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# Clarification of concept on Will this magnetorquer configuration effectively desaturate a reaction wheel desaturation?

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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

I know that when the reaction wheel reaches its max speed ( in terms of rpm), it becomes saturated and will have 0 acceleration. Assuming that you stop the reaction wheel motor after saturation, will the angular velocity generated by the reaction wheel still cause it to turn? I think this is true as it would then justify using magnetorquers to externally counteract this angular velocity, but I am not entirely sure.

Also, this is my current plan to desaturate the reaction wheel:

When the reaction wheel is saturated, a control signal will be sent to active a P controller with the control law : m=-Kp(href-hw) where m is the magnetic moment of the magnetorquer, hw is the momentum of the reaction wheel and href is a reference momentum. This P controller would then be connected to a magnetorquer ( Let's call the this torque tmag).

tmag would then be added into the dynamic equations for the satellite.

Would this work?

Thanks!

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 reaches its max speed ( in terms of rpm), it becomes saturated and will have 0 acceleration. Assuming that you stop the reaction wheel motor after saturation, will the angular velocity generated by the reaction wheel still cause it to turn? I think this is true as it would then justify using magnetorquers to externally counteract this angular velocity, but I am not entirely sure.

Thanks!

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 reaches its max speed ( in terms of rpm), it becomes saturated and will have 0 acceleration. Assuming that you stop the reaction wheel motor after saturation, will the angular velocity generated by the reaction wheel still cause it to turn? I think this is true as it would then justify using magnetorquers to externally counteract this angular velocity, but I am not entirely sure.

Also, this is my current plan to desaturate the reaction wheel:

When the reaction wheel is saturated, a control signal will be sent to active a P controller with the control law : m=-Kp(href-hw) where m is the magnetic moment of the magnetorquer, hw is the momentum of the reaction wheel and href is a reference momentum. This P controller would then be connected to a magnetorquer ( Let's call the this torque tmag).

tmag would then be added into the dynamic equations for the satellite.

Would this work?

Thanks!

1

# Clarification of concept on reaction wheel desaturation

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 reaches its max speed ( in terms of rpm), it becomes saturated and will have 0 acceleration. Assuming that you stop the reaction wheel motor after saturation, will the angular velocity generated by the reaction wheel still cause it to turn? I think this is true as it would then justify using magnetorquers to externally counteract this angular velocity, but I am not entirely sure.

Thanks!