汽车组合仪表有意电磁干扰空时域联合分离系统设计

Design of air-time-domain joint separation system for automobile combined instrument with intentional electromagnetic interference

摘要:

有意电磁波与汽车仪器电磁传输波产生的混合干扰,降低了汽车组合仪表的稳定运行能力,造成仪表设备失灵。为避免上述情况的发生,设计汽车组合仪表有意电磁干扰空时域联合分离系统。在步进电机驱动电路中,设置汽车组合仪表控制器、分离电源与 PCB 电路板、有意电磁干扰数字传感器。分配有意电磁波空时域源地址,通过计算干扰信号平坦度的方式,确定脉冲参数的取值范围,实现汽车组合仪表有意电磁的空时域干扰效应分析。估算有意电磁波干扰信号的数目,按照信号分解的处理原则,求解联合分离修正函数,实现电磁干扰的联合分离。实验结果表明,设计系统应用后可以在混合信号中,按照空域、时域标准的不同分离有意电磁波,不会因混合干扰降低汽车组合仪表的稳定运行能力。

Abstract:

The mixed interference generated by intentional electromagnetic waves and electromagnetic transmission waves of automotive instruments reduces the stable operation ability of the automotive instrument cluster, causing instrument equipment failure. To avoid the occurrence of the above situation, design an intentional electromagnetic interference time-space joint separation system for the automotive combination instrument. In the stepper motor drive circuit, set up a car combination instrument controller, separate the power supply from the PCB circuit board, and intentionally electromagnetic interference digital sensors. Assign the spatial and temporal source addresses of intentional electromagnetic waves, determine the range of pulse parameters by calculating the flatness of interference signals, and achieve the analysis of spatial and temporal interference effects of intentional electromagnetic waves in automotive combination instruments. Estimate the number of intentional electromagnetic interference signals, follow the processing principles of signal decomposition, solve the joint separation correction function, and achieve joint separation of electromagnetic interference. The experimental results show that the designed system can separate intentional electromagnetic waves in mixed signals according to different spatial and temporal standards, without reducing the stable operation ability of the vehicle combination instrument due to mixed interference.