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DA-LM算法在MEMS加速度传感器误差校正中的应用研究 被引量:6
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作者 乔美英 许城宽 +2 位作者 汤夏夏 高翼飞 史建柯 《传感技术学报》 CAS CSCD 北大核心 2021年第2期223-231,共9页
针对随钻测斜(Measurement-While-Drilling,MWD)技术中,微机电系统(Micro-Electro-Mechanical System,MEMS)三轴加速度计存在零点偏差、刻度因子误差、三轴非正交及与载体的未对准误差,造成姿态解算精度较低的问题,提出通过蜻蜓算法Drag... 针对随钻测斜(Measurement-While-Drilling,MWD)技术中,微机电系统(Micro-Electro-Mechanical System,MEMS)三轴加速度计存在零点偏差、刻度因子误差、三轴非正交及与载体的未对准误差,造成姿态解算精度较低的问题,提出通过蜻蜓算法Dragonfly Algorithm(DA)及Levenberg-Marquardt(LM)联合校正误差参数的DA-LM算法。基于加速度计误差来源,建立加速度传感器线性误差模型并转化为椭球方程;由DA优化椭球参数实现全局寻优;再经推导得到新的校正目标函数并通过LM算法估计误差参数;最后利用本文所提对准策略实现加速度计与载体的对准。依据仿真实验,DA-LM算法可以精确估计加速度误差参数。通过双轴转台实验获取实验数据,校正前横滚角与俯仰角最大绝对误差分别为:0.86°和4.87°,校正过后分别降低为0.26°及0.49°。结果表明本文提出算法能正确补偿加速度计误差参数,姿态解算精度明显提高。 展开更多
关键词 随钻测斜 联合校正 DA-LM算法 加速度计
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Adaptive virtual MIMO-based cross-layer design for wireless sensor networks via hybrid optimization model
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作者 Monali Prajapati Jay Joshi 《International Journal of Modeling, Simulation, and Scientific Computing》 EI 2021年第2期20-39,共20页
In recent times,many MAC protocols were implemented for boosting and improving energy efficiency(EE)in WSNs.Moreover,the cooperative MIMO method is found to be much capable of enhancing the EE of WSNs if configured pr... In recent times,many MAC protocols were implemented for boosting and improving energy efficiency(EE)in WSNs.Moreover,the cooperative MIMO method is found to be much capable of enhancing the EE of WSNs if configured properly.This paper intends to propose cross-layer design for multihop virtual MIMO system to enhance the end-to-end(ETE)reliability,EE,and QoS of the adopted WSN.The protocol is set here to focus on the energy utilization for transmission of data packets by optimal selection of transmission constraints for each node of the network.Moreover,the protocol’s ETE latency and throughput are also modeled as the dependent variables of BER performance of every link.To discover the improved BER criteria of each link that meets the ETE QoS requirement in reduced energy utilization,this paper employs a new hybrid optimization algorithm named Lion Mutated Dragonfly Algorithm(LM–DA)that is a hybrid variant of both Lion Algorithm(LA)and Dragonfly Algorithm(DA).Finally,the performance of the adopted scheme is validated over other state-of-the-art models.The results state that the energy consumed by the adopted LM–DA approach is about 2.65%,1.77%,and 1.77%reduced over LA,PSO,and DA schemes,respectively. 展开更多
关键词 MIMO QoS provisioning energy utilization LATENCY BIT-ERROR-RATE lm-da
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