Modern Control Dynamics and Stability Criteria as Applied to Gyroscopic Speed Detectors With Hydraulic Drive

A gyroscopic speed detector is described and its application to the speed control of a steam or gas turbine is discussed. A frequency-response method of analysis of regulatory systems, involving the use of Nyquist’s criteria, is presented and applied to the analysis of the stability of the turbine-speed regulatory system. The results obtained are compared with results from the classical approach, involving the solution of the characteristic equation of motion of the system.