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Universidad Politécnica de Cartagena TESIS DOCTORAL “UNA ...

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1. Cinemática Directa <strong>de</strong>l brazo manipulador<br />

Apéndice<br />

El brazo está constituido por dos segmentos (l1 = 28 cm; l2 = 20 cm) y dos<br />

articulaciones, la <strong>de</strong>l hombro y la <strong>de</strong>l codo. La articulación <strong>de</strong>l hombro posee 3<br />

GDL todos ellos <strong>de</strong> revolución y la <strong>de</strong>l codo posee un solo GDL tal y como<br />

muestra la Figura A.1. La cinemática directa <strong>de</strong>l extremo <strong>de</strong>l brazo respecto un<br />

sistema <strong>de</strong> coor<strong>de</strong>nadas centrado en el hombro (a = b = c = 0) es<br />

= cos<br />

= sin<br />

c ( ) ( ) ( )<br />

c ( ) ( ) ( )<br />

( )<br />

x = a + l ⋅ ⋅ c s − s s c + l ⋅ s ⋅ s s s + c c + l ⋅ c s −s<br />

s c<br />

2 4 1 3 1 2 3 2 4 1 2 3 1 3 1 1 3 1 2 3<br />

y = b + l ⋅ ⋅ c s c + s s − l ⋅ s ⋅ c s s − s c + l ⋅ s s −c<br />

s c<br />

2 4 1 2 3 1 3 2 4 1 2 3 1 3 1 1 3 1 2 3<br />

z = c + l ⋅ c s s − c c c − l c c<br />

don<strong>de</strong><br />

c<br />

s<br />

2 2 3 4 2 3 4 1⋅ 2 3<br />

( θ )<br />

( θ )<br />

j j<br />

j j<br />

j = 1,2,3, 4<br />

x 0<br />

θ 2<br />

b<br />

z 0<br />

θ 1<br />

a<br />

l 1<br />

l 2<br />

c<br />

θ 3<br />

θ 4<br />

y 0<br />

(A.1)<br />

Figura A.1. Estructura cinemática <strong>de</strong>l brazo manipulador empleado en las simulaciones <strong>de</strong>l<br />

Capítulo 5. Las flechas rojas indican el sentido <strong>de</strong> giro <strong>de</strong> cada GDL.

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