Constant torque output controller of ducted fan, control method and satellite simulator

Abstract

The invention provides a constant torque output controller of a ducted fan. The controller comprises a main control unit, a current acquisition unit, a voltage acquisition unit, an AD conversion unit,a communication unit, a PWM driving unit and a power supply management unit; the PWM driving unit comprises a level conversion chip for converting TTL signals into COMS logic levels and a peripheralcircuit of the level conversion chip, the input end of the level conversion chip is connected with the main control unit, and the output end of the level conversion chip is connected with an electricregulation device of the ducted fan; the power supply management unit comprises a plurality of voltage conversion chips; the current acquisition unit is a linear Hall element current sensor and acquires current signals on a connecting line between the power supply management unit and the PWM driving unit; and the voltage acquisition unit acquires voltage signals of the power supply management unitthrough a signal amplifier chip and outputs the voltage signals to a main control chip. The controller adopts a power closed-loop control mode to realize constant torque output control of the ductedfan.

Description

technical field [0001] The invention belongs to the technical field of space vehicle ground full physical simulation thrust test and thruster ground simulation, and in particular relates to a ducted fan constant torque output controller and a control method. Background technique [0002] In the ground full-physics simulation test of the spacecraft control system, the multi-degree-of-freedom air-floating platform mainly realizes gravity unloading on the ground, providing a full-physics simulator equivalent to the spacecraft in the state of weightlessness in space, so as to provide satellite formation flight and orbit change Flight, rendezvous and docking, asteroid landing, etc. provide ground test means. During the simulation test, the widely used power device uses the injection of working fluid to generate reaction thrust, and according to whether its thrust vector passes through the center of mass of the spacecraft, it generates force or simultaneously generates force and m...

AI Technical Summary

Problems solved by technology

[0006] The gas cylinder is a high-pressure nitrogen gas cylinder. Generally, 25MPa is the maximum inflation limit. The outlet of the gas cylinder is generally 5MPa, so the pressure difference is 20MPa, and the volume of 27L corresponds to a standard atmospheric pressure of about 0.1013MPa. Therefore, the actual total volume of the gas is about ( 25-5)*10*27L; therefore, the air-conditioning thruster group is the largest output end of the air source on the stage. The high-pressure inflation process is very cumbersome and the preparation period is very long, which seriously affects the test efficiency.

[0007] (2) There is a large offset of the center of mass, causing a large disturbance moment

However, this requires the ducted fan to be compact and have a large output torque holding capacity

Generally, the torque output of ducted fans is mainly based on open-loop control. This control method not only reduces the stability of torque output, but also cannot guarantee the real-time performance of torque control.

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