The Experts below are selected from a list of 1980 Experts worldwide ranked by ideXlab platform
Shyam M Sundar - One of the best experts on this subject based on the ideXlab platform.
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ultra low power scheming of an efficient shift register by means of pulsed latch
International Journal of Research, 2016Co-Authors: Shyam M SundarAbstract:Shift registers are usually used in lots of applications, such as digital filters and communication receivers. In the recent times, as size of image data maintain to increase because of high demand in support of high quality image data, word length of shift register increases for processing huge image data within image processing Integrated circuits. As the recent trends mandate low power design automation on particularly vast scale for matching the trends of power consumption of the present days as well as future integrated chips. We introduce a low-power as well as area-efficient shift register by means of pulsed latches which is an important solution intended for small area as well as low power consumption. Area as well as power consumption are reduced in the proposed system by replacing flip-flops by means of pulsed latches. The proposed system saves area and power when compared to traditional shift register with flip-flops. The shift registers lessen number of delayed pulsed clock signals significantly, though it increases number of latches because of additional temporary storage latches
Thulimilli Prem Bosco - One of the best experts on this subject based on the ideXlab platform.
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design of pulsed latch based shift register with reduced power and area
International Journal of Research, 2017Co-Authors: Ch Satya Sagar, Thulimilli Prem BoscoAbstract:Power consumption and Area reduction is a major role in sequential circuit design .A novel approach to design a pulsed latch based shift register with reduced area and power is proposed.. In this the, conventional data Flip flops are replaced with pulsed latches to reduce area occupation .This method solves the timing problem between pulsed latches through the use of multiple non-overlap delayed pulsed clock signals instead of the conventional single pulsed clock signal. In the existing system, shift register uses single pulsed clock signal for data transition, which consumes more power. The shift register uses a small number of the pulsed clock signals by grouping the latches to several sub shifter registers and using additional temporary storage latches. To minimize power consumption multiple non overlap delayed pulsed clock signal scheme is proposed for data synchronization in a multi bit shift register. The proposed system will be carried out using Tanner T- Spice.
Yiqiang Wang - One of the best experts on this subject based on the ideXlab platform.
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reliability analysis and improvement of atcs of cnc Lathes
Applied Mechanics and Materials, 2010Co-Authors: Yiqiang Wang, Xiao Jun Wang, Shun Ming HuaAbstract:An automatic tool changer (ATC) is one of the most important subsystems of a computerized numerical control (CNC) lathe. The field failure analysis is very important to improve the reliability of the ATC. The structure and mechanism of an ATC is briefly introduced. Its brief reliability block diagram is set up. With this understanding, through the collection of the field failure data, a coding system to code failure data is devised and a failure analysis database of CNC Lathes is accrued. The failure mode and cause are analyzed to indicate the weak subsystem of the ATC. Some suggestions on improving the reliability have been proposed.
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failure probabilistic model of cnc Lathes
Reliability Engineering & System Safety, 1999Co-Authors: Yiqiang Wang, Yazhou Jia, Yuhua ZhengAbstract:Abstract A field failure analysis of computerized numerical control (CNC) Lathes is described. Field failure data was collected over a period of two years on approximately 80 CNC Lathes. A coding system to code failure data was devised and a failure analysis data bank of CNC Lathes was established. The failure position and subsystem, failure mode and cause were analyzed to indicate the weak subsystem of a CNC lathe. Also, failure probabilistic model of CNC Lathes was analyzed by fuzzy multicriteria comprehensive evaluation.
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field failure database of cnc Lathes
International Journal of Quality & Reliability Management, 1999Co-Authors: Yiqiang Wang, Yazhou JiaAbstract:To assess and improve the reliability of computerized numerical control (CNC) Lathes, it is essential to collect field failure information throughout the products’ life and perform analysis on these data. This paper describes the collection of field failure data, codification of data and establishment of the field failure database for CNC Lathes and gives some examples of the kind of analysis possible when sufficient data have been collected and the database has been accrued.
Shun Jia - One of the best experts on this subject based on the ideXlab platform.
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An investigation into reducing the spindle acceleration energy consumption of machine tools
Journal of Cleaner Production, 2017Co-Authors: Jingxiang Lv, Wangchujun Tang, Yingfeng Zhang, Renzhong Tang, Ying Liu, Shun JiaAbstract:Machine tools are widely used in the manufacturing industry, and consume large amount of energy. Spindle acceleration appears frequently while machine tools are working. It produces power peak which is highly energy intensive. As a result, a considerable amount of energy is consumed by this acceleration during the use phase of machine tools. However, there is still a lack of understanding of the energy consumption of spindle acceleration. Therefore, this research aims to model the spindle acceleration energy consumption of computer numerical control (CNC) Lathes, and to investigate potential approaches to reduce this part of consumption. The proposed model is based on the principle of spindle motor control and includes the calculation of moment of inertia for spindle drive system. Experiments are carried out based on a CNC lathe to validate the proposed model. The approaches for reducing the spindle acceleration energy consumption were developed. On the machine level, the approaches include avoiding unnecessary stopping and restarting of the spindle, shortening the acceleration time, lightweight design, proper use and maintenance of the spindle. On the system level, a machine tool selection criterion is developed for energy saving. Results show that the energy can be reduced by 10.6% to more than 50% using these approaches, most of which are practical and easy to implement.
Stanislaw Zietarski - One of the best experts on this subject based on the ideXlab platform.
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system integrated product design cnc programming and postprocessing for three axis Lathes
Journal of Materials Processing Technology, 2001Co-Authors: Stanislaw ZietarskiAbstract:Abstract New three-axis CNC turning machines have been installed on shop floors of factories in the last few years. Although the machines are still particularly adapted to cylindrical work, they are also used for non-cylindrical machining. The third axis, C or Y , and separately driven, additional milling cutters have eliminated traditional limitations and opened new machining possibilities, i.e. turning and milling the non-rotational shapes. Even the advanced, integrated CAD/CAM systems do not support the milling and turning processes on three-axis CNC Lathes or turning centers. Manual part programming for such machine tools, if available, does not facilitate the integration between design and manufacturing. For accurate part programming on three-axis Lathes a new interpolation scheme must be applied, using both spiral segments of Archimedes and circular segments rather than linear segments as applied in CNC milling. Specialized, built-in software developed for the three-axis Lathes enables to expand CAD/CAM integration to the same extent as in CNC multi-axis milling. The software includes modified postprocessors for three-axis Lathes as well. The integrated processes of design and manufacturing are the most important prerequisites for effective concurrent engineering. In general, it means both better economics and quality of complex products, e.g. shaped rolls for rolling operations, cams and camshafts (non-ruled surfaces included), non-rotational shafts, airscrews, prostheses for total hip replacements, etc.
