In this paper, hysteretic behavior modeling, system identification and control of a mechanism that is actuated by shape memory alloy (SMA) wires are presented. The mechanism consists of two airfoil plates and the rotation angle between these plates can be changed by SMA wire actuators. This mechanism is used to identify the unknown parameters of a hysteresis model. Prandtl–Ishlinskii method is ...

Power system stabilizers (PSSs) must be capable of providing appropriate stabilization signals over abroad range of operating conditions and disturbances. The main idea of this paper is changing aclassic PSS (CPSS) to an adaptive PSS using genetic algorithm. This new genetic algorithm based onadaptive PSS (GAPSS) improves power system damping, considerably. The controller design issue isformula...

A major source of performance degradation in highperformance distributed applications has been attributed to poor end-to-end TCP performance. The root causes of poor TCP performance are difficult to isolate and diagnose, and the efficacy of tuning efforts are often difficult to gauge. This paper describes some sources of poor TCP performance, and describes a method to diagnose some of these pro...

Project Solutions. Increasing responsiveness is often dealt against decreasing another valuable resource. As responsiveness is a quality, the most significant resources in a software project to trade off are scope, cost, time, and other quality aspects. In a lot of systems, namely “embedded systems”, software is an integral part, but only one part of the system. Here trade-offs against hardware...

Recent research on managing complex computing systems has focused on the autonomic computing vision: Systems should manage themselves according to high level administrative goals [5]. As an example, system components should monitor the environment and self-tune to meet quality of service expectations, without requiring manual intervention in selecting concrete configuration options or in coordi...

The synchronous tuning of the self-oscillating wireless power transfer (WPT) in a close-coupling condition is studied in this paper. The Hamel locus is applied to predict the self-oscillating points in the WPT system. In order to make the system operate stably at the most efficient point, which is the middle resonant point when there are middle resonant and split frequency points caused by freq...

The performance optimization of scientific applications usually requires an in-depth knowledge of the hardware and software. A performance tuning mechanism is suggested to automatically tune OpenACC parameters to adapt to the execution environment on a given system. A historic learning based methodology is suggested to prune the parameter search space for a more efficient auto-tuning process. T...

<p>In this study, a control strategy based on the self-tuning method and synchronous reference frame (SRF) with PI regulator is proposed to achieve optimum quality of power in an autonomous micro grid (MG). The MGS multiple distributed generation (DG) connected 120 kV grid. system first simulated fixed gain values for controller which are not optimal sudden changes i.e. transition MG isla...