P refrigeration process using an artificial neural network The present disclosure relates to a process for cooling a circuit (3) for supplying cryogenic fluid comprising a step of acquiring (E1) a value (T ° c) of the state of the circuit (3) d 'supply of cryogenic fluid at a current instant (tc), a calculation step (E2) of a corresponding instant (tcmd, i) of opening of each valve (VAO, VMRO, VPO) among one or more valves of the circuit (3) supplying cryogenic fluid, and an opening step (E4) of each valve (VAO, VMRO, VPO) at the corresponding instant (tcmd, i) to cool the circuit (3) of cryogenic fluid supply. The calculation step is performed by a computer applying an artificial neural network to calculate a valve opening sequence (VAO, VMRO, VPO) making it possible to reach, from the value (T ° c) of the state of the cryogenic fluid supply circuit (3) at the current time (tc), a state of the cryogenic fluid supply circuit (3) satisfying one or more predetermined cooling criteria at a predetermined time (t end) in the future. This disclosure also relates to a cryogenic fluid supply circuit (3) and its control unit (15), configured to implement this method, as well as a thruster (1) incorporating such a supply circuit (3). in cryogenic fluid as propellant. Figure for the abstract: Fig. 5.
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