A controller of airborne intelligent pump source system based on dsp
A system controller and pump control technology, applied in pump control, machine/engine, mechanical equipment, etc., can solve problems such as increased heating power and low efficiency of onboard hydraulic systems, and achieve weight reduction, convenient performance expansion, and reduced The effect of reactive power
Inactive Publication Date: 2016-06-01
BEIHANG UNIV +1
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Problems solved by technology
However, since the working pressure of the constant pressure source is designed according to the maximum operating conditions, and in the typical flight profile of the aircraft, the flight time where the hydraulic system needs to use high pressure accounts for less than 10% of the total flight time, and the rest exceeds 90%. Only low pressure is needed to meet flight requirements during the time period. The efficiency of the onboard hydraulic system is relatively low when using a constant pressure source, and a large amount of reactive power is an important reason for the increase in the heating power of the onboard hydraulic system. one
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[0021] The intelligent pump controller and control method of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0022] Such as figure 1 Shown is a traditional constant pressure variable pump structure diagram. The variable mechanism of the traditional constant pressure variable pump consists of a pressure compensation valve, a follower piston and a return spring. The pressure compensation valve senses the outlet pressure of the pump, and completes the mechanical feedback control by comparing the outlet pressure with the set pressure, controls the movement of the follower piston, and then changes the inclination of the swash plate.
[0023] figure 2 is the pressure-flow curve of the traditional constant pressure variable pump, Q in the figure s -P s The curve is the output of constant pressure variable pump, Q L -P L It is the change curve of the load, and the shaded part in the figure represents the reactive power pr...
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The invention provides a controller of an onboard intelligent pump source system based on a DSP (digital signal processor). The controller comprises an intelligent pump control board and a signal conditioning board, wherein the intelligent pump control board comprises a DSP chip, a minimum circuit thereof, an AD (analog-to-digital) sampling circuit, a CAN (controller area network) communication module and a DA (digital-to-analog) output and voltage-to-current circuit; the signal conditioning board supplies electricity to the intelligent pump control board and a sensor and conditions collected analog signals, and the DSP chip is communicated with a host machine through the CAN communication module, receives control instructions, aircraft state parameters and work period task profiles from the host machine, determines the work mode of a hydraulic pump from a mode switching table, and calculates and outputs digital voltage signals controlling an electro-hydraulic servo valve to act, so that the real-time control on the inclined disc inclination angle of a hydraulic pump can be realized, the output pressure or the outlet flow rate of the hydraulic pump can be controlled through changing the discharge capacity of the hydraulic pump. The controller has the advantages that the control target can be changed according to the actual work conditions, noneffective power is effectively reduced, the heating of the hydraulic system is controlled, and the whole weight of an onboard hydraulic system is reduced.
Description
technical field [0001] The invention belongs to the technical field of hydraulic pump control and state monitoring, and in particular relates to a controller of an airborne intelligent pump source system based on DSP (Digital Signal Processor, digital signal processor). Background technique [0002] The on-board hydraulic system of civil aircraft refers to the system on the aircraft that uses oil as the working medium and relies on hydraulically driven actuators to complete specific manipulation actions. As one of the secondary energy sources of the aircraft, the onboard hydraulic system mainly provides energy for the functions of the aircraft's main control system, auxiliary control system, auxiliary adjustment of engine-related components, speed brake retraction, landing gear retraction, wheel brakes, and ground turning. , its performance and reliability play a decisive role in ensuring the safe flight of the aircraft, the realization of the design performance and the surv...
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IPC IPC(8): F04B49/06
Inventor 王少萍李宇昂常真卫王兴坚苟小华张超王永翔孙凯陈洪锋
Owner BEIHANG UNIV