Torque ripple is a defect of switched reluctant motors. DITC (direct instantaneous torque control) harnessed to solve the problem as traditional method, which superior TSF (torque sharing function). In this paper, new controller proposed with modified hysteresis and PWM in DITC. With algorithm, error will be reduced The algorithm effective improve sample 0 status period. based on application ze...

Currently, FPGA (Field Programmable Gate Array) technology is being widely used for accelerator control owing to its fast digital processing capability. We have recently developed a high-speed data acquisition system that combines a commercial FPGA board (ML555) with a fast ADC (ADS5474; 14 bit; maximum sampling rate: 400 MS/s; bandwidth: 1.4 GHz). This system enables direct measurements of 1.3...

successful endodontic therapy depends on adequate mechanical and chemical debridement of the canal which requires knowledge of the canal morphology. conventional radiography has been used to evaluate the canal type; however, direct digital radiography has recently been practiced for this purpose due to the shortcomings of conventional radiography. the aim of the present study was to compare the...

Integration of new generation digital beam position monitor (DBPM) was performed recently. The BPM electronics are commercial available by using direct RF sampling technology, FPGA, and embedded control environment running GNU/Linux. The implementation is emphasized on control system integration and compatible with existing system to enhance functionality and performance of the BPM system. The ...

objective: diagnosis of vertical root fractures (vrfs) is critical in endodontics which most of the times occurs in endodontically treated teeth with root canal fillings such as gutta percha. despite cone beam computed tomography (cbct) has significantly enhanced image quality compared to digital radiography (dr) which aid the diagnosis, artifacts has remained as a problem in vrf detection . th...

Background and Purpose:  Due to the important role of imaging in the diagnosis and treatment plan in orthodontics, CBCT (Cone Beam Computed Tomography) images because of their three-dimensional nature, can minimize the disadvantages of two-dimensional images such as magnification, distortion, or superimposition. The purpose of this study was to evaluate the accuracy of conventional cephalograms...

An optical interconnection system is being developed to provide vertical, digital data channels for stacked multichip modules. A key component of the system is an array of individually addressable verticalcavity surface-emitting lasers with diffractive lenses integrated into the substrate to control beam divergence and direction. The lenses were fabricated by direct-write e-beam lithograpliy an...