Ground Power Unit Phase Synchronization for Parallel Engine Start
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Solution Overview
Problem
Existing ground power units (GPUs) are inadequate to meet the higher energy requirements of advanced aircraft, particularly unconventional jet engines, and lack scalability to accommodate various energy demands.
Innovation Solution
A method and system for synchronizing multiple GPUs by phase-locking their output signals to combine their power, allowing for increased energy supply by connecting them in parallel, thereby meeting the energy needs of both conventional and unconventional jet engines using lower-rated GPUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple GPUs are connected in parallel to increase power output, then the energy supply capability is improved, but the phase synchronization complexity increases
Solution Approach 1:
The system continuously monitors the phase difference between master and slave GPU outputs and uses this feedback to dynamically adjust the slave GPU's operating frequency, ensuring automatic phase synchronization without manual intervention
Solution Approach 2:
The slave GPU's frequency parameter is dynamically adjusted based on the measured phase difference, allowing the system to adapt to varying conditions and maintain synchronization across different operational states
2Measurement precision
If the slave GPU frequency is dynamically adjusted to achieve phase locking, then the synchronization accuracy is improved, but the system stability may deteriorate
Solution Approach 1:
The system implements periodic measurement of phase difference and periodic adjustment of frequency in a controlled cycle, preventing chaotic fluctuations while maintaining synchronization accuracy through rhythmic correction
Solution Approach 2:
The synchronization process operates continuously with uninterrupted monitoring and adjustment, ensuring stable phase locking without gaps that could cause system instability
3Adaptability or versatility
If a dynamic frequency adjustment mechanism is implemented for phase locking, then the adaptability to different phase shifts is improved, but the device complexity increases
Solution Approach 1:
The slave GPU automatically adjusts its own frequency based on real-time phase difference measurements without requiring external control systems, enabling self-synchronization and reducing overall system complexity
Solution Approach 2:
The frequency adjustment mechanism serves multiple functions including phase synchronization, frequency matching, and adaptive coordination between GPUs, reducing the need for separate specialized components
Data Source
AI summary
Output signals from ground power units can be combined to supply more energy for aircraft to use for starting a jet engine. The combining can be possible when the outputs from the ground power units are synchronized. In a synchronization process, a first ground power unit may be started so that its first output signal serves as a reference for the synchronization. Then, an interconnect on a second ground power unit can be toggled to start and stop the generation of a second output signal at different times until the signals are in phase (i.e., synchronized).