In an actual servomechanism which could be represented by the block diagram of Figure 2-4, one usually finds that the viscous friction inherent in the physical system ... of our second-order servomechanisnis throughMerivative -feedbackaquot; . ... The velocity Qq of the output can be obtained by electrical or mechanical means.
|Title||:||Principles of Automatic Control|
|Author||:||University of Michigan. Engineering Summer Conferences|