Sliding block executing mechanism used for attitude control over solar sail spacecraft

Abstract

The invention provides a sliding block executing mechanism used for attitude control over a solar sail spacecraft. The sliding block executing mechanism comprises a central box, a pre-tightening regulating unit, a control unit, a driving wheel unit, a driven wheel unit and an adjustable auxiliary driven wheel unit; a telescopic arm penetrates through a hole in the center of a front panel and a hole in the center of a rear panel of the central box; the pre-tightening regulating unit comprises a pre-tightening screw and a pre-tightening nut, and the pre-tightening screw penetrates through an upper panel of the central box; the control motor is driven by obtaining electric energy from a solar battery; the driving wheel unit comprises two protruding idler wheels which are connected with a motor shaft of the control motor through connection shafts, and the outer walls of the two protruding idler wheels make tight contact with the periphery of a stretching arm; two protruding idler wheels of the driven wheel unit penetrates through a rotary shaft and are arranged between two polytetrafluoroethylene sliding rings, the outer walls of the two protruding idler wheels make tight contact with the periphery of the stretching arm, and the rotary shaft is fixed to a support of a lower panel of the central box; the adjustable auxiliary driven wheel unit comprises four protruding idler wheels and four triangular supports, and the triangular supports are regulated so that the outer walls of the protruding idler wheels can make tight contact with the periphery of the stretching arm.

Description

technical field [0001] The invention relates to a slider actuator for attitude adjustment of a solar sail spacecraft, in particular to a slider actuator for attitude control of a solar sail spacecraft. Background technique [0002] Most modern spacecraft power models use liquid, solid or other complex engines, and their propulsion forms use the reverse thrust provided by the ejected high-speed mass to obtain thrust. With the increase of spaceflight mission distance and running time, it must carry more and more fuel, which will increase the launch cost of the spacecraft, which makes the solar sail spacecraft relying on light pressure or magnetic pressure as the lasting power emerge as the times require . Solar sails are driven by sunlight and light pressure, which is a unique propulsion method that surpasses the dependence on reactive materials. Its working principle is: use the solar sail to reflect the irradiated sunlight (photons) back, because the force is mutual, when ...

AI Technical Summary

Problems solved by technology

[0007] For the variable reflectivity film structure, it does not require any motion actuators, which greatly reduces the structural complexity and launch quality of the solar sail spacecraft, but its control torque is limited, and it has high requirements for the sail material technology

Images