A micro/small jet engine fuel control system and control method

Abstract

The invention discloses a micro / small jet engine fuel control system and a control method. The system comprises an upper computer, a lower computer, a human-computer interaction interface, a wireless transmission device, an aircraft environment monitoring module, a servo drive module, an engine rotating speed feedback device and a micro / small engine fuel system. The method includes the steps that the lower computer inputs the control rule of engines of the corresponding models, the human-computer interaction interface transmits aircraft flying parameters to the upper computer, the upper computer transmits the aircraft flying parameters to the lower computer, the lower computer compares the parameter values with actual parameter values, and a target engine rotating speed signal is generated through the air temperature and pressure according to the engine control rule; and the target engine rotating speed signal is compared with a target engine rotating speed, a pulse width modulation (PWM) signal is output, a driving circuit is controlled, and the driving circuit adjusts the rotating speed of a gear pump so that fuel flow can be precisely controlled. The control method is systematic, scientific, simple, convenient and fast, and intelligentization and miniaturization are achieved through the embedded technology.

Description

technical field [0001] The invention belongs to the field of aerospace control, in particular to a micro / small jet engine fuel control system and control method, and also involves embedded technology, wireless control and transmission technology, servo drive technology, sensor technology and pumps, especially suitable for Power plant for unmanned micro / small aerospace vehicles. Background technique [0002] The design of micro / small aviation vehicles (such as micro / small UAVs) needs to follow special technical indicators such as small size, fast speed, and large altitude range changes, and the structure of its power plant is required to be simple. At present, the power devices of domestic and foreign micro / small aircraft are mainly piston engines and gas turbine engines. Piston engines are suitable for aircraft with low speed, low altitude and low take-off weight. For aircraft with high speed, height and quality, gas turbine engine is the most suitable power plant. Micro / ...

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Problems solved by technology

[0007] In view of the defects or deficiencies in the above-mentioned background technology, the object of the present invention is to provide a micro / small jet engine fuel control system and control method, which is used to solve the problem of large volume, insufficient combustion, high fuel consumption, and control problems of the fuel system in the prior art. The system and mechanical hydraulic adjustment device have complex structures, low adjustment accuracy, difficult maintenance, and the fuel pump must be driven by the engine rotor through the transmission mechanism, resulting in poor dynamic performance and other problems

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