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Maksim231197 [3]
3 years ago
9

A common rule of thumb for controller discretization is to have "6 samples per rise time" in order to achieve a reasonable appro

ximation of the CT controller, without wasting computing resources. Derive the effect on PM that this choice will have. Also derive the relationship of this choice to the effective Nyquist rate for the closed-loop system.

Engineering
1 answer:
GrogVix [38]3 years ago
3 0

Answer:

From the derivation in the attachment below it

Is clear that discrete time receives phase response

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Why the velocity potential Φ(x,y,z,t) exists only for irrotational flow
Black_prince [1.1K]

Answer:

\omega_y,\omega_x,\omega_Z  all are zero.

Explanation:

We know that if flow is possible then it will satisfy the below equation

\dfrac{\partial u}{\partial x}+\dfrac{\partial v}{\partial y}+\dfrac{\partial w}{\partial z}=0

Where u is the velocity of flow in the x-direction ,v is the velocity of flow in the y-direction and w is the velocity of flow in z-direction.

And velocity potential function \phi given as follows

 u=-\frac{\partial \phi }{\partial x},v=-\frac{\partial \phi }{\partial y},w=-\frac{\partial \phi }{\partial z}

Rotationality of fluid is given by \omega

\frac{\partial v}{\partial x}-\frac{\partial u}{\partial y}=\omega_Z

\frac{\partial v}{\partial z}-\frac{\partial w}{\partial y}=\omega_x

\frac{\partial w}{\partial x}-\frac{\partial u}{\partial z}=\omega_y

So now putting value in the above equations ,we will find

\omega =\frac{\partial \phi }{\partial x},u=\frac{\partial \phi }{\partial x},

\omega_y=\dfrac{\partial^2 \phi }{\partial z\partial x}-\dfrac{\partial^2 \phi }{\partial z\partial x}

So \omega_y=0

Like this all \omega_y,\omega_x,\omega_Z all are zero.

That is why  velocity potential flow is irroational flow.

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4 years ago
Within a cubic unit cell, sketch the directions of [012], [721], [110].
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Answer:

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[721] :      

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[110]  :

Here z component is zero.

That is why this is  in x -y plane

From the cubic unit directions we can easily understand all given directions  [012], [721], [110].

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Define office in one sentences​
Andreyy89
Define office in one sentence.

Capitalize D in define.
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Answer:

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A large retail organization previously divided work among its four employee-benefits staff into distinct specializations. One pe
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Answer:

Sense of ownership

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Even thought the question seems incomplete or properly asked, but from the narrative thus far in the asked question, the answer suggests that the restructuring will most likely increase the employees sense of ownership which is the right answer to the question intended to ask.

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