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how to use KALMAN wit accelerometer ?
hi
I found an article that shows how to use kalman filter to models error of accelerometer. they used markov process as stochastic error, then output of this model will be used as input of KALMAN filter.

Now, I don't what to do. I'm not sure, but I think that I need to double integrate the...

how to use KALMAN wit accelerometer ?
Limit as x tends to infinity, without Laurent
1. The problem statement, all variables and given/known data
I want to find the following limit, ## lim_{x rightarrow infty } x( sqrt{ x^{2} +9} -x) ##, without using the Laurent series
2. Relevant equations
None.

3. The attempt at a solution
I used the Laurent Series...

Limit as x tends to infinity, without Laurent
Represent Action of Stern Gerlach Operator as a Matrix
1. The problem statement, all variables and given/known data

Given the series of three Stern-Gerlach devices:

[​IMG]

Represent the action of the last two SG devices as matrices ##hat{A}## and ##hat{B}## in the ##|+zrangle, |-zrangle## basis....

Represent Action of Stern Gerlach Operator as a Matrix
Three phase induction motor efficiency
Hi,

Is there a difference in efficiency between a three phase motor and a single phase motor, in terms of power in against power out. If so, could you please explain why one is more efficient than the other.

The reason I ask is because I'm researching the development of the induction motor for...

Three phase induction motor efficiency
Why isn't current negative in this example?
1. The problem statement, all variables and given/known data
The figure gives the electric potential V(x) along a copper wire carrying uniform current, from a point of higher potential Vs = 9.00 μV at x = 0 to a point of zero potential at xs = 3.20 m. The wire...

Why isn't current negative in this example?
torque needed to mantain a disk rotating
Hello, first post!

I'd apreciate some help on finding out the calculus for knowing the motor's torque needed for mantaining 2 vertical disks ø46cm, 30kg each at 300rpm, taking into acount 3 generic bearings friction that hypotetically is 0.5Nm friction torque

I'm having some trouble trying to...

torque needed to mantain a disk rotating
Missing alerts
Every now and then the forum stops giving me alerts from new posts in the watched threads. Once I viewed the thread, manually so to speak, the alerts start coming again.

I'm not sure whether it's an issue with the forum or maybe with something on my end. I'm on Firefox (34.0.5), windows 7.
How to find Best Efficiency Point for pumps in series?
1. The problem statement, all variables and given/known data
I read here http://www.engineeringtoolbox.com/pump-system-curves-d_635.html
that this is where the system curve and the pump performance curve intersect.

But if the situation involves pumps in series, what will the...

How to find Best Efficiency Point for pumps in series?
Electrostatic repulsive force between parallel plates
Hi

I was thinking about two parallel plates with same charges (there's no electrical field between them). How can we calculate the repulsive force? Does anyone have any ideas besides numerical integration?

Thanks
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