DE2327743B2 - Device for controlling the position of a body about an axis - Google Patents

Description

TKÄSSfÜii-1, 3, thus characterized by the fact that the spring links are each shaped

an end of the rope! "to" fm ^ _d " _{m | l} " ■ -. "

^ f ^^ fitted, st.

i ₈ . 2 show, enlarged and schematic, "e" TI

Delete »« a B, oc _k diagrarr, rr,, "er

Ld 2 show e.nen body 10. ^ r, _A = hse XX chewing "will be sol, M

3 ₅

The invention relates to a device for controlling the position of a body around an axis.

There are many cases where the position must be maintained constant of a body to eme axis If such a body truncated by an axle so ₊ o is such control only eme question of Pert position of movement about said axis and dei exercise a restoring torque m by means of extended control surfaces to correct the rotation around the axis. The movement can be measured with the aid of a gyroscope.

With artificial saUllites or other freely suspended Bodies, however, cannot produce a Achieve correction in this relatively simple way. The usual method of correcting the position then exists with the help of gas jets the body in question to rotate one of its three axes. After is in a hurry here, however, that the momentum of a gas jet gives the body a torque which it can if it can corrected, causes the body to move suierlich. It must therefore be an opposite Directed impulse applied to the To stop movement. Such a system therefore requires an almost continued use of gas

shine. However, since the gas supply is limited .st and a. This means that the operating time cannot be renewed of a satellite severely limited.

The invention is therefore based on the object of providing a device of the type mentioned at the beginning, which is a control of the position of a body around Sd. Axis without the application of external impulses in particular made possible without the use of gas jets.

posed. _{the weight 13 is} an electric

J ^ J _{15 so arranged} that the mass 12 is balanced about the axis of rotation. ,. _c . ■,

suitable control circuit. A m the _length JJ bauter motor 16 is provided with an overall ^ Y _"k ^eg, _{tjdas the} rotation of the motor 11 Nebe ^ Pg _HWI impulse n» t-controlled

™ «J ^e converts. The output of the transmission 17

p _mi. oe connected _{to the sensor 18}

f ^e ^ output ^. _{the wink} ^ _{stel, clothes}

and determines the direction of the mass 12. The exit and the "R ^^" _{to an electric} magnetic passage, of which the ^ a _closed . _This controls that

Ste ^ circuit 1 £ ^ _{Elcktromagneten} I ₅ , d, e An'egen ^^ s ^ _sjnd

.ufd er ^ Mjl ^ _E ^ _device 20 intended to de «is e ^^ _{purpose-built} prw _e , _{& e} , n

Position of the μ movements around the axis

Fonn e me κ. « . ^ _{L eßgerat 2} 0 can be fixed by XX _{the wcnn e} j _n change of

jJ ^ Serig ^ _The output of the Lagemeß-Lag e control circuit 19 connected,

serates zum ™ _{hwingt the} mass 12 at an angle of I ^ ™ ⁶ ^ f

in the

dgg

Control circuit 19 angesch ™ _{hwingt the} mass 12 at an angle to ^ _i f the predetermined frequency, _itIlde J _rd controlled and can EFSE ± 10 °. The position of the Gew is controlled in such a way that under static loads

^ oJUte not on the axis XX to ^ _{emen kon} .

Adhere to nd of the axis.

_{0 10} rotated about the axis XX ^ _{who (} £ _n controlled the weights so that

during the rotation of the mass 12 m in one direction Since Z _{1 is} greater than /, and / and g _} remain constant,

If the weights m are one of their extreme positions, then q _{% is} greater than ρ »'and the body 10 has one

while a counterclockwise rotation of the mass 12 results in a counterclockwise rotation from g _% to &'

In the opposite direction, the weights are carried out in their other direction.

Are extreme positions. This calls for a change or 5 If the procedure is repeated, this results in a Modulation of the moment of inertia of the mass 12 further counterclockwise rotation of the body 10.

emerged. SoU the body 10 in the opposite direction,

rv- " \ / _nr rir.ur. _mB "-w *" * t i "- a n ~"<* · ^η · ^{m are turned} clockwise, this will be

The device works as follows: the moment of inertia of the mast 12 in the opposite

Assume that the body 10 has modulated an inertial phase. This means that the weights moment / and the mass 12 has em inertia 13 in its outermost position at counterclockwise moment /, then a rotary movement of the mass 12 leads to the mass 12 and it in its innermost position around the axis XX by an angle Q ₁ to the fact that the mass 12 are at Uhrzeigerdrebung. If the body is required in the opposite direction to no rotation 10, so that is an angle Q _t rotates so that position 15 of the weights constant gebalten, preferably jg _ j, m as the innermost position to the strength of the

Reduce vibration of the body 10. The same applies to a rotation of the mass 12 in the proposed method for modulating the

opposite direction. If thus the moment of inertia of the mass 12 can be varied,

moments of the body 10 and the mass 12 20 The control can also be for two or 3 axes

are kept constant, so both oscillate to be applied, whereby for each controlled axis

a middle position. a small rotatable mass with variable inertia

However, if the mass 12 is required, for example, in unit moment.

Rotates clockwise, while its torque If, for example, the mass 12 I% of the total has a maximum Z ₁ , then the angle ρ ₂ represents the moment of inertia and this mass, the body 10 rotates in the opposite direction, performs an oscillation of ± 10 ° , as explained above, given by ρ ₂ = I ₁ QjI. If now the mass 12 changes its position by O ₁ I ⁰ per second it rotates counterclockwise, while you rotate with an oscillation at 5 Hz. Such a position torque has a minimum Z ₂ , then the change in wind or the rate of change is suitable kel ρ ₂ 'by which the body 10 rotates differently in the clockwise direction 30 to compensate for the small, random position changes, namely ^ qJI. ments that occur with satellites.

For this purpose 2 sheets of drawings

Claims (1)

this is achieved by a it is appropriate that «te , »» El Sehte (J3) suggests that the W «1« »OT are balanced so that the distances between the weights (13) and the axis of rotation of the Sprueh 2, thereby creating ^ SLÄS