Global Positioning Systems (GPS) refers to satellite-based radio-positioning systems and time-transfer systems that provide three-dimensional course, position, and time information to suitably equipped users. At prese...
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ISBN:
(纸本)9783319014654
Global Positioning Systems (GPS) refers to satellite-based radio-positioning systems and time-transfer systems that provide three-dimensional course, position, and time information to suitably equipped users. At present, GPS system is world-wide used for positioning and navigation, attracting great attention from the scientific, professional and social *** satellites are orbiting Earth at altitudes of 20.200 km and the GPS signal is mostly affected by the atmospheric effects. The scope of this paper is to investigate the performance impact of the atmospheric correction models in the overall positioning accuracy. Real GPS measurements were gathered using a single frequency receiver and post-processed by our proposed innovative adaptive LMS algorithm. We integrated Klobuchar and Hopfield correction models enabling a considerable reduction of the vertical error.
Having studied the synchronized multi-axis control servo system, some type automatic wire striping and terminal crimping system is developed in the paper. In order to realize the precise and efficient synchronized mul...
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ISBN:
(纸本)9780878492800
Having studied the synchronized multi-axis control servo system, some type automatic wire striping and terminal crimping system is developed in the paper. In order to realize the precise and efficient synchronized multi-axis control, the pvt (Position-Velocity-Time) algorithm is adopted. This algorithm allows user to specify the time interval of each axis' motion segment, so the multi-axis working sequence can be easily established in a tight way which augments the system processing speed and guarantees the system stability. Besides, by specifying the position and speed value at the processing point, the positioning accuracy and speed requirement at the processing point can be reached. In the design of the system control software, the modularization design is employed. This modularization idea simplifies the complex software design and allows people use the software more easily. Finally, the experimental result shows the system has a good synchronization performance, and meets the requirements of high efficiency, stability and positioning accuracy in practical production.
In this paper, it focuses on the pvt decoding process of COMPASS satellite navigation system against the operator background of COMPASS satellite navigation system. On the basis of conventional solver methods, Kalman ...
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ISBN:
(纸本)9781479970056
In this paper, it focuses on the pvt decoding process of COMPASS satellite navigation system against the operator background of COMPASS satellite navigation system. On the basis of conventional solver methods, Kalman fitering is proposed and analyzed in the solver application of the COMPASS satellite navigation to improve positioning accuracy.
To improve Parallel Variable Transformation method (pvt) for unconstrained optimization problem, different research direction is constructed in every processor. The every research direction is proved to a descent dire...
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ISBN:
(纸本)9781424465828
To improve Parallel Variable Transformation method (pvt) for unconstrained optimization problem, different research direction is constructed in every processor. The every research direction is proved to a descent direction. Every minimizer is researched along every descent direction in every processor. A starting vector is updated by selecting the minimizer in every processor in next iteration. In theory, Convergence and rates of convergence of the method is proved. Some numerical results on HP rx 2600 cluster show that experimental results are consistent with the theory, and the efficiency of the algorithm is very high.
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