针对智能手机测步问题,提出基于行人航位推测技术的测步(Pedestrian Dead Reckoning-based Step Detection,PDR-SD)算法。PDR-SD算法依据从智能手机获取加速的数据,实现测步。PDR-SD算法引用低复杂信号处理技术滤除噪声,再估计峰值和谷...针对智能手机测步问题,提出基于行人航位推测技术的测步(Pedestrian Dead Reckoning-based Step Detection,PDR-SD)算法。PDR-SD算法依据从智能手机获取加速的数据,实现测步。PDR-SD算法引用低复杂信号处理技术滤除噪声,再估计峰值和谷值,同时避免因无意手机移动而产生虚步,从而实现准确地测步。为了分析PDR-SD性能,依据Android平台建立实验。实验数据表明,提出的PDR-SD算法能够实时地检测步伐,并且检测率保持99%以上。展开更多
To improve underwater vehicle dead reckoning, a developed strong tracking adaptive kalman filter is proposed. The filter is improved with an additional adaptive factor and an estimator of measurement noise covariance....To improve underwater vehicle dead reckoning, a developed strong tracking adaptive kalman filter is proposed. The filter is improved with an additional adaptive factor and an estimator of measurement noise covariance. Since the magnitude of fading factor is changed adaptively, the tracking ability of the filter is still enhanced in low velocity condition of underwater vehicles. The results of simulation tests prove the presented filter effective.展开更多
首先介绍了活动范围受限人员监管系统的需求和研究意义,之后给出了系统的总体架构.在此基础上,着重介绍了基于RSSI(Received Signal Strength Indication)的测距原理和高斯模型校验方法,以及利用陀螺仪传感器通过航位推测算法进行方位...首先介绍了活动范围受限人员监管系统的需求和研究意义,之后给出了系统的总体架构.在此基础上,着重介绍了基于RSSI(Received Signal Strength Indication)的测距原理和高斯模型校验方法,以及利用陀螺仪传感器通过航位推测算法进行方位计算的思想与方法.系列测试和实验结果表明,采用的RSSI测距方法和航位推算方法设计的系统可以有效的应用于活动范围受限人员的监管.展开更多
文摘针对智能手机测步问题,提出基于行人航位推测技术的测步(Pedestrian Dead Reckoning-based Step Detection,PDR-SD)算法。PDR-SD算法依据从智能手机获取加速的数据,实现测步。PDR-SD算法引用低复杂信号处理技术滤除噪声,再估计峰值和谷值,同时避免因无意手机移动而产生虚步,从而实现准确地测步。为了分析PDR-SD性能,依据Android平台建立实验。实验数据表明,提出的PDR-SD算法能够实时地检测步伐,并且检测率保持99%以上。
文摘To improve underwater vehicle dead reckoning, a developed strong tracking adaptive kalman filter is proposed. The filter is improved with an additional adaptive factor and an estimator of measurement noise covariance. Since the magnitude of fading factor is changed adaptively, the tracking ability of the filter is still enhanced in low velocity condition of underwater vehicles. The results of simulation tests prove the presented filter effective.
文摘首先介绍了活动范围受限人员监管系统的需求和研究意义,之后给出了系统的总体架构.在此基础上,着重介绍了基于RSSI(Received Signal Strength Indication)的测距原理和高斯模型校验方法,以及利用陀螺仪传感器通过航位推测算法进行方位计算的思想与方法.系列测试和实验结果表明,采用的RSSI测距方法和航位推算方法设计的系统可以有效的应用于活动范围受限人员的监管.