3results about How to "Improve filtering ability" patented technology

The invention discloses a rolling bearing fault signal processing method based on GWO parameter searching optimization VMD, and the method comprises the following steps: 1, employing a GWO-VMD combined wavelet threshold function de-noising method, carrying out the reconstruction of a useful noise component and a de-noising component, and obtaining a de-noised signal; 2, in each iteration process, the multi-scale permutation entropy is used as a fitness function, a GWO algorithm is used for automatic optimization to obtain parameters alpha and k, the accuracy of poor parameters caused by artificial experience is effectively improved, an optimal parameter combination is found, and signals are decomposed more accurately; and step 3, setting the re-constrained VMD according to the results of the parameters alpha and k obtained in the above step to obtain each IMF component, calculating the envelope spectrum of each component, and performing envelope analysis on the envelope spectrum to find the fault frequency.

The invention provides a method and a system for adjusting carrier frequency points, carrier bandwidth and the like. Performing multi-stage compression optimization on the original model through deep learning pruning or knowledge distillation to obtain a model after multi-stage compression optimization; and the like. The sensor calibration method and system have the capability of being deployed in the sensor terminal device, the base station and the cloud server respectively, application in multiple types of sensor devices and multiple scenes of the sensor devices is achieved, and simple and efficient inspection of calibration results is achieved through multi-stage cooperative calibration.

The embodiment of the present application provides a filtering assembly, a motor controller and a vehicle, the filtering assembly comprising: a magnetic ring, a filtering circuit board and two conductive parts; at least part of the filtering circuit board extends to between the two conductive parts to insulate the two conductive parts; and the magnetic ring is sleeved on the two conductive parts. The filtering assembly of the present application adopts the form of combination of magnetic ring filtering and active filtering, and has stronger filtering capacity. Under the same filtering requirement, the volume of the magnetic ring can be appropriately reduced. In addition, the filtering circuit board can be reused as an insulation structure between the two conductive parts, so that the spacing of the two conductive parts can be reduced, thereby the volume of the magnetic ring can be further reduced, and the miniaturization design of the filtering assembly is facilitated.