Liang Yanbin, Wu Kaiwei, Yang Bing, Hao Shijun, Huang Zhonghua
School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China.
Sensors (Basel). 2025 Aug 14;25(16):5065. doi: 10.3390/s25165065.
In ultra-wideband (UWB) radio fuze architectures, the receiver serves as the core component for receiving target-reflected signals, with its performance directly determining system detection accuracy. Manufacturing tolerances and operational environments induce inherent stochastic perturbations in circuit components, causing deviations of actual parameters from nominal values. This consequently degrades the signal-to-noise ratio (SNR) of receiver outputs and compromises ranging precision. To overcome these limitations and identify critical sensitive components in the receiver, this study proposes the following: (1) A dual-channel time-domain correlated UWB fuze detection model; and (2) the integration of an asymmetric tolerance mathematical model for dual-channel correlated receivers with a Morris-LHS-Sobol collaborative strategy to quantify independent effects and coupling interactions across multidimensional parameter spaces. Simulation results demonstrate that integrating capacitors and resistors constitute the dominant sensitivity sources, exhibiting significantly positive synergistic effects. Physical simulation correlation and hardware circuit verification confirms that the proposed model and sensitivity analysis method outperform conventional approaches in tolerance resolution and allocation optimization, thereby advancing the theoretical characterization of nonlinear coupling effects between parameters.
在超宽带（UWB）无线电引信架构中，接收器是接收目标反射信号的核心组件，其性能直接决定系统检测精度。制造公差和运行环境会在电路元件中引发固有的随机扰动，导致实际参数偏离标称值。这进而会降低接收器输出的信噪比（SNR）并影响测距精度。为克服这些限制并识别接收器中的关键敏感组件，本研究提出以下内容：（1）一种双通道时域相关UWB引信检测模型；（2）将双通道相关接收器的非对称公差数学模型与Morris-LHS-Sobol协作策略相结合，以量化多维参数空间中的独立效应和耦合相互作用。仿真结果表明，集成电容和电阻构成主要的敏感源，呈现出显著的正协同效应。物理仿真相关性和硬件电路验证证实，所提出的模型和灵敏度分析方法在公差分辨率和分配优化方面优于传统方法，从而推进了参数间非线性耦合效应的理论表征。
