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A rate-dependent modeling method and a real-time tracking control scheme are designed to eliminate the hysteresis nonlinearity of the piezoelectric micro positioning (PMP) platform. First, we use Duhem model cascaded a transfer function to structure the rate-dependent hysteresis nonlinearity of the PMP platform. Then, based on the established Duhem inverse model and phase compensation for transfer...
In order to describe the inherent hysteresis nonlinearity of the piezo-actuated stages, a Krasnosel'skii-Pokrovskii (KP) model is presented in the paper. The parameters of the KP model are identified by a modified bat optimization algorithm based on Levy fights trajectory. The modified bat optimization algorithm uses the Levy fights trajectory to improve the global searching ability and break away...
The security problems of the tactical mobile ad hoc networks have become a research hotspot in recent years. For its characteristics of multi-hop, energy limited, strong self-organization, high mobility and so on, a cluster mobility model meeting the battlefield practical application is proposed. In this model, the DDoS attacks are introduced to the tactical mobile ad hoc networks in both standby...
Based on both construction methods of the epidemic models and mechanism of the worm propagation, a new SIRS model for virus propagation is derived. By using the theory of differential equations, the propagation regularity of worm virus is discussed and the threshold of removing virus is gained. The analysis techniques of the mathematical model provide theoretical foundation of control and forecast...
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