Nowadays, GPS （global positioning system） receivers are aided by INS （inertial navigation systems） to achieve more precision and stability in land-vehicular navigation. KF （Kalman filter） is a conventional metho...Nowadays, GPS （global positioning system） receivers are aided by INS （inertial navigation systems） to achieve more precision and stability in land-vehicular navigation. KF （Kalman filter） is a conventional method which is used for the navigation system to estimate the navigational parameters, when INS measurements are fused with GPS data. However, new generation of INS, which relies on MEMS （micro-electro-mechanical systems） based low-cost IMUs （inertial measurement units） for the land navigation systems, decreases the accuracy and the robustness of navigation system due to their inherent errors. This paper provides a new method for fusing the low-cost IMU and GPS measurements. The proposed method is based on KF aided by AF1S （adaptive fuzzy inference systems） as a promising solution to overcome the mentioned problems. The results of this study show the efficiency of the proposed method to reduce the navigation system errors in comparison with KF alone.展开更多
为更全面了解机采棉和手采棉纤维品质差异,简单介绍了Advance fiber information system(以下简称AFIS)的测试原理以及测试指标,并利用AFIS PRO2单纤维测试仪对机采棉和手采棉进行测试,详细分析了机采棉和手采棉在棉结、适纺纱线支数及...为更全面了解机采棉和手采棉纤维品质差异,简单介绍了Advance fiber information system(以下简称AFIS)的测试原理以及测试指标,并利用AFIS PRO2单纤维测试仪对机采棉和手采棉进行测试,详细分析了机采棉和手采棉在棉结、适纺纱线支数及纤维长度方面的差异。结果表明:机采棉棉结性能跟手采棉相似,长度略短于手采棉,总体上机采棉的纤维品质略差于手采棉,但差别不显著,为机采棉的推广提供依据,同时为纺织企业配棉、用棉提供参考。展开更多
文摘Nowadays, GPS （global positioning system） receivers are aided by INS （inertial navigation systems） to achieve more precision and stability in land-vehicular navigation. KF （Kalman filter） is a conventional method which is used for the navigation system to estimate the navigational parameters, when INS measurements are fused with GPS data. However, new generation of INS, which relies on MEMS （micro-electro-mechanical systems） based low-cost IMUs （inertial measurement units） for the land navigation systems, decreases the accuracy and the robustness of navigation system due to their inherent errors. This paper provides a new method for fusing the low-cost IMU and GPS measurements. The proposed method is based on KF aided by AF1S （adaptive fuzzy inference systems） as a promising solution to overcome the mentioned problems. The results of this study show the efficiency of the proposed method to reduce the navigation system errors in comparison with KF alone.
文摘为更全面了解机采棉和手采棉纤维品质差异,简单介绍了Advance fiber information system(以下简称AFIS)的测试原理以及测试指标,并利用AFIS PRO2单纤维测试仪对机采棉和手采棉进行测试,详细分析了机采棉和手采棉在棉结、适纺纱线支数及纤维长度方面的差异。结果表明:机采棉棉结性能跟手采棉相似,长度略短于手采棉,总体上机采棉的纤维品质略差于手采棉,但差别不显著,为机采棉的推广提供依据,同时为纺织企业配棉、用棉提供参考。
