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This paper proposes a method based on the quadratic programming (QP) sequence for solving loss-minimizing current, which yields minimum loss of motor, of control system for interior permanent magnet synchronous motor (IPMSM) of electric vehicle. First, the efficiency optimization of IPMSM is modeled as a constrained programming problem, and then transformed it into linear constraint QP sequence. The...
As the core control unit of ABS system, ECU plays an important role in evaluating the safety standards of the ABS system, it can be used to control the executive unit according to the state parameters of vehicle. Aimed at the high-cost, complex and long in the road test, an improved ABS ECU test system for the pneumatic ABS is proposed in this paper. Composed of finished ECU, data acquisition card,...
In recent years, with the progress and development of human society, the needs of extraterrestrial energy exploration and solar living space development has become more and more urgent. Deep Space Sensor Network has a unique conditions and technical advantages in deep space exploration due to its characteristics of low power, low cost, distribution and self-organization. Multicast routing protocol...
With Received Signal Strength (RSS) based indoor localization gaining popularity, recent research work has explored many different aspects of such localization systems, for instance, accuracy and deployment cost. In this paper, we study the computational cost of a ratio-based localization algorithm. Specifically, we use the algorithm's inherent distance ratio relationship to refine the physical region...
The settlement behavior of pile foundation is an important index for construction and design especially for bridges built on poor hydrologic and geologic conditions. Because the main of Sutong Bridge is situated in the tideway of Yangtze River, the maximum variable load caused by tidal range is about 224MN. It acts on pile foundation circularly, and affects the settlement of the pile group foundation...
Accurate presentation of high resolution images on wide varieties of multimedia devices, especially on pervasive mobile multimedia devices, faces great challenge. In this paper, we present an angle preserved warping method for image retargeting which allows resizing images to arbitrary aspect ratios while minimizing the loss of important information. To accomplish this, we first cover the original...
The impacts of the simulated domain range, mesh density, turbulence models, and discretization scheme on the accuracy of the computational results for characteristics of pumped storage intakes have been investigated separately. It is shown that, all of these factors have effect on the simulation accuracy. Insufficient domain range of the forebay would results in totally wrong conclusion. The results...
It is well known, reliability and workability are the more important issues in the field of chip size package (CSP). Creep and fatigue behaviors are the main loads of the solder joints, the reliability of which should take account of those two main loads. Based on the theory of continuum damage mechanics (CDM), this paper focuses on damage evolution of interaction between the fatigue and creep. A...
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