基于提升小波的ECU仿真测试台信

Signal Detection for ECU Simulation Testing Platform based on Lifting Wavelet

电子控制单元(electronic control unit,ECU)仿真测试台用频率量来模拟汽车的转速,但是ECU有时不能有效识别工控机通过定时器8253发出的频率量。采用提升小波对该信号进行奇异性检测,并实现MATLAB仿真。同传统小波变换相比,提升小波变换计算速度更快,计算方法更简单,而快速计算在要求实时操作的场合中非常重要。在仿真实验中,信号分解的细节部分清晰地显示了间断点的准确位置,仿真结果证明了该方法的可行性和有效性,并为下一步提高ECU仿真测试台的性能奠定基础。

The rotating speed is simulated by the frequency of ECU simulation testing platform. However, ECU sometimes can＇t recognize the frequency emitted by industry-controlled computer through timer 8253. The signal singularity is detected with lifting wavelet and simulation is performed with MATLAB. Compared with traditional wavelet transform, lifting wavelet transform calculates fast and easily since fast calculation is very important especially when a real-time operation is needed. In the simulation experiment, the discontinuity is located accurately and clearly in the detailed part of the signal decomposition. The simulation result proves that the proposed method is feasible and valid, which provides support for next improving the performance of ECU.