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Discriminating exo-atmosphere micro-motion targets is a key technology for precise guidance systems, infrared surveillance systems, and satellite remote sensing systems. Commonly, static IR images are insufficient to discriminate different targets in the field of view. The infrared signature, i.e., the time sequence of the target point's gray level in the infrared images serve as potential discriminants...
Accurate modelling of photovoltaic (PV) modules is necessary to understand PV cell operation and to develop maximum power point tracking (MPPT) algorithm for efficient operation of the PV system. A variety of models are proposed in the literature that use a current source, diodes and resistors to represent a PV module. The parameter values involved in the model need to be accurately estimated to improve...
The losses of realistic litz wires are characterized while explicitly accounting for their construction, using a procedure that computes the current-driven and magnetic-field-driven copper losses using fast numerical simulations. We present a case study that examines loss variation in one- and two-level litz wires as a function of twisting pitch, over a wide range of values and in small increments...
In this paper, the stability of a parallel higher order basis based integral equation solver (HOBBIES) is analysed. The monostatic RCS from a model of 80 wavelength height and 60 wavelength width is simulated at 21 frequencies. The benchmark obtained indicates that HOBBIES takes almost the same amount of time for matrix filling and matrix equation solving for each frequency. The project is executed...
Most of the existing active control methodologies need a post-fault/failure model of the faulty process for online retuning the controller parameters, or reconfiguration. However, post-fault model identification process takes the precious post-fault time which delays the recovery procedure. A new data-driven fault tolerant model predictive control (MPC) is developed which does not need the post-fault...
The use of thermoelectric cooler (TEC) as enhanced air cooling technique for electronic generating devices has been of increasing interest. In this paper, experimental and computational studies of TEC enhanced air cooling limits are conducted. The experimental work was first conducted as a baseline study. The setup consisted of a fan-cooled heat sink, a thermal test board mounted with a test die,...
Minimization of the warpage defect is an important task in injection molding optimization. Surrogate modeling technology has been employed to address the problem of intense computation from CAE simulation runs in obtaining the warpage values. This, however, is often faced with a dilemma, in that the accuracy of the surrogate model is dependent on the number of sample points, while more sample points...
The objective of the study is to improve the aortic pressure and myocardial perfusion pressure during cardiac arrest through optimized control parameters of external force for cardiopulmonary resuscitation (CPR). The CPR technology described in this paper was active compression-decompression CPR with enhanced external counter-pulsation and inspiratory impedance threshold valve (AEI-CPR). A genetic...
Asynchronous electrical activation, induced by bundle branch block (BBB), can cause reduced ventricular function. However, effects of BBB on the mechanical function of heart are difficult to assess experimentally. Based on an electromechanical canine heart model developed recently, the mechanical properties of complete LBBB and RBBB were simulated. The geometries and myofibre orientations of ventricles...
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