Experimental results of the hierarchical controller for the velocity trajectory tracking task show good performance and robustness against the uncertainties associated with different system parameters. The switched implementation of the hierarchical average controller is accomplished by means of pulse width modulation. In order to experimentally verify the hierarchical controller performance, a DS1104 electronic board from dSPACE and Matlab-Simulink are used. Then, a low level control is designed to ensure that the output voltage of the DC/DC Buck converter tracks the voltage profile imposed by the high level control. The high level control provides a desired voltage profile for the DC motor to achieve the tracking of a desired angular velocity trajectory. The high level control is related to the DC motor and the low level control is dedicated to the DC/DC Buck converter both controls are designed via differential flatness. Hierarchical Velocity Control Based on Differential Flatness for a DC/DC Buck Converter-DC Motor Systemĭirectory of Open Access Journals (Sweden)įull Text Available This paper presents a hierarchical controller that carries out the angular velocity trajectory tracking task for a DC motor driven by a DC/DC Buck converter. The proposed converter utilizes only one active switch and can step-up/down the input voltage, while the existing single switch quadratic buck/boost converters can only work in step-up or step-down mode. Soltani, MohsenĪ novel quadratic buck-boost DC/DC converter is presented in this study. To the knowledge of the authors, this work represents the first fully decentralized strategy for switch interleaving of paralleled dc-dc buck converters.Ī Novel Single Switch Transformerless Quadratic DC/DC Buck-Boost Converter By virtue of the intrinsic electrical coupling between converters, the nonlinear oscillator-based controllers converge to an interleaved state with uniform phase-spacing across PWM carriers. Each controller is fully decentralized, i.e., it only requires the locally measured output current to synthesize the pulse width modulation (PWM) carrier waveform. The proposed method is based on the digital implementation of the dynamics of a nonlinear oscillator circuit as the controller. We present a decentralized control strategy that yields switch interleaving among parallel connected dc-dc buck converters without communication. Johnson, Brian B [National Renewable Energy Laboratory (NREL), Golden, CO (United States) Rodriguez, Miguel [National Renewable Energy Laboratory (NREL), Golden, CO (United States) Sinha, Mohit [University of Minnesota Dhople, Sairaj [University of Minnesota Poon, Jason [University of California at Berkeley Other software tweaks coming in a fall update will bring a personalized "What to Watch" section on iOS, better social sharing on Facebook and Twitter, and a slicker OnePass experience for TiVo Online - but those aren't the features that piqued my interest.Decentralized Interleaving of Paralleled Dc-Dc Buck Converters: PreprintĮnergy Technology Data Exchange (ETDEWEB) The menu has been tweaked slightly, and while that change won't be copied onto older hardware, Premiere and Roamio users can expect a guide update that adds more channel logos. That's an odd omission, but we expect it will be corrected quickly, now that Bolt is going all-in on HTML5-based apps. ![]() At launch, it doesn't have a Hulu Plus app at all. ![]() ![]() What we didn't get a chance to try was the Bolt's Ultra HD chops, but according to TiVo it will have two 4K-ready apps at launch: YouTube and Amazon Netflix. Many of you told us you listened to the old HD Podcast that way, and we can confirm, if you're bingeing on a series to catch up before the finale, it makes things go by faster without seriously compromising the experience. In that same vein, TiVo is also adding QuickMode (unlike SkipMode, this will be available for the Roamio and Premiere), which lets viewers watch recordings sped up by 30 percent, but pitch corrects the audio so it doesn't sound any different. TiVo's scheme covers the lions share of our primetime TV programming, and being able to easily skip commercials can make it easier to blow through shows quickly. We tried it out and everything worked without a hitch.
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