Helicopter hydraulic steering engine tester and testing method

Abstract

The invention discloses a helicopter hydraulic steering engine tester and a testing method, which belong to the technical field of steering engine test. The tester comprises a box body and a main circuit, the input end of an input unit of the main circuit is used for being connected with a power supply on a helicopter, and the output end of the input unit of the main circuit is connected with oneend of each indication unit; the other end of each indication unit is connected with an output unit; the input end of a voltage regulation unit is connected with the input unit, the output end of thevoltage regulation unit is connected with one end of a polarity selection switch, the other end of the polarity selection switch is connected with one end of each servo valve switch, and the other endof each servo valve switch is connected with the corresponding end of the output unit; the first input end of each balancing valve switch is connected with the output end of the voltage regulation unit, the second input end of each balancing valve switch is connected with the other end of the polarity selection switch, and the output end of each balancing valve switch is connected with the corresponding end of the output unit. The tester has the advantages of simple structure, simplicity and convenience in operation, safety, reliability, high test efficiency and the like.

Description

Technical field[0001]The present invention mainly relates to the technical field of flight equipment, in particular to a helicopter hydraulic steering gear tester and a test method.Background technique[0002]The steering gear YD4 is a four-channel separated electro-hydraulic steering gear. The four main channels receive electrical signals from the autopilot system to control the attitude changes of the helicopter's tilt, pitch, overall distance and heading. There are also trim solenoid valves in the longitudinal and lateral control channels for force trimming. It combines the four steering gears of the horizontal, vertical, total distance, and heading control channels in a shell, which plays the role of electro-hydraulic conversion and hydraulic amplification. Installed in the control box behind the right driver, it can perform assisted control, automatic driving, and non-hydraulic forced control. In addition, the steering gear also has some functions of the steering system, that is,...

AI Technical Summary

Problems solved by technology

[0006] 1) The timing of the pilot's judgment of the fault is too late, which greatly affects the progress of the test flight. It is necessary to realize the inspection of the state during the simulated flight during the assembly stage, and advance the inspection time;

[0007] 2) At present, some test items of automatic driving can only be accurately judged during the test flight. There are certain safety hazards in the test flight verification, and flight simulation tests need to be carried out during the assembly stage;

[0008] 3) Judgment of the quality of the system performance, currently part of the judgment standard is the subjective feeling of the personnel, lack of objective and unified test standards, it is necessary to realize that all tests can be parameterized for performance judgment;

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