针对电池放电量受到负载电流强度的影响而变化的问题,通过对电池的容量变化和动态调压技术(DVS)关系的研究,建立一种电池模型驱动的低功耗嵌入式系统设计方法.该方法在设计过程中引入电池特性,量化了DVS对电池容量的影响,从理论上建立了电池驱动的低功耗嵌入式系统设计模型,并根据模型推导出两个低功耗嵌入式系统的设计指导标准:最优速度因子和系统最优化组合因子.实验结果表明,采用电池驱动的低功耗嵌入式系统设计模型更加精准和节能,同时实验也验证了采用本模型计算的最优处理器速率是正确的,也是最优的.
The energy of the battery was affected by the load current. A power-aware software and hardware design approach for the dynamic voltage scaling (DVS) enabled system was presented according to the relationship between the changes in the battery capacity and DVS. The approach took the battery characteristics into account and parameterized the impacts of DVS on the battery capacity. Then the power-aware embedded system design model was established in theory. According to the model, there are two power-efficient embedded system design principles: the optimal speedup factor and the optimal work ratio. Experimental results show that the approach is more accurate to reflect the trade-off between battery life and performance, and the speed derived from the approach is optimal.