The Analysis and an Optimum Synthesis of Linear Servomechanisms

The concepts of minimum band width and nonminimum band width servo-mechanisms are introduced. Minimum band width servomechanisms are dealt with in this paper. A systematized approach to the synthesis of such servomechanisms is outlined and the method applied and detailed results obtained for one practical class of such servomechanisms. The technique enables the stability requirements and the accuracy requirements to be considered separately in succession. An engineering criterion of servomechanism stability is enunciated. The critical design parameters and performance characteristics, including amplitude and phase margins, are tabulated for a practical class of minimum band width servomechanisms over the range of degree of stability of engineering interest. The corresponding build-up times, damping factors, and natural frequencies also are tabulated. Extensions of the viewpoint and method described are outlined.