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This paper presents a physics-based control-oriented model for general floating offshore wind turbines that contains as many as six platform degrees of freedom (DOFs) and two drivetrain DOFs. The model is derived from the first principles, and therefore, can be manipulated by its real physical parameters while maintaining accuracy across the highly nonlinear operating range of floating wind turbine...
A modeling method for RF power transistor fingers and large discrete die is presented in order to evaluate, visualize, and optimize various performance parameters at the device finger level. The model is constructed using a combination of TCAD based active die model and passive interconnect models based on Wheeler's transmission line formulation. Active die model of a fraction of the total periphery...
With the cross regional interconnection of the power grid, it is more and more inconsistent with the actual development of the power grid to use a single sandpile to simulate the power grid. The multi-sandpile model is developed to simulate the evolution process of the whole power grid failure in the form of all the single sandpiles evolving synchronously. First of all, the modeling method of multi-sandpile...
We developed a high-current-density, point-of-load (POL) converter for high performance Field Programmable Gate Array (FPGA) used in telecommunications systems. We applied the model-based development (MBD) method to realize the high-current density converter. Model in the loop simulation (MILS) was applied for precise loss analysis of the converter. The rapid control prototyping process (RCP) was...
For the nonlinearity of the switched reluctance motor (SRM) and robustness of sliding mode observer, a novel sensorless control system of SRM is presented based on the sliding mode observer (SMO) in the paper. Combine with the simplified flux linkage model, and optimize sensorless control system. At last, the sensorless simulation model of SRM(1.5kw, 12/8 three-phase) was built using MATLAB/SIMULINK,...
Thermal circuit models are based on the analogy between heat transfer and current flow equations. A thermal circuit model is extracted from a solid model of the package assembly by means of a mathematical model order reduction (MOR) algorithm. This algorithm automatically generates a SPICE netlist that can be used with standard analog circuit simulator, for simulation of transient operating conditions...
This paper represents the thermal behavior of a lithium-ion capacitor. In this study, an extended parameter analysis has been realized for observing the thermal behavior when applying dedicated load profiles. Based on the performed analysis, an electro-thermal model and a 3D thermal model have been developed for future optimization of a thermal strategy. The model has been implemented using COMSOL...
In this paper, the utilization of stretching strain that exists in clamped-clamped beam structures is investigated as a main source for energy harvesting from vibrations using a piezoelectric material. This technique eliminates the need for a substrate material, and reduces the electrodes configuration complexity, thus simplifies the fabrication process. This structure exhibits nonlinear dynamics...
Understanding the true nature of viscoelastic behaviors in multi-physical systems has always been a challenging issue in the system dynamic investigations, as each existing physical subdomain of the system may follow a different attenuation pattern during the dynamic process. In this study, to generate a viscoelastic model suitable for multi-physical domain dynamic investigations, a physical combined...
With the current scientific knowledge, there is no medical device which can handle continuous infusion cancer therapy. Hence, only a quasi continuous infusion therapy can be achieved using discrete drug administration (which can be sufficiently frequent). Therefore, a discrete time control has to be designed for a tumor growth model for real-life application. We designed state feedback control, augmented...
The paper presents the research of dynamic loading capacity of the tipper car body supporting structure with mathematical model methods using solid-state car dynamic model and finite-element model of the car body supporting structure. Constructive solutions are proposed for the improvement of the car body supporting structure according to the results of studies.
With the increase in driver assistance systems, driver models are becoming more important to vehicle control, safety, and performance. To enhance these driver assistance systems, the driver models need to be able to replicate human driving behaviors and distinguish among different drivers. In this paper, a combined driver model consisting of a compensatory transfer function and an anticipatory component...
The paper presents an approach towards tracking and recognizing a set of predefined hand gestures from monocular image sequences. Firstly, a behavioral model of basic hand postures was depicted by mathematical expressions. Secondly, a behavioral model for hand posture tracking and hand posture tracking algorithm based on the behavioral model of hand postures were proposed. Finally, the proposed algorithm...
A new time-domain time-invariant periodic nonlinear behavioral model for multi-port systems is formulated from first principles in this paper. Unlike frequency-domain behavioral models like the Poly-Harmonic Distortion (PHD) model that describe the output frequency spectral components of the system, this black-box approach provides a time-invariant map of the discrete-time representation of the input...
An empirical large-signal model for high-power Gallium Nitride (GaN) high electron-mobility transistors (HEMTs) is presented in this paper. This model improves the trapping effects of Angelov model. It is target for power amplifier CAD design. Power amplifier generates high power density which causes temperature rise in the channel called. This self-heating effect is implemented in our model. In addition,...
Numerical model based finite element method is adopted to find the optimum thickness of remotely operated vehicle frame made of polypropylene having stress and displacement as a criteria. Frame is the base for remotely operated vehicle. Thin polypropylene plates are arranged to have the structure, which hold the components of remotely operated vehicle. The vertical and horizontal plates are connected...
In this paper, the ridge-loaded helix slow-wavestructure (SWS) used in microwave power module (MPM) is presented. Based on the finite vane model, the loaded ridge and the support rod in ridge are equalized to the sector waveguides with regard to the helix tape thickness. The dispersion characteristic equation is newly derived. The calculation results meet the measurements very well.
This study investigates the validity of two non-invasive arterial pulse waveforms as viable indirect surrogates of arterial blood pressure waveforms, by conducting a data-driven modeling analysis of arterial wave propagation. Using the so-called “tube-load” model, we examined how well the relation between carotid versus femoral tonometry waveforms as well as carotid tonometry versus ankle pulse volume...
A computational left ventricle model simulating the physiological effects of heart failure has been designed in order to improve physician choice of intervening medical treatment for patients suffering from heart failure.
Roll-to-roll systems handling web material such as papers, polymers, textiles or metals are very common in the industry. Web handling systems are recently used to produce new technologies such as printed semi-conductors, thin solar panels, printed electronics, etc. In web handling systems, one of the main objectives is to reach a good accuracy of web tension and web speed. For the tuning of machineries,...
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