Aircraft Auxiliary Power Unit Power Allocation Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current power management systems for aircraft auxiliary power units struggle to optimally manage pneumatic and mechanical power sources in relation to other aircraft power sources and load requirements, leading to inefficiencies and suboptimal energy allocation during different flight phases and conditions.
Innovation Solution
A method that calculates the maximum mechanical power take-off capacity of the auxiliary power unit, compares it to the actual mechanical power withdrawn, and determines corrective actions to adapt power allocation among various power sources and loads, ensuring optimal energy usage based on excess or insufficient capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dedicated control unit with fixed operating logic is used to manage power from the auxiliary power unit, then the control system is simple and reliable, but the system cannot optimally manage power allocation in relation to other aircraft power sources and load requirements
Solution Approach 1:
The patent merges the APU power management function with the aircraft's existing centralized power management system (avionics). Instead of using a dedicated APU control unit with fixed logic, the invention integrates APU power calculation and allocation logic into the central power management architecture, allowing unified optimization of all power sources (APU, engines, batteries) and loads across the aircraft.
Solution Approach 2:
The invention makes the centralized power management system universal by enabling it to handle multiple power source types (pneumatic APU power, mechanical APU power, engine power, battery power) and coordinate them with various aircraft loads. The same control architecture manages all power sources rather than requiring separate dedicated controllers for each.
2Productivity
If the auxiliary power unit operates with fixed priority logic for pneumatic and mechanical power systems, then the control logic is simple, but the system cannot dynamically optimize energy usage based on actual aircraft requirements and flight conditions
Solution Approach 1:
The invention implements dynamic power management where the system continuously calculates the actual mechanical power drawn by the APU, compares it with the maximum mechanical power take-off capacity, and automatically adjusts power allocation based on real-time aircraft conditions. The control logic adapts to changing flight phases, load requirements, and power source availability rather than following fixed priority rules.
Solution Approach 2:
The system incorporates feedback mechanisms by monitoring actual power consumption and capacity utilization, then using this information to optimize power allocation. The centralized management system receives data from various sensors and systems, processes it through optimization algorithms, and adjusts power distribution to maximize efficiency while meeting aircraft requirements.
Data Source
Figure 1~3
Figure 4
AI summary
The invention relates to a method for managing the extraction of power produced by an auxiliary power unit (30) of an aircraft, characterized in that the method comprises: - a step of calculating a maximum mechanical power extraction capacity (C3) that the auxiliary power unit (30) can supply to the aircraft, - a step of determining an actual mechanical power extracted (C1) by a first mechanical power extraction system (36) of the auxiliary power unit (30), - a step of comparing the maximum mechanical power extraction capacity (C3) and the actual mechanical power extracted (C1), - a step of optimizing the mechanical power extracted which, from the comparison of the maximum mechanical power extraction capacity (C3) and the actual mechanical power extracted (C1), determines at least one corrective action.The invention also relates to an aircraft comprising a device for managing the withdrawal of power produced by an auxiliary power unit (30) of the aircraft.