Aviation high-pressure fuel pump constant-oil-pressure fuzzy adaptive control system and control method thereof

Abstract

The invention discloses an aviation high-pressure fuel pump constant-oil-pressure fuzzy adaptive control system and a control method thereof. The aviation high-pressure fuel pump constant-oil-pressurefuzzy adaptive control system comprises a front-end oil pressure acquisition sensor, a middle-end constant-oil-pressure controller and an end effector high-pressure fuel pump. The constant-oil-pressure controller comprises a hardware circuit and a software control algorithm. According to the aviation high-pressure fuel pump constant-oil-pressure fuzzy adaptive control system, constant-pressure control over oil pressure by pulse width modulation (PWM) signals output by an electronic control unit (ECU) of a German 3W aviation piston engine can be met, a constant-oil-pressure feedback control algorithm based on fuzzy adaption is designed, constant-oil-pressure closed-loop control is independently completed by receiving expected oil pressure instructions of other types of ECUs through a digital communication interface, and the universality of the high-pressure fuel pump is further improved. Compared with a conventional PID control algorithm, the control algorithm provided by the inventionshows that the control method based on fuzzy adaptation has good robustness, and meanwhile, the control precision of oil pressure of different oil pressure sections is improved.

Description

technical field [0001] The invention belongs to the fields of energy, power and automatic control, in particular to a general fuzzy self-adaptive control system for constant oil pressure of aviation high-pressure fuel pumps. [0002] technical background [0003] The engine fuel electronic injection system, with its precise fuel quantity control, meets the best air-fuel ratio required by the engine under various working conditions, greatly improves the engine's work efficiency, and reduces the emission of incomplete combustion gas, which complies with the development of engine energy saving and emission reduction It has broad application prospects and has become one of the current research hotspots. The high-pressure fuel pump constant oil pressure control system plays a vital role in the engine fuel injection system. The oil pressure in the fuel injection pipeline determines the fuel injection speed of the fuel injector. Under the premise of constant oil pressure, the fuel ...

AI Technical Summary

Problems solved by technology

However, the conventional constant oil pressure control algorithm can only adapt to precise control within a certain oil pressure range. Once the required oil pressure exceeds this range, it is necessary to manually change the controller parameters, which is less robust

Moreover, the current aviation high-pressure fuel pump can only be used with the original engine ECU, which is not compatible with each other and has poor versatility.

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