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对具有可动态独立调整运行频率/电压的多功能部件配置结构M,基于全局调度的循环依赖关系,使用ILP形式化框架,研究了对给定循环L进行动态频率/电压调整的低功耗软件流水调度的编译优化技术.提出了一种合理而有效的低功耗最优化软件流水调度方法,使其在运行时保持性能不变而消耗的功耗/能量最小. 相似文献
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In this paper, we have proposed an efficient method for integrating longer pipeline coprocessors with SPARCv8 compliant processor implementations that requires minimum changes in the existing processor pipeline. The proposed integration method is independent of the length of the coprocessor pipeline. We have used COordinate Rotation DIgital Computer (CORDIC) core as the coprocessor that has been integrated with SPARCv8 based LEON3 processor. Only a subset of the coprocessor instructions defined in the Instruction Set Architecture (ISA) are required in our proposed method. The required synchronisation of data and control signals between the coprocessor and LEON3 pipeline has been presented in detail. The performance of the resulting closely-coupled design is compared with bus-based integration in terms of speed, power and area in the System-on-Chip (SoC) design, and both FPGA and ASIC results are reported. Our proposed integration method shows significant improvements over bus-based method for applications that require consecutive coprocessor operations in terms of CPI metric along with substantial reduction in number of cycles. Similar strategy can be employed for integration with coprocessors having different pipeline lengths. 相似文献
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近年来航天器整体技术发展迅速,对电源系统的轻质小型化要求越来越高;传统的功率电源系统储能单元采用蓄电池组或贮备电池,由于脉冲类负载存在脉冲电流用电的工作特性,在储能单元设计时通常采用增加电池设计容量的方式来满足脉冲类负载供电要求,导致功率电源系统轻质小型化设计受到限制;提出一种新型功率电源系统方案设计思路,引入超级电容器与蓄电池组联合供电输出,充分发挥超级电容器大脉冲放电的优势,有利于实现航天器功率电源系统轻质小型化,具有一定的应用前景。 相似文献
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Low power consumption and high computational performance are two important processor design goals for IoT applications. Achieving both design goals in one processor architecture is challenging due to their conflicting requirements. This paper introduces a reconfigurable micro-architectural level technique that allows a Reduced Instruction Set Computing (RISC) processor to support IoT applications with different performance and energy trade-off requirements. The processor can be reconfigured into either multi-cycle execution mode (low computational speed with low dynamic power consumption) or pipeline execution mode (high computational speed at the expense of high dynamic power), based on dynamic workload characteristics in IoT applications. Switching between modes is accomplished by exploiting the partial reconfiguration (PR) feature offered by the recent advancements in modern FPGAs. A RISC processor was designed based on the proposed micro-architectural level technique and implemented on FPGA as IoT sensor node. Experimental results demonstrate that the proposed technique with reconfigurable micro-architecture is able to significantly reduce the dynamic energy consumption, compared to conventional multi-cycle and pipeline only micro-architectures, while allowing better performance-energy trade-off in IoT applications. 相似文献
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Establishing and operating an oilfield surface pipeline system involves a large capital expenditure, which includes pipeline cost, power consumption cost, and thermal energy cost, etc. In this process, there exists a vast amount of fuzzy information, in both the objective and the constraint functions for an optimal design. System design based on such a huge volume of fuzzy information about multi-objectives and multi-constraints cannot be well handled by conventional mathematical tools. In this paper, a mathematical model from the fuzzy optimization approach is formulated for such oilfield surface pipeline systems. Both the multi-objective and multi-constraint functions are defined in a feasible fuzzy domain within the design parameters space. An optimal solution is selected from this domain for the design, for which the degree of expert satisfaction reaches the maximum. The methodology presented in this paper offers a new approach and a significant improvement of cost savings in the establishment and operation of an oilfield surface pipeline network system, beneficial for the oil industry. 相似文献
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流水线的FPGA低功耗设计① 总被引:2,自引:0,他引:2
在组合逻辑中加入寄存器级形成流水线,减少了信号毛刺的产生和传播,从而降低FPGA动态功耗,通过XPower功耗分析工具总结出了流水线设计和非流水线设计的功耗,为了做出更完整的对比,使用了低翻转率信号,随机翻转率信号和高翻转率信号作为输入,最后得出结论,对于高翻转率的信号,使用流水线可以一定程度的降低FPGA的功耗,对于低翻转率的信号,使用的流水线可能会使用比非流水线更多的功耗,并分析了其原因。 相似文献
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针对当前原油管道传输过程中存在的漏油现象和能源浪费等问题,提出了一种基于B/S模式的原油管道实时安检系统,系统实现了管道数据监测,管道测漏,节能模型和结蜡模型。详述了系统设计、数据库的设计和系统实现主要技术。该系统界面友好,通信稳定,监测实时,且精度高,真正的实现了监测自动化,提高了企业的管理自动化水平。 相似文献
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Ender Yüksel Hanne Riis Nielson Flemming Nielson Huibiao Zhu Heqing Huang 《International Journal on Software Tools for Technology Transfer (STTT)》2014,16(4):421-435
Cyber-physical systems integrate information and communication technology with the physical elements of a system, mainly for monitoring and controlling purposes. The conversion of traditional power grid into a smart grid, a fundamental example of a cyber-physical system, raises a number of issues that require novel methods and applications. One of the important issues in this context is the verification of certain quantitative properties of the system. In this paper, we consider a specific Chinese smart grid implementation as a case study and address the verification problem for performance and energy consumption. We employ stochastic model checking approach and present our modelling and analysis study using PRISM model checker. 相似文献
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Present technology in structure design (smart structures, civil structures and aerospace structures) includes the use of feedback control. While retrofitting such active elements can be useful in existing structures, future designs will require something more than retrofitting technology. Future technology will certainly require a more systematic integration of the design of a structure and its active elements. This paper provides a step in that direction. We seek to integrate the design of the structure with its active elements to achieve mixed H2/H performance for the controlled structural system (closed loop system). More specificaly, the approach presented here solves a mixed passive control (structure design) and active control (feedback control law design) problems with performance characterized by system norms such that H performance bounds are guaranteed with les active energy. This approach al ows us to answer the question 'what is an optimal distribution of mass, stiffness, damping and control energy throughout a structure?' The main conclusion drew in this paper is that control design tools can be useful for structure design. 相似文献
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《Robotics & Automation Magazine, IEEE》2008,15(3):8-9
Exciting new robots are being developed that will operate in a different environment from traditional industrial factories or research laboratories. Researchers are working worldwide to create robots that are integrated into our daily lives. For the advancement of these new robots, compliant, safe, and new actuators are one of the important issues turning energy into safe motion. The biological counterpart is the muscle tendon structure that has functional performance characteristics and a neuromechanical control systemthat has far more superior capabilities. The superior power to weight ratio, force to weight ratio, and sensing characteristics limit the development of machines that can match motion, safety, and energy efficiency of a human or other animal. One of the key differences of biological systems is their adaptable compliance or variable stiffness compared with the traditional stiff electrical drives used for the standard industrial robotic applications, which require accurate, reference-trajectory tracking.More and more applications such as robots in close human or robot proximity, legged autonomous robots, and rehabilitation devices and prostheses demand a different set of design specifications, for which the use of compliant actuators can be beneficial as compared with the traditional stiff actuation schemes. 相似文献
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针对传统技术中采用电磁式CT互感器存在的不足,提出了适用于10 kV的无源电子式电压互感器。根据电压互感器的工作原理,介绍了10 kV无源电子式电压互感器在电能表检定装置方面的意义。进一步分析了无源电子式电压互感器在电力设备中应用的重要性和必要性,该技术能够有效地避免传统技术在电力线路信号传输和处理时带来附加误差,大大提高电能计量、保护和测量系统的精度,推进了电力系统朝向数字化、电子化、自动化、网络化的方向发展。实验表明,采用10 kV的无源电子式电压传感器与传统CT互感器相比,误差精度提高了10%以上。 相似文献
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“LongtiumC2”微处理器流水线设计 总被引:2,自引:1,他引:1
介绍一款32位CISC结构微处理器“LongtiumC2”的流水线设计。针对CISC结构微处理器流水线设计的难点,采用微指令流水执行等技术,设计了“LongtiumC2”的7级流水线结构,以及与流水线相关的处理机制和精确中断的实现机制,实现了一个具有较高性能的CISC微处理器的流水线。仿真和综合结果表明,该流水线设计能够满足“LongtiumC2”微处理器的功能和性能要求。 相似文献
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传统的流水线设计是以转移指令为中心的,大量逻辑资源被用于提高处理器转移预测的能力,以保证向流水线发射和执行部件提供充足的指令流。在阵列众核处理器中提出了一种以访存为中心的核心流水线设计。通过提高访存装载指令在流水线中的执行优先级,以及访存装载指令的预测执行机制,可以有效减少顺序流水线因访存延迟所带来的停顿,提高流水线性能和能效比。测试结果表明,以4KB容量的装载指令访存地址表为例,访存为中心的流水线设计可以带来8.6%的流水线性能提升和7%的流水线能效比提高。 相似文献
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为推动燃气行业信息化、自动化管理,设计并实现了以GIS、GPS、RS技术为核心,整合SCADA系统、GPS巡线系统、GIS系统的燃气管网4S系统。建立城市燃气实时信息化服务体系,实现燃气管道信息实时监控与发布,以及燃气管网数据的存储与燃气管网信息的检索功能,以高效移动巡检代替传统低效巡检方式。通过一段时间运行使用,系统运行稳定,展现了良好的交互性与较强的拓展性,能够较好地满足燃气行业生产运营需要,使燃气管网输配调度及安全运营更加科学合理。 相似文献
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目前城市的地下管线错综复杂,传统的人工管理方式已不能满足行政管理部门的决策和各专业管线单位的管理需要。为此文章在对地理信息系统研究的分析的基础上,分析了地下管理系统的开发模式和实现技术,确定了基于GIS组件二次开发的控件和算法,设计并实现了城市地下管线信息系统,在实际的应用中取得了较好的效果。 相似文献