Feedback fuzzy-DVS scheduling of control tasks
The Journal of Supercomputing
Coscheduling of processor voltage and control task period for energy-efficient control systems
ACM Transactions on Embedded Computing Systems (TECS)
Feedback fuzzy-PI control dynamic voltage scaling for real-time control tasks
ROBIO'09 Proceedings of the 2009 international conference on Robotics and biomimetics
Optimization design of controller periods using evolution strategy
CIS'05 Proceedings of the 2005 international conference on Computational Intelligence and Security - Volume Part I
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For real-time computer-controlled systems, controlperformances of tasks as well as energy consumption ofoverall system must be optimized. A control task does nothave a fixed period but a range of periods in whichcontrol performance varies. Hence when more than onecontrol tasks are scheduled on a single processor, anoptimization problem appears. Furthermore, when anenergy saving technique such as dynamic voltage scalingis used, its properties affect the control performance.Using a performance index that involves controlperformance and energy consumption, a static solution isproposed to obtain optimal processor speed and a set ofperiods for given control tasks in O(k). Also, a dynamicsolution is proposed to utilize system services of real-timeoperating systems to overcome unavoidable deficienciesof the static solution and to further reduce the energyconsumption of the overall system. The performances ofproposed solutions are revealed via simulation studies.