运动目标的传感器网络模糊可测性研究 .pdfVIP

学兔兔 第31卷 第9期 仪 器 仪 表 学 报 Vo1．31 No．9 2010年9月 Chinese Journal of Scientific Instrument Sep．2010 运动目标的传感器网络模糊可测性研究 曹文明 ，王 瑞 (1 深圳大学信息工程学院 深圳 518060；2 上海大学通信与信息1二程学院 卜海 200072) 摘 要：针对面向目标定位的不确定传感器网络，本文利用模糊n维几何方法对运动目标的传感器网络模糊可测性问题进行 深入分析和探讨，给出了仅含有角度信息的被动传感器网络目标定位的模糊解析偏差表示方法，详细分析了在R 空间模糊线 性观测轨迹情况下运动目标的模糊估计偏差和目标几何定位之间的关系，通过在固定时间间隔测量被动目标的模糊方位角、俯 仰角以实现R 空间中被动目标的模糊坐标和运动速度的四维定位。最后通过仿真实验验证了该方法的合理性和有效性。 关键词：传感器网络；模糊可测性；模糊n维几何；定位 中图分类号：TP393 文献标识码：A 国家标准学科分类代码：520．3050 Research on fuzzy measurability of moving target in sensor networks Cao Wenming ，Wang Rui (J School of Information Engineering，Shenzhen University，Shenzhen 518060，China； 2 School of Communication and Information Engineering，Shanghai University，Shanghai 200072，China) Abstract：Aiming at target—localization oriented uncertain sensor network，an approach of fuzzy n—dimensional geom— etry is introduced to investigate the fuzzy measurability of moving target in sensor networks．The fuzzy analytical bias expressions are derived for the bearing—only target localization in a passive sensor network．A detailed analysis of the interplay between target localization geometry and fuzzy estimation bias for the case of fuzzy linear observer trajeetory in R space is provided，which can realize four—dimensional localization，including the fuzzy estimate coordinate and speed of the target，through measuring fuzzy azimuth angle and fuzzy elevation angle at intervals of fixed time．Simu- lation results validate the rationality and effectiveness of the proposed method． Key words：sensor network；fuzzy measurability；fuzzy n—dimensional geometry；localization