19The response of the open-loop and closed-loop speed control system when τ 5 10 and K1. Ka. Kt =100. The time to reach 98% of the final value for the open-loop and closed- loop system is 40 seconds and 0.4 second,respectively.
31A block diagram model of a boring machine control system
32The response y(t) to (a) a unit input step r(t) and (b) a unit disturbance step input D(s) 5 1/s for K=100.
33The response y(t) for a unit step input (solid line) and for a unit step disturbance (dashed line) for K=20.
34The solar-powered Mars rover,named Sojourner,landed on Mars on July 4,1997 andwas deployed on its journey on July 5,1997. The 23-pound rover is controlled by anoperator on Earth using controls on the rover [21,22]. (Photo courtesy of NASA.)
35Control system for rover; (a) open-loop (without feedback) and (b) closed-loop with feedback. The input is R(s)=1/s.
36The magnitude of the sensitivity of the closed-loop system for the Mars rover vehicle.