Jiangning Xu

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The paper describes a parallel genetic algorithm for the VLSI implementation of real-time GPS attitude determination systems. The genetic algorithm is based on a fine-grained model and utilises AFM (Ambiguity Function Method) for GPS attitude determination. The paper describes various implementation choices with for the genetic algorithm in order to achieve(More)
The error divergence of the strapdown inertial navigation system (INS) could be restrained through systemic rotation autocompensation technique. This technique could effectively bring system better precision performance without using higher precision gyros and accelerometers. An eight-position dual-axis rotation-dwell scheme is introduced, and system error(More)
In order to improve the convenience of installation and calibration of accelerometers, and to avoid the limitation of angular rate calculation in Gyroscope Free Strapdown Inertial Navigation System(GFINS),a new scheme of Gyroscope Free Inertial Navigation System using 9 accelerometers is proposed. All 9 accelerometers are installed on three orthogonal axes,(More)
Compared with platform inertial navigation system, strap-down inertial navigation system has advantages of small volume, low cost and large algorithm flexibility. But, its performance will be influenced by angular motion of the vehicle. Combined with the advantages of strap-down inertial navigation system and platform inertial navigation system, a platform(More)
-Accelerometer is one of the most important units in inertial navigation system. Its mathematical model is established, and its output equation is derived. Reconstructing acceleration signal in frequency-domain is adopted in order to reduce the integration error in inertial navigation position calculation. To restrain the Gibbs Phenomenon in the(More)
In order to improve precision of Gyroscope FreeStrapdown Inertial Navigation System (GFINS), the idea of rotation modulation is adopted. And a new scheme of GFINS using 10 accelerometers is proposed, which is convenient for modulation all of the accelerometers. Through rotating around three orthogonal axes respectively, biases of all 10 accelerometers in(More)
pH-zone-refining counter-current chromatography technique for the separation of natural and synthetic mixtures has been widely used, especially for organic acids and alkaloids. Phenolic acids are very important compounds due to the potential treatment for a wide variety of diseases. However, there is not a general method for their separation. In this work,(More)
It's a realistic difficult problem about how to improve the positioning accuracy and the reliability of RAIM algorithms, on the situation that there are not enough available satellites. This dissertation puts forward RAIM algorithms with the elevation information in the areas as marine navigation. Through this method, the information redundancy can be(More)
In order to shorten the alignment time and eliminate the small initial misalignment limit for compass alignment of strap-down inertial navigation system (SINS), which is sometimes not easy to satisfy when the ship is moored or anchored, an optimal model based time-varying parameter compass alignment algorithm is proposed in this paper. The contributions of(More)
Accurate data acquisition and processing is important to analyze the experimental results and research the theories of grain drying. Experiments of grain drying in a deep fixed-bed usually have characteristics of long period, difficult dynamic signal acquisition, large amount of experimental data and cockamamie data processing, etc. Aiming at the(More)