Abstract: An aircraft environmental control system (4) for controlling a temperature of a fluid, the control system comprising: a temperature sensor (30) configured to measure a temperature of the fluid and generate a signal indicative of that temperature; a control signal generator (52) configured to, using control laws (78) and the first signal, generate a control signal for controlling the temperature of the fluid; a memory (56) for storing performance data; a transmitter (60) configured to transmit, from the aircraft environmental control system (4), the performance data; a receiver (60) configured to receive, responsive to transmitting the performance data, update information; and an update module (58) configured to, using the update information, update the control laws (78).

Abstract: An aircraft environmental control system (4) for controlling a temperature of a fluid, the control system comprising: a temperature sensor (30) configured to measure a temperature of the fluid and generate a signal indicative of that temperature; a control signal generator (52) configured to, using control laws (78) and the first signal, generate a control signal for controlling the temperature of the fluid; a memory (56) for storing performance data; a transmitter (60) configured to transmit, from the aircraft environmental control system (4), the performance data; a receiver (60) configured to receive, responsive to transmitting the performance data, update information; and an update module (58) configured to, using the update information, update the control laws (78).

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