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36 Cards in this Set
- Front
- Back
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What does the standard closed loop look like? |
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What is the equation for the gain of a standard negative feedback loop? |
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What is the equation for a standard positive feedback loop? |
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What is the standard form for a first order transfer function? |
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What is the standard form for a second order transfer function? |
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How to you make a system have unity feedback? |
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Why does the -1 block need to be added to make a system unity feedback? |
Since you've taken one away with the unity feedback loop, you need to add it back |
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How to you work out the SSE for a step input? |
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How do you work out the SSE for a ramp input? |
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How do you work out the SSE for a parabolic input? |
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How do you know what the system type is by looking at a transfer function? |
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When is a system unstable? |
When the amplitude of the output is increasing |
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What is the first step of the Routh-Harwitz stability criterion? |
To examine the coefficients of the denominator of the transfer function. You will then be able to tell whether the system is stable or not |
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What can you tell if all of the coefficients of the denominator are positive? |
The system is stable |
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What can you tell if one of the coefficients of the denominator is negative |
The system is unstable |
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What can you tell if one of the coefficients of the denominator is 0? |
At the very best, the system is critically stable |
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How do you work out values of the Routh-Harwitz table? |
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What is the equation for working out the asymptopic angles for a root locus? |
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What is the equation for working out the centroid location for a root locus? |
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What is the equation for working out the magnitude on a bode plot? |
20log(k) |
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What is the equation for the phase of a bode plot? |
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What is the standard form for the magnitude equation for a nyquist plot? |
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What is the standard form for the phase angle for a nyquist plot? |
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What rate does the magnitude slope decay at for a 1st order system? |
20dB per decade |
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What phase angles does a 1st order system go through at its cut off? |
-45 |
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What phase angle does a first order system end at, at infinity? |
-90 |
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What rate does the magnitude of a 2nd order system decay at? |
-40dB |
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What phase angle does a 2nd order system go through its cut off frequency at? |
-90 |
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What angle does a 2nd order system end at, at infinity? |
-180 |
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What does a gain look like on a bode plot? |
A straight line |
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What does a differentiator look like on a bode plot? |
A upwards slop increasing at 20dB per decade |
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What does an integrator look like on a bode plot? |
A downwards slope, decreasing at 20dB per decade |
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How do you work out the gain margin of a nyquist plot? |
Where it crosses the real axis |
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How to you work out the phase margin of a nyquist plot? |
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What is the laplace of the first derivative? |
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What is the laplace of the second derivative? |
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