CAJ | 학술논문

嵌入式系统的节能问题是系统设计中的热点.在保证系统整体控制性能的前提下达到尽可能低的能耗,一直是嵌入式控制系统中能量管理的目标.由于诸多不确定性因素和负载的动态变化,嵌入式系统总是运行在不可预期的开放环境中.为了有效处理CPU负载变化及控制任务执行时间不确定等问题,提出了一种基于模糊逻辑的能量觉察反馈调度方法.反馈调度器动态调节CPU的处理速度,实现对CPU利用率的有效控制,从而提供了一种有效的能量管理机制.通过仿真实验与常规动态电压调整方法、传统方法以及理想情况进行比较,验证了该反馈调度方法的有效性.
감입식계통적절능문제시계통설계중적열점.재보증계통정체공제성능적전제하체도진가능저적능모,일직시감입식공제계통중능량관리적목표.유우제다불학정성인소화부재적동태변화,감입식계통총시운행재불가예기적개방배경중.위료유효처리CPU부재변화급공제임무집행시간불학정등문제,제출료일충기우모호라집적능량각찰반궤조도방법.반궤조도기동태조절CPU적처리속도,실현대CPU이용솔적유효공제,종이제공료일충유효적능량관리궤제.통과방진실험여상규동태전압조정방법、전통방법이급이상정황진행비교,험증료해반궤조도방법적유효성.
Energy conservation is an important issue for embedded systems" design.Using energy consumption as low as possible to obtain the overall system's quality of control is always an objective of energy management in embedded control system.Due to the dynamic changes of some uncertainties and workload,the embedded systems usually run in unexpected open environments.In order to effectively deal with the change of CPU workload and uncertain execution time of the control tasks,a feedback scheduling technique based on fuzzy logic for power-aware systems is designed.The feedback scheduler,which adjusts the CPU processing speed dynamically and controls the CPU utilization effectively,provides an effective method for energy management mechanism.The simulation results highlight that the proposed scheduling technique is an effective method in comparison with general Dynamic Voltage Scaling(DVS) technique,traditional scheduling technique and ideal case.