1 - HKU Libraries

T P n Twf V 7
T.P.D.M.V.2.2
(Al/2001)
DIAGRAM 2.2.3.9
PREDICTION OF RIGID VEHICLE SWEPT PATH
-SCHNEIDER METHOD
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It
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12
13 U
t. DRAW APPROPRIATE RADIUS Rt, i.e. 10m, 12m, 15m.
2. DRAW OUT LIKE OF VEHICLE WHERE Ai 81 & Di Ct
* WIDTH , Ai Di AND Bt Ci - li + 12 * 13 * U AND
Yi OUTSIDE POINT OF FRONT AXLE , COINC IDES WITH
TANGENT POINT , AND Ai Yt * li , Yi X 1 = t 2 * la AND
XiDi= U .
3. DRAW ARC FROM POINT YI OF RADIUS > THAN WHEEL
BASE, i.e. Yi Xi TO INTERSECT RADIUS Ri AT Yz .
4 POINT E IS MID-POINT OF ARC Y2 Yi .
5. JOIN E Xt
6. DRAW ARC OF RADIUS Yi Xl FROM POINT Y 2 .
7. WHERE ARC INTERSECTS E Xt IS POINT Xz,NEXT
POSITION OF OUTSIDE REAR AXLE .
C1
8. JOIN X2 Y2
9. CONSTRUCT A2, B 2 .C2,D2 NEXT POSITION OF VEHICLE,
i. e. A2 Y2 = li ,
A2 B2 = WIDTH .
A2D2= U * I 2 * 13 * I 4
10. REPEAT UNTIL VEHICLE COMPLETES TURN, eg. 90° OR 180°.