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Academic literature on the topic 'DAQ-6211'
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Journal articles on the topic "DAQ-6211"
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Mahmoud, Mostafa, Ahmed El-Biomey, and El-sayed Soliman Ahmed. "Relative stability enhancement for brushed DC motor using a PLL interfaced with LabVIEW." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 2 (2020): 735. http://dx.doi.org/10.11591/ijpeds.v11.i2.pp735-742.
Full textAbstract:
This work presents a fast response and stable computer based a brushed DC motor speed controller. The controller configured of gate drive circuits for H-Bridge accompanied with data acquisition unit DAQ-6211. These gate drive circuits include, phase comparator, current booster and wave forms cleaning circuits. An optical encoder is used for motor speed to frequency conversion. The CD4046 PLL chip compares phases of the encoder output frequency (motor speed) with a reference frequency (desired speed). The obtained phase difference (error) is used to allocate the suitable PWM duty cycles. An H-Bridge BJT switches driven by PWM is interfaced with the motor. The system hardware is provided with a simple and accurate data acquisition unit DAQ-6211 to be interfaced with the LabVIEW software Package. This allows monitoring and storing the different measured data of this platform. The system relative stability is determined and examined based on the Bode plot analysis and design. Then the relative stability criterion (Phase Margin) is measured the closed-loop stability of the system. This system considers the fast feedback response with indication of its stability state as well as the stable wide dynamic range. It compensates the changes in system parameters due to the environmental effects and other disturbances.
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Mostafa, Mahmoud, El-Biomey Ahmed, and Soliman Ahmed El-Sayed. "Relative stability enhancement for brushed DC motor using a PLL interfaced with LabVIEW." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 2 (2020): 735–42. https://doi.org/10.11591/ijpeds.v11.i2.pp735-742.
Full textAbstract:
This work presents a fast response and stable computer based a brushed DC motor speed controller. The controller configured of gate drive circuits for HBridge accompanied with data acquisition unit DAQ-6211. These gate drive circuits include, phase comparator, current booster and wave forms cleaning circuits. An optical encoder is used for motor speed to frequency conversion. The CD4046 PLL chip compares phases of the encoder output frequency (motor speed) with a reference frequency (desired speed). The obtained phase difference (error) is used to allocate the suitable PWM duty cycles. An H-Bridge BJT switches driven by PWM is interfaced with the motor. The system hardware is provided with a simple and accurate data acquisition unit DAQ-6211 to be interfaced with the LabVIEW software Package. This allows monitoring and storing the different measured data of this platform. The system relative stability is determined and examined based on the Bode plot analysis and design. Then the relative stability criterion (Phase Margin) is measured the closed-loop stability of the system. This system considers the fast feedback response with indication of its stability state as well as the stable wide dynamic range. It compensates the changes in system parameters due to the environmental effects and other disturbances.
3
Jayaram, Sabavath, Cristiano Maria Verrelli, and Nithya Venkatesan. "AGTM Optimization Technique for Multi-Model Fractional-Order Controls of Spherical Tanks." Mathematics 13, no. 3 (2025): 351. https://doi.org/10.3390/math13030351.
Full textAbstract:
Spherical tanks are widely utilized in process industries due to their substantial storage capacity. These industries’ inherent challenges necessitate using highly efficient controllers to manage various process parameters, especially given their nonlinear behavior. This paper proposes the Approximate Generalized Time Moments (AGTM) optimization technique for designing the parameters of multi-model fractional-order controllers for regulating the output (liquid level) of a real-time nonlinear spherical tank. System identification for different regions of the nonlinear process is here innovatively conducted using a black-box model, which is determined to be nonlinear and approximated as a First Order Plus Dead Time (FOPDT) system over each region. Both model identification and controller design are performed in simulation and real-time using a National Instruments NI DAQmx 6211 Data Acquisition (DAQ) card (NI SYSTEMS INDIA PVT. LTD., Bangalore Karnataka, India) and MATLAB/SIMULINK software (MATLAB R2021a). The performance of the overall algorithm is evaluated through simulation and experimental testing, with several setpoints and load changes, and is compared to the performance of other algorithms tuned within the same framework. While traditional approaches, such as integer-order controllers or linear approximations, often struggle to provide consistent performance across the operating range of spherical tanks, it is originally shown how the combination of multi-model fractional-order controller design—AGTM optimization method—GA for expansion point selection and index minimization has benefits in specifically controlling a (difficult to be controlled) nonlinear process.
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"LabVIEW Based Determination of Oxygen Saturation from ECG Signals." International Journal of Innovative Technology and Exploring Engineering 9, no. 1S (2019): 369–72. http://dx.doi.org/10.35940/ijitee.a1073.1191s19.
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This research paper demonstrates the measurement of oxygen saturation (SAO2) from the ECG signal using LabVIEW 11.0 .SAO2 is the percentage of hemoglobin molecules that contain oxygen. The optimum level of SAO2 in a human being should be 92%.When it goes below 90% it causes hypoxemia (anemia). When SAO2 reduces below 65%, it will cause damage in the functioning of mental activity .When it reduces below 55% it causes unconsciousness. Hence sustaining the optimum value of SAO2 is crucial. Hence maintaining optimum level of SAO2 is important. The latest technology which utilizes pulse oximeter has its own drawbacks. To overcome these disadvantages, a new methodology by which SAO2 can be measured from ECG signals is proposed. The ECG signal from the patient is acquired by NI USB 6211 DAQ module. By determining the pulse numbers from the ECG waveform, the SAO2 level can be determined by suitable mathematical computations. Diagnostics and implementing control action can be done with the support of LabVIEW software.
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Jayaram, Sabavath, and Nithya Venkatesan. "Design and implementation of the fractional-order controllers for a real-time nonlinear process using the AGTM optimization technique." Scientific Reports 14, no. 1 (2024). https://doi.org/10.1038/s41598-024-82258-1.
Full textAbstract:
AbstractSpherical tanks have been predominantly used in process industries due to their large storage capability. The fundamental challenges in process industries require a very efficient controller to control the various process parameters owing to their nonlinear behavior. The current research work in this paper aims to propose the Approximate Generalized Time Moments (AGTM) optimization technique for designing Fractional-Order PI (FOPI) and Fractional-Order PID (FOPID) controllers for the nonlinear Single Spherical Tank Liquid Level System (SSTLLS). This system features a large dead time, and its real-time modeling generally represents a Single Input Single Output (SISO) model. However, in practice, the derived SISO model is often a First Order Plus Dead Time (FOPDT) model, necessitating an effective controller to maintain the tank’s steady-state level. In this research, the proposed AGTM method, based on the conventional Proportional Integral (PI) and Proportional Integral Derivative (PID) controllers, is compared with the FOPI and FOPID controllers for the nonlinear SSTLLS. The performance of these controllers is contrasted using metrics such as Integral Squared Error (ISE) and Integral Absolute Error (IAE), as well as time-domain characteristics containing Rise time, Peak time, Settling time, Peak overshoot, and Steady-state error. The implementation of the aforementioned controllers is done in simulation and real-time employing the MATLAB software environment and the Data Acquisition (DAQ) device National Instrument NI-DAQmx 6211. The simulation and experimental results demonstrate the exceptional performance of the designed Fractional-Order controllers based on the proposed method which offers an increased degree of freedom despite the more complex design process.
Dissertations / Theses on the topic "DAQ-6211"
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Hedlund, Jonas, and Simon Hammarström. "Design och framtagande av mätanordning för ström och effek på trefas ledare : Josi Periferi strömmeter." Thesis, Uppsala universitet, Elektricitetslära, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-257677.
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The assignment is issued by Scania Maintence AB seeking a new approach to detect power changes in their industrial processes. The work has taken place at Ångströmslaboratoriet and tests have been performed at Scania AB Södertälje. Today’s society consumes enormous amount of energy. In both economically and environmental view, it is important that the processes are effective, with high power factor. There are many ways to measure power in the industry, what they all have in common is that the installation is advanced, requires time and planning. Only a competent electrician may install the measuring device in the distribution box. The purpose of the project is to build a prototype for power measurement that can be easily used outside the distribution box, thus simplifying the procedure and shortening the time required. By attaching sensors around the supply cable, the magnetic field asymmetric flux density can be used and induce voltage proportional to the current in the cable. The result is an instrument that with a computer calculates current, phase angle and power. Measurements of the current rms value showed that the maximum difference between our prototype and Scania Maintenances equipmentis up to 29 percent. However, for a longer time (> 15 minutes) the differences between the mean values are only 1.2 percent and the accuracy is calculated to +/-3.67A with 95% confidence intervals. Phase angle accuracy measured to plus 6 minus and 15 percent.<br>Uppgiften är utfärdat av Scania Maintenance AB som söker en ny metod för att se effektförändringar i deras industriprocesser. Arbetet har ägt rum i Ångströmlaboratoriet (Uppsala universitet) och tester har utförts hos Scania AB Södertälje. Dagens samhälle förbrukar enorma mängder energi. Med hänsyn till både miljöpåverkan och ekonomi är det viktigt att processer är effektiva med höga verkningsgrader. Det finns många sätt att mäta effekt inom industrin, det de har gemensamt är att installationen är avancerad, kräver tid och planering. Endast en behörig elektriker får installera mätanordningen. Projektets syfte är att ta fram en prototyp för effektmätning som enkelt kan anmodas utanför centralen och därmed förenkla ingreppet och förkorta tidsåtgången. Genom att fästa sensorer runt ingående matningskabel kan magnetfältets asymmetriska flödestäthet utnyttjas och inducera spänning proportionell mot den ström som går i ledarna. Resultatet är ett instrument som tillsammans med en dator beräknar ström, fasvinkel och effekt. Vid mätning av strömmens effektivvärde beräknades den maximala skillnaden mellan vår prototyp och Scania Maintenances nuvarande utrustning upp till 29 %. Dock under en längre tid (> 15 min) är skillnaderna av medelvärdet endast 1.2 % och noggrannheten beräknas till 3.67A med 95 % konfidensintervall. Fasvinkelns noggrannhet beräknades till plus 6 och minus 12 %.