Full mold aircraft fuel tank bottom level test bench test port position determining method

The present invention pertains to an aircraft fuel system testing techniques, to an aircraft fuel tank level full-mold test station position determining method bottom of the test port. Wherein the step of determining the tank bottom of the test port position as follows: establishing fuel full-mold test stage coordinate system; obtaining a bottom surface of the tank cavity model; tank cavity model bottom surface discretization; acquiring posture discrete array collection; configuration and attitude discrete array each set corresponding to an array of discrete attitude, the coordinate origin through the set rotation plane; determining model tank chamber bottom undetectable position that minimizes the sum of the amount of oil. The present invention can be designed in a variety of gesture, to maximize oil test range to meet the needs of modern aircraft fuel system-level test mode test bench system design.