3 Rotating antenna I.=0.8lbfis Gear Box 10:1>N=10 6(t=1sec)=180=万rad Find motor voltage Start up Torque Problem 1)Find required load acceleration 6t0-号f (from rest) 9.280 4-是-2md1g au =Na =10*2m=20xrad/s 2)Find inertia I=1(negligable)+ -0.8bt-0.08bm 100 3)Find startup torque T=I*a=0.008lbfis**20xrad /s2 =0.51bft =96.5in-oz 4)Find voltage T =96.5in-oz 0=0 Startup speed is zero 500 400 10V 300 -12V 200 15V 5V 100 0 50 T004150 T:9a.5 Torque (in.-oz) 0.5 1.0 Torque (N.m) V is about 10 voltage