Questions tagged [magnetorquer]

Questions regarding devices which use an external magnetic field to produce a torque, usually used to help align a spacecraft in a certain manner while in orbit.

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16
votes
5answers
20k views

Can magnets be used to launch spacecraft?

I assume there is some reason we don't use magnets to launch off Earth. Are they not strong enough? Isn't magnetic force technically stronger than gravity?? Would either of these work: A tube tunnel ...
15
votes
2answers
8k views

What is the math behind Magnetorquers?

I'm trying to better understand the mathematics behind how torque rods work. I know that even if you have 3 axis of magnetic torquers, in effect there is only 2 axis of control, and I'm trying to ...
6
votes
1answer
466 views

Could an articulated permanent magnet work as a low-power cubesat magnetotorquer? Problems?

Conventional magnetotorquers for cubesats are electromagnets that produce torque in the Earth's magnetic field, and nearly all of the power they use just heats the copper through $\text{I}^2 \text{R}$ ...
10
votes
1answer
2k views

Would magnetic torquers placed in a polar satellite work?

Would magnetic torquers placed in a polar satellite keep the satellite stable? If it would work, would it be very efficient?
7
votes
1answer
974 views

Will this magnetorquer configuration effectively desaturate a reaction wheel?

I'm trying to run a Matlab simulation for desaturation of a reaction wheel using magnetorquers. But there is still something that I'm not entirely sure of : I know that when the reaction wheel ...
1
vote
2answers
58 views

Are there any modern cubesats or smallsats that have relied only on magnetotorquers for attitude control?

This comment got me thinking... Question: Are there any modern cubesats or smallsats that have relied only on magnetotorquers for attitude control, sans reaction wheels or thrusters? Ideally an ...
8
votes
2answers
691 views

Could Magnetorquers be used on the ISS?

The way that the ISS manages it's attitude now is to use a set of reaction wheels for primary control, and occasionally firing small thrusters to allow the wheels to despin themselves. This isn't ...
8
votes
1answer
207 views

Have Magnetorquers been used anywhere outside of the Earth?

On Earth, small satellites often include Magnetorquers. A magnetorquer allows the satellite to re-orient itself without using fuel in a way more permanent than magnets. While not every planet has a ...
4
votes
1answer
395 views

Relation between air-core and ferromagnetic solenoid -core magnetorquers and measurement of dipole moment

I am going to be using air coil magnetorquers for a satellite development project. These air coil magnetorquers come embedded in solar panels. I am currently using this magnetorquer , it's a solar ...
7
votes
1answer
259 views

Could a magnetorquer be used in orbit around Mars?

One way to align a spacecraft into a certain manner while in orbit around a body is the use a Magnetorquer. Does Mars have enough of a magnetic field to allow such a device to operate?
3
votes
1answer
52 views

Have magnetotorquers ever been used to spin-up a satellite?

Magnetotorquers are often used for momentum dumping of reaction wheels in smallsats, and they can use them as well for attitude control directly, per answers to Are there any modern cubesats or ...