With three degrees of freedom type torsional vibration model (FIG. (a)) as the carrier for the influence parameters calculation and […]
American Standard ANSI / agma2001 is adopted to calculate the required contact strength, and the calculation formula is as follows: […]
1.Calculate the S-N curve of gear The required contact strength is calculated according to ISO / TS 6336-2. Since it […]
Structural optimization is the application of optimization algorithm in mechanical design. According to different optimization variables and levels, it can […]
Bearing reaction force, meshing load of fixed shaft gear, driving torque of cutting motor and cutting roller load are considered […]
According to the characteristics of objective function and planetary gear design, constraints can be divided into flexible constraints and rigid […]
The motor rotor and the gear shaft 1, the gear shaft 8 and the sun gear of the first stage […]
According to the large power of tractor transmission system, higher requirements are put forward for the strength and service life […]
In order to further illustrate the superiority of this method, the order spectrum obtained by EMD and itd is compared […]
When the gear and the shaft are connected by spline, or the analysis object is the gear shaft, it can […]
Through the method proposed in this paper, the feature extraction of gear uniform wear fault is carried out, and the […]
Topology optimization is a kind of conceptual design. The optimization results are shown in the figure, which can not be […]
Firstly, the vibration signal is resampled in the angular domain, and the input shaft speed curve (as shown in Figure […]
Three dimensional topological modification is an effective means to improve the transmission quality of gear system, which includes two directions […]
The generalized displacements of substructure dynamic equations are numbered in local coordinates, and the generalized displacements of each substructure will […]
By introducing the quadratic penalty factor α and Lagrange operator λ (T), the constrained variational problem is transformed into the […]
VMD is an adaptive signal analysis method, which can find the optimal solution of the variational model through multiple iterations, […]
Under the influence of the elastic deformation of the supporting system, the axes of the parallel gears are skewed in […]
According to the different coordination relationship of the interface of each substructure, the connection types between the corresponding nodes can […]
Med is to eliminate the influence of transmission path by optimizing the filter. xn(n = 1，2，… , n) is the […]
As shown in the figure, it is known that the input power P1 of the high-speed stage of the two-stage […]
The cutting part is divided into rocker box, fixed shaft gear, gear shaft, cutting drum, planetary gear train and cutting […]
As shown in the figure, it is known that the input power P1 of the high-speed stage of the two-stage […]
① According to the contact fatigue strength formula of tooth surface, the The constraint conditions of tooth surface are obtained […]
The transmission diagram of the reducer is shown in the figure, and the optimization design is carried out according to […]
Given the transmission power P, transmission ratio I and output speed n of the reducer, a set of technical parameters […]
The test set data is input into LSTM model to verify the effectiveness of model early warning. The prediction results […]
Randomly select 25% of the training set data as the verification set, set the model loss value as Mae, and […]
The LSTM model is trained by selecting the normal operation data of the unit. When the gearbox bearing is in […]
A new kurtosis spectral entropy index is proposed, which consists of kurtosis value and envelope spectral entropy. When there are […]
Particle swarm optimization algorithm has good global optimization ability. Suppose there are m particles in the d-dimensional space, which form […]
Under the elastic-plastic condition, the J-integral of helical gear crack describes the stress and stress field at the crack front […]
According to the working principle of Sanc, the separation effect of adaptive filter mainly depends on the selection of delay […]
After the candidate region is generated, the ROI pooling layer is used to further extract the features of the candidate […]
In order to generate accurate candidate regions, 512 feature maps are used as input of RPN (region proposal networks) and […]
The deep learning algorithm is introduced into the field of Ferrography Image recognition. The wear status of gearbox is evaluated […]
During the operation of the equipment, when abnormal friction occurs on the relative moving metal surface, wear particles will be […]
According to the normal state and the fault state, the corresponding two groups of data in the experiment are taken […]
Symmetrical differential energy operator demodulation and energy operator demodulation are only applicable to single component AM / FM signals, while […]
In this paper, the vibration data of the whole life cycle of the wear fault are obtained by testing the […]
In order to further verify the correctness of the analysis on the influence of grinding wheel position deviation on the […]
ZHY Gear adds three sinusoidal signals with different frequencies, and adds random signals for simulation analysis. The EMD method combined […]
The input torque tin = 1 000 n · m, the output torque tout = – 100 N · M. […]
1.EEMD principle In order to solve the mode aliasing phenomenon of IMF in the process of empirical mode decomposition (EMD), […]
In the study of multi degree of freedom system, the influence of viscous damping should be considered. The differential equation […]
Analysis of upsetting forming of mechanical gear The equivalent stress of initial cylindrical blank upsetting forming of mechanical gear is […]
The coupling of mild wear fault data produces a 1.5-dimensional envelope spectrum, as shown in Figure 1. It can be […]
In the whole life cycle experiment of planetary gear box, ZHY gear selects three groups of data of different time […]
The experimental system consists of three-stage planetary gearbox, motor, brake and its switch, sensors (acceleration sensor, eddy current sensor, etc.) […]
In the previous literature, 1.5-dimensional spectrum can be used to detect the secondary phase coupling, that is to say, frequency […]
According to the different definitions, the 1.5-dimensional spectrum of the complex harmonic signal can detect the components involved in coupling […]
Because the Gaussian process of the third-order cumulant spectrum is zero, it is often used to analyze the non Gaussian […]
In order to reduce the vibration and noise of gear in the process of power transmission and reduce the impact […]
The basic ideas of finite element analysis are summarized as follows 1) The continuous structure is discretized into a calculation […]
Five models are used to test the model fault on the validation data set. The validation data set has 5000 […]
In the process of planetary carrier transmission, the axis of planetary gear will be offset, and the load distribution in […]
The contact analysis of meshing gears of planetary gear train is carried out by using transient dynamic model. To simplify […]
The main failure modes of gear transmission are tooth surface pitting and tooth fracture. The working time of the reducer […]
Using the above method to calculate the NC machining coordinate of spiral tooth non bevel gear, the gear pitch curve […]
For the non-circular gear, assuming that the radius of the imaginary flat top gear is equal to the spherical radius […]
