

TE

MY

-V1

R

EA

DS

V

OR

S (

2,

JZ

I)=

TE

MY

+V

l R

EA

DS

IF

(JZ

4.E

O.5

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)CA

LL

S

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E(I

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GtC

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5

YN

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=Y

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RO

(l)*

CO

SIP

HI(

l)?

R

EA

DS

ZNOT=Z(l)-RO(l)*SINtPHI(l)

RE

AD

S

TE

MP

Z=

Xl+

CO

RD

l R

EA

DS

C

T

HIS

C

AL

C I

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S

TH

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SC

AL

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E.Z

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1

0

90

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DO

89

J

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NA

P

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AD

S

APPENDIX 8. - Continued

u t - a X 3 3 > m O Q z

d C LL x ln N +

C b- CJ 0 z Z * N + + d d a -4 a a x Mf VI ln * a LI 1

n H

u u - w

cn Z O H v m - * +

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IF

(12

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OF

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OU

T

SU

BP

AN

EL

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e

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RM

=(N

AQ

)*(N

VO

R+

l)

NV

RY

PR

O=

(NA

P)*

(NV

OR

+l)

IS

ET

S=

ISfT

SF

(NV

RN

PR

D)

WR

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( 3

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6

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I=

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N,N

VO

Rl

II=

(I

I/N

VO

Rl+

l X

TE

MP

=X

l+C

OR

Dl+

XA

F(I

I1

SK

AL

=Z

C(Z

, I

1 I

DO

5

55

J

=l,

NV

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l R

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)*S

KA

L

FI

=P

HI

( J

1 I

2r

I +J-1

+1

FU

G

VL

lRS

(l~

IZ)=

XT

EM

P

VO

RS

(2

9 I

Z)=

R*C

OS

(FI

)+Y

NJT

V~RS(3~I2)=~*SIN(FI)+ZNOT+CCIP3L*eOl*ZC(l~II)

IF(1

2m

E3

o5

00

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LL

S

AV

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55

54

J

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NV

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I @

J

Z=

J+

NV

OR

l ~5

V

OP

i(lr

J)

=X

l V

9R

S(1

9J

2)=

ll+

CO

RiI

l Y~RS(2rJ)~VORS(2,J2~~YNST+RO(J)*COS(PHI(Jl)

VOR3(3~J)=V9RS(3,JZ)=ZNOT+RO(J)*SIN(PHI(J))

CA

LL

Y

AV

E(I

FJ

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3,N

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R3

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L*

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TH

EN

P

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EA

CH

P

OIN

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PO

J=

PO

( 1

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q Z

UlO

N=

1,:4

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RE

AO

S

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AD

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RE

AO

S

I-?

AZ

O=

RO

(N)*

SIN

(PH

I(N

))

AZL=RO(N+~)*SIN(PHI(N+~))

AY

O=

RO

(N)*

CO

S(P

HI(

NH

AYl=RO(N+l)*C9S(PHI(N+l))

DA

Zm

AZ

O-A

Z 1

DA

Yr

AY

O-A

Y 1

H

=S

QR

T(O

AZ

*DA

Z+

DA

Y*D

AY

S

INE

(Nl=

DA

Z/H

C

OS

INE

(N)=

oA

Y/H

R

l=R

O(N

) R

Z=

RO

tN+

l)

F 1

=P

HI [

N)

FZ

=P

HI (

N+

l)

RO

(N)m

(Rl*SIN(Fl)+R2*SIN(F2))**5

20

10

P~I(N)~~Rl*COS(FlI+R2*COS~

FZ

) )*.5

PR

D*N

VO

R*R

NC

V

NN

O=

IRN

CV

-1)*

NV

OR

+1

N

NN

=P

RD

*4

ISE

TS

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ET

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(NN

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WRITE(~)NVOR,RNCV,PRD~NYNPNNH~~NO#

ISE

TS

C

AL

L

SA

VE

( IF

UG

p4

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p 1

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PZ

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KA

L,D

SK

L~

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MB

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TS

J

TE

MX

=T

EM

X+

Xl

DO

2

00

1 J

=lp

NV

OR

J

2=

( I+

J-2

)*4

+IF

UG

J

21

=J

Z+

l J

22

=J

2+

2

J2

3=

J2

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J

Z4

=J

2+

4

VS

=S

INE

(J)*

CR

9S

SIZ

H

S=

CO

SIN

E(

J )

*CR

OS

SIZ

T

EM

Y=

PH

I( J

)+

;KA

t+Y

NO

T

TY

2=

DS

KL

*PH

I (

J

TE

MZ

=R

O(J

)*S

<A

L+

Zb

OT

+C

AY

R

RE

AD

S

RE

AD

S

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APPENDIX 0, - Continued

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f f l n 4

LU 0 f o t *

N a o

- 0 a I-u 0 ul .U L U z , l m tOuJ'-4 r w Z O - 0 9 h 0 X r-4 V 2

NOOL m &I & P O n 0

m a 7 0 * o u 4 m x =I-r a A U Z N W 4 - 4 0 - 0

VI W V + aUJ>m Z O ~ X I X r CY 4 m c 3 - C 3 PI 4 U O N L. C- a

X V ) mcc CU - 4 UI * * W 4 Y V ) I Q 0 a o urn o I - ' u - Q L L ~ O n c n n 4 ~ ~ u u LO CL N cu o x a 4 4 ~ q 0 ~ c O W h W r U u O l 4 w C I * * Z w V) LILzPIrL4 C C 3 u - u \ ( U 4 cc C fl U I m W U 3 -uur-J-Uo 0 Q Q t c m z a o - L N I - N N a Z ~ L - a w W U I - A O O ~ X N O W V ~ U O U O - - - C L - X - W I + + a a v a - * o

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APPENDIX C. - Concluded

3 ; t ~ r ; ~ ~ h L PAGE p k ~ ) ~ QUALPP~P

/CET,PLOTIT/UN~214737C /C~LL,PLOTIT(T-UORLAXX) DO YOU YANT CARBER I N THE P6NELS 3 TRUE OR FALSE ? TRUE

INPUT THE ROLL ANGLE FOR THE AIRCRAFT (DEG), >368 TO STOP.

3 11 PITCH ANGLE 3 12 VAU ANGLE 3 13 SUBPANELINC 3 TRUE OR FALSE 3 TRUE CONTROL POINTS 3 TRUE OR FALSE 3 TRUE

F i g u r e 2. - Sample execu t i on o f prograni PLOTIT.

a; L 3 m -r LA-

nasa contractor reprrt 158896 of … · nasa contractor reprrt 158896 ... input data for the vorlax...

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