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The control system of a certain type APU is analyzed and researched. Certain analysis on the mechanism of the structure and working principle of APU and study of the idea of its fuel control system are made. The main fuel flow control law and control algorithm are deduced by reverse analysis method. The formation principle is analyzed and the physical meaning is uncovered of interpolation table which involved in the control algorithm. The design principle of main fuel control law and control algorithm for this type of auxiliary power unit is mastered. It's a valuable reference for the future design of the control system of both aero-engine and auxiliary power unit. Keywords-auxiliary power unit; starting process; control algorithm; interpolation table fitting.

Analysis and Research on the Starting Process of Control Algorithm for Certain Type of Aviation Auxiliary Power Unit