Hybrid electric propulsion system equipped with coupler for switching between operating modes

A propulsion assembly includes a first torque source coupled with a first shaft and a second torque source coupled with a second shaft. A coupler selectively couples the first torque source and the second torque source. When the first and second torque sources are coupled via the coupler, in response to a command to disconnect the first torque source, an unloading operation is performed to reduce the torque output provided by the first torque source to a threshold value, and when the threshold value is reached, the first shaft is disconnected from the coupler. When the first torque source is coupled with the coupler but the second torque source is not coupled with the coupler, in response to a command to couple the second torque source, a speed matching operation is performed to increase a speed of the second shaft to match a speed of the first shaft, and when the speeds match, the second shaft is coupled to the coupler. 一种推进组件，包括与第一轴联接的第一扭矩源和与第二轴联接的第二扭矩源。联接器选择性地联接第一扭矩源和第二扭矩源。当第一扭矩源和第二扭矩源经由联接器联接时，响应于使第一扭矩源断开的