摘要:
The present disclosure provides methods, systems, and computer-readable media for the detection of valve faults based on transient air pressure measurements. For example, a method for fault detection may comprise actuating a shut off valve (222) to an open position, determining a first air pressure of air in an enclosed space at a first time, determining a second air pressure of the air in the enclosed space at a second time and in response to actuation of the shut off valve (222) to an open position, subtracting the first air pressure and the second air pressure to obtain an actual pressure difference, comparing the actual pressure difference to a predetermined pressure difference, and determining, based on the transient comparison, whether at least one of the shut off valve (222) and a check valve (212) is in a failed state.
摘要:
A system for motoring a gas turbine engine (10A, 10B) of an aircraft is provided. The system includes an air turbine starter (120A, 120B), a starter air valve (116A, 116B) operable to deliver compressed air to the air turbine starter (120A, 120B), and a controller (102A, 102B). The controller is operable to control motoring of the gas turbine engine (10A, 10B), detect a fault condition that prevents the controller (102A, 102B) from maintaining a motoring speed below a threshold level, and command a mitigation action that reduces delivery of the compressed air to the air turbine starter (120A, 120B) based on detection of the fault condition.
摘要:
A bowed rotor prevention system for a gas turbine engine includes a bowed rotor prevention motor 44 operable to drive rotation of the gas turbine engine through an engine accessory gearbox 40. The bowed rotor prevention system also includes a controller 46 operable to engage the bowed rotor prevention motor 44 and drive rotation of the gas turbine engine below an engine starting speed until a bowed rotor prevention threshold condition is met.
摘要:
Systems and methods for rotating a gas turbine engine (110) during a motoring cycle are provided. The system may comprise a controller (120) in electronic communication with an auxiliary power unit (APU) (130), a starter air valve (140), and a gas turbine engine (110). The APU (130) may supply compressed air to the starter air valve (140) which may supply the compressed air to an engine starter (150) in mechanical communication with the engine (110). The rotational speed of the engine (110) may be controlled by the engine starter (150) based on the pressure of the compressed air received from the starter air valve (140). The controller (120) may be configured to control airflow and air pressure through the system, by modulating the airflow from the APU (130) and/or from the starter air valve (140).
摘要:
A system is provided for cross engine coordination during gas turbine engine motoring. The system includes a first gas turbine engine (10A) of a first engine system (100A), a first air turbine starter (120A) of the first engine system (100A), a first starter air valve (116A) of the first engine system (100A), and a controller (102A). The controller (102A) is operable to command the first starter air valve (116A) to control delivery of compressed air to the first air turbine starter (120A) during motoring of the first gas turbine engine (10A), monitor cross engine data of a second gas turbine engine (10B) of a second engine system (100B) to detect a present condition or a commanded action that modifies an aspect of the compressed air received at the first starter air valve (116A), and command an adjustment to the first engine system (100A) to compensate for the modified aspect of the compressed air based on the cross engine data.
摘要:
A system is provided for alternating starter use during multi-engine motoring in an aircraft (5). The system includes a first engine starting system (101A) of a first engine (10A) and a controller (102A). The controller (102A) is operable to coordinate control of the first engine starting system (101A) to alternate use of power from a power source (114) relative to use of the power by one or more other engine starting systems (101 B) of the aircraft while maintaining a starting spool speed of the first engine (10A) below a resonance speed of the starting spool during motoring of the first engine (10A).
摘要:
A bowed rotor prevention system for a gas turbine engine includes a bowed rotor prevention motor 44 operable to drive rotation of the gas turbine engine through an engine accessory gearbox 40. The bowed rotor prevention system also includes a controller 46 operable to engage the bowed rotor prevention motor 44 and drive rotation of the gas turbine engine below an engine starting speed until a bowed rotor prevention threshold condition is met.