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In wireless sensor networks, the energy of nodes is limited. so designing efficient routing for reducing energy consumption is important. In this paper we proposed A Low Power Grid-based Cluster Routing Algorithm of Wireless Sensor Networks (LPGCRA). The characteristic of this algorithm is that the WSN is divided into different grids according to information of the node location, and then the nodes...
Based on analysis of off-grid wind power system characteristics, a maximum power point tracking (MPPT) control strategy is investigated. The new control strategy employs double grey relation analysis (GRA) for maximum power extraction. The first GRA is used the generator output voltage to estimate the maximum power under various wind speed. Then the second GRA is used to estimate the convert duty...
The precision of the voltage phase angle measured by the PMU (Phasor Measurement Unit) can well meet the need of power system analysis and control. A new controller is proposed for power system stability, which can linearize its nonlinear state equations by online tracking of the state variable with the help of PMU, and complete an objective control strategy that forces the system state into a desired...
In this paper, the method of adaptive control with fractional order reference model was proposed. By introducing the fractional order calculus theory into control fields, it became much easier to promote the performance than integer order control system. Combining fractional order control theory and the traditional model reference adaptive theory, a new controller design was provided which added a...
Slide level is one of the most important indexes of CNC machine tool performance. A novel kind of sensorless rapid on-line evaluation technology for machine tool slide level based on linear or rotary scale, motor encoder and AC servo motor current/output torque is proposed. To acquire the level information, the sensorless test principle is profoundly investigated, and the relationship mathematical...
In terms of the space transformation theory, a new approach of generalized chaos synchronization is developed in the paper. It realizes generalized chaos synchronization by introducing space transformation into GS, in which the new approach takes use of filtering transformation to construct two isomorphic systems to actualize generalized synchronization. Furthermore, the new approach breaks the normal...
The paper presents a Bayesian networks (BN) based method to analyze the reliability of phased-mission systems (PMS). The method includes three steps. Firstly, each phase of PMS is represented by a BN framework, named phase-BN. Then, in order to express the dependences across phases, all the phase-BN are combined by (1) connecting the root nodes that represent the same component but belong to different...
Compared with their three-phase counterparts, multiphase machines with phase number n ges 5 have many advantages like lower torque pulsation, higher power density, better fault tolerance, etc. Due to these advantages and the increasing demands on high performance and high power adjustable speed drives, the research on multiphase drives has experienced a significant growth since the end of last century...
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