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Thread: Little help?

  1. #1
    MasterMind0wnz's Avatar
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  2. #2
    Victoria's Avatar
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    dafuq??

  3. #3
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    dafuq? x2

  4. #4
    Harry Potter
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    he is trying to figure out a mortgage pmt (:

  5. #5
    MasterMind0wnz's Avatar
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    Actually, this thesis demonstrates the feasibility of integrating nonparametric frequencydomain system identification functionality into digital controllers for switched-mode pulse width modulated (PWM) DC-DC power converters. The resulting discrete-time frequency response can be used for design, diagnostic or auto-tuning purposes. The success of these applications depends on the fidelity of the identified frequency responses and the degree to which the process is automated, as well as the costs, in terms of hardware resources, time duration of identification, and effects on output voltage, incurred to obtain these benefits. It is shown that relatively accurate and smooth frequency response data can be obtained using a Verilog-coded implementation with low tens of thousands of logic gates and about 10 kB of memory. The identification process can be accomplished in several hundred milliseconds and the output voltage can be kept within specified bounds during the entire process. The impact of this work is demonstrated with an integrated auto-tuning example wherein the controller determines PID controller parameters required to maximize the closed-loop bandwidth of the feedback control system while maintaining user-specified stability margins and integral-based no limit-cycling criteria as well as ensuring single crossover frequency operation and sufficiently high loop gain magnitude at low frequencies. The approach is completely automated and can be applied to a wide range of PWM DC-DC converter architectures with no changes to the identification or auto-tuning algorithms. In order to demonstrate this versatility, identification and auto-tuning experimental results are presented for seven different PWM DC-DC converters operating in voltage-mode control. These include a well-damped synchronous buck, a lightly damped synchronous buck with and without a poorly damped input filter, three different boosts operating in continuous conduction mode with with varying capacitor size and non-minimum phase zero frequency, and a boost operating in discontinuous conduction mode.

  6. #6
    Victoria's Avatar
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    You just made me feel really dumb lol

  7. #7
    Reemer's Avatar
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    Copypasta!

  8. #8
    Brainiac


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    dude, citation?

  9. #9
    Inq's Avatar
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    Quote Originally Posted by Bianca View Post
    You just made me feel really dumb lol
    Hey, don't feel dumb: it's just another language.

    Have you ever heard someone speaking a foreign language, let's say, Spanish, and thought to yourself: this person is so much more intelligent than me?

    It's true that mathematics in a language which comes native to no-one, but we all have our specialised tongues which not everybody can comprehend.

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