Abstract: An aircraft environmental control system (4) for controlling a temperature of a fluid, the control system (4) comprising: a temperature sensor (30) configured to measure a temperature of the fluid and to generate a first signal, the first signal being indicative of the measured temperature; a control signal generator (52) configured to, dependent upon the first signal, generate a control signal for controlling the temperature of the fluid; and one or more processors (64) configured to, responsive to determining that the measured temperature is less than or equal to a pre-determined threshold value (e.g. 0° C.), increase a gain of the control signal generator (52).

Abstract: An aircraft environmental control system (4) for controlling a temperature of a fluid, the control system (4) comprising: a temperature sensor (30) configured to measure a temperature of the fluid and to generate a signal, the first signal being indicative of the measured temperature; a control signal generator (52) configured to, dependent upon the first signal, generate a control signal for controlling the temperature of the fluid; and one or more processors (64) configured to, responsive to determining that the measured temperature oscillates about a central value, decrease a gain of the control signal generator (52).

Abstract: An aircraft environmental control system (4) for controlling a temperature of a fluid, the control system (4) comprising: a first temperature sensor (30) configured to measure a first temperature and to generate a first signal, the first temperature being a temperature of the fluid, the first signal being indicative of the measured first temperature; an amplifier (76) configured to amplify the first signal; one or more processors (64) configured to, using the amplified first signal, generate a control signal for controlling the temperature of the fluid; and a second temperature sensor (68) configured to measure a second temperature, the second temperature being a temperature of an operational environment of the amplifier (76); wherein the one or more processors (64) are further configured to, responsive to the determining that the measured second temperature satisfies one or more predetermined criteria, modify a gain of the amplifier (76) and wherein: the aircraft environmental control system (4) further comp

Abstract: An aircraft environmental control system (4) for controlling a temperature of a fluid, the control system (4) comprising: a temperature sensor (30) configured to measure a temperature of the fluid and to generate a first signal, the first signal being indicative of the measured temperature;a control signal generator (52) configured to, dependent upon the first signal, generate a control signal for controlling the temperature of the fluid; and one or more processors (64) configured to, responsive to determining that the measured temperature is less than or equal to a pre-determined threshold value (e.g. 0° C.), increase a gain of the control signal generator (52).