Automatic controllers

GPHYSICS G05Controlling systems G05BCONTROL OR REGULATING SYSTEMS IN GENERAL FUNCTIONAL ELEMENTS OF SUCH SYSTEMS MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS

G05B11/00Automatic controllers

G05B11/01electric G05B11/011details of the correcting means G05B11/012details of the transmission means G05B11/013using discharge tubes G05B11/015using rotating amplifiers G05B11/016using inductance means G05B11/017using photo-electric means G05B11/018using thermal amplifiers G05B11/06in which the output signal represents a continuous function of the deviation from the desired value G05B11/10the signal transmitted being dc G05B11/12the signal transmitted being modulated on an ac carrier G05B11/14in which the output signal represents a discontinuous function of the deviation from the desired value G05B11/16Two-step controllers G05B11/18Multi-step controllers G05B11/26in which the output signal is a pulse-train G05B11/28using pulse-height modulation using pulse-width modulation G05B11/30using pulse-frequency modulation G05B11/32with inputs from more than one sensing element with outputs to more than one correcting element G05B11/36with provision for obtaining particular characteristics G05B11/38for obtaining a proportional characteristic G05B11/40for obtaining an integral characteristic G05B11/42for obtaining a characteristic which is both proportional and time-dependent G05B11/44pneumatic only G05B11/46without auxiliary power G05B11/48with auxiliary power G05B11/50in which the output signal represents a continuous function of the deviation from the desired value G05B11/52in which the output signal represents a discontinuous function of the deviation from the desired value G05B11/54Two-step controllers G05B11/56Multi-step controllers G05B11/58with inputs from more than one sensing element with outputs to more than one correcting element G05B11/60hydraulic only