Fault analysis of wind turbine gearbox based on long term and short term memory network
As a new machine learning method, deep learning method has been widely used in image processing, speech recognition, brain computer […]
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Fault signal of planetary gear based on ELMD optimized by adaptive noise parameters
The time domain waveform of vibration data measured when the planetary gear is cracked is shown in Figure 1. It
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Study on Analytical Time-varying Meshing Stiffness of Gear
Chen et al. deduced and studied the influence of the meshing stiffness of the internal meshing gear pair and the
Scientific
Study on Time-varying Meshing Stiffness of Analytical Gear
The analytic method of potential energy is mainly based on the elastic mechanics theory and the elastic deformation energy under
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Research on residual life prediction of gear based on long term and short term memory network
In recent years, deep learning has been widely concerned. Deep learning constructs a neural network model with many hidden layers
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Optimization effect evaluation of multi gear rocker box in shearer cutting section
This part analyzes the influence of rocker box structure optimization on gear meshing state of internal transmission system. Stationary random
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Fault analysis of planetary gearbox based on elmd with adaptive noise parameter optimization
In order to verify the effectiveness of the proposed method in planetary gearbox fault diagnosis, a planetary gearbox fault simulation
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Meshing stiffness of variable hyperbolic arc gear based on finite element method
(1) Based on the finite element method, the meshing stiffness finite element calculation model and meshing stiffness calculation method of
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Dynamic model of planetary gear transmission system
According to Lagrange equation, the dynamic differential equation of planetary transmission system can be deduced as follows Among them, JS,
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Meshing stiffness analysis of variable hyperbolic arc gear based on finite element method
In the process of gear meshing, the periodic changes of the number of meshing teeth and meshing position lead to
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Time varying meshing stiffness of planetary gears
In order to ensure the continuous operation, the meshing process of gears is actually the alternating meshing of single pair
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China standard for gear transmission system
With the development of national industrial equipment and the urgent need for industrial products to be improved, the bearing capacity,
Scientific
Dynamics model of gear transmission system under fatigue pitting of tooth surface
Figure (b) and (c) the torsional vibration dynamic model of elastic support model (figure) (a) effect can reflect more parameters,
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Dynamic mathematical model of gear transmission system with different degrees of freedom and analysis objects
With three degrees of freedom type torsional vibration model (FIG. (a)) as the carrier for the influence parameters calculation and
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Study on Dynamics Model of Gear Transmission System
Based on the single degree of freedom torsion model, Zajkek et al. used parabolic functions to describe the engagement stiffness
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Explanation of gear transmission system characteristics
Gear system dynamics is a complex multi-coupling dynamics system, which strictly follows the system input-carrier analysis-response output dynamic control response
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Dynamic characteristics of gear transmission system under fatigue pitting of tooth surface
The five development concepts of innovation, coordination, green, open and sharing are put forward, green production and green transformation are
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Tractor gear transmission mechanism based on mathematical analysis
In the process of tractor gear transmission, the transmission load is large, the running speed is low, and the transmission
Scientific
Calculation of contact life of American Standard ANSI / AGMA 2001-d04 gears
American Standard ANSI / agma2001 is adopted to calculate the required contact strength, and the calculation formula is as follows:
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S-N curve of contact strength of ANSI / AGMA 2001-d04 standard gears
In the design of American standard gears, steel, Grade2, hrc58-64 (AGMA), case carbonized steel and case hardened gear materials similar
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Calculation of gear life in ISO / TS 6336-2 standard
1.Calculate the S-N curve of gear The required contact strength is calculated according to ISO / TS 6336-2. Since it
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Topology optimization model of multi gear rocker box in shearer cutting section
Structural optimization is the application of optimization algorithm in mechanical design. According to different optimization variables and levels, it can
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Nonlinear connection of multi stage gear transmission box coupling dynamic model
Bearing reaction force, meshing load of fixed shaft gear, driving torque of cutting motor and cutting roller load are considered
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Tractor heavy duty gear parameters and working conditions based on American Standard ANSI / AGMA 2001-d04 and international standard ISO / TS 6336-2
The bending fatigue life of tractor gear is closely related to the selection of gear modulus, which can be selected
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Constraint conditions of Tractor Gear Optimization Based on mathematical analysis
According to the characteristics of objective function and planetary gear design, constraints can be divided into flexible constraints and rigid
Scientific
Linear elastic connection of multi-stage gear transmission box coupling dynamic model
The motor rotor and the gear shaft 1, the gear shaft 8 and the sun gear of the first stage
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Gearbox fault diagnosis method based on multi-channel one-dimensional convolutional neural network feature learning
The input of multi-channel signal can collect fault feature information more comprehensively, and CNN has achieved great success in the
Scientific
Mathematical model of Tractor Gear Optimization Based on mathematical analysis
According to the large power of tractor transmission system, higher requirements are put forward for the strength and service life
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Example of data preprocessing method for fan condition monitoring based on physical structure of gearbox
Take the detection of high-speed shaft gear as an example. The sensor data of high-speed shaft bearing position is taken
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VMD comparison and verification of variable speed gearbox gear calculation
In order to further illustrate the superiority of this method, the order spectrum obtained by EMD and itd is compared
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Application example of fan condition monitoring based on physical structure of gearbox
It is tested and verified on a 1.5 MW wind turbine in a wind farm. The gearbox of the fan
Scientific
Rigid connection of multi-stage gear transmission box coupling dynamic model
When the gear and the shaft are connected by spline, or the analysis object is the gear shaft, it can
Scientific
Feature extraction of gear uniform wear fault
Through the method proposed in this paper, the feature extraction of gear uniform wear fault is carried out, and the
Scientific
Structural optimization design of multi gear rocker box in shearer cutting section
Topology optimization is a kind of conceptual design. The optimization results are shown in the figure, which can not be
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Data preprocessing algorithm based on gearbox configuration
For variable speed rotating machinery such as fan, in the process of operation, various signals reflecting its operation information are
Scientific
Feature extraction of gear broken fault
Firstly, the vibration signal is resampled in the angular domain, and the input shaft speed curve (as shown in Figure
Scientific
Non Hertz contact model of multi-stage gear with three-dimensional topological modification considering box deformation
Three dimensional topological modification is an effective means to improve the transmission quality of gear system, which includes two directions
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Dynamic performance optimization of multistage gears in shearer cutting section
The ultimate goal of dynamic analysis is to design object products with high dynamic performance. The coupling dynamic model of
Scientific
Numbering method of degrees of freedom for multi-stage gear transmission box coupling dynamic model
The generalized displacements of substructure dynamic equations are numbered in local coordinates, and the generalized displacements of each substructure will
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Data compression algorithm based on gearbox configuration
The data compression algorithm based on the gearbox configuration is based on the physical structure of the gearbox and the
Scientific
VMD for solving variational problems in gear calculation of variable speed gearbox
By introducing the quadratic penalty factor α and Lagrange operator λ (T), the constrained variational problem is transformed into the
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Improved data preprocessing process of fan condition monitoring based on physical structure of gearbox
The improved data preprocessing process is a method to extract effective data by combining gearbox configuration with real-time data acquisition
Scientific
Variational modal decomposition of Gearbox Based on VMD-FastICA
VMD is an adaptive signal analysis method, which can find the optimal solution of the variational model through multiple iterations,
Scientific
Tooth direction error of multi-stage gear meshing in shearer cutting part
Under the influence of the elastic deformation of the supporting system, the axes of the parallel gears are skewed in
Scientific
Substructure set of multi stage gear box coupling dynamic model
According to the different coordination relationship of the interface of each substructure, the connection types between the corresponding nodes can
Scientific
Minimum entropy deconvolution of gearbox
Med is to eliminate the influence of transmission path by optimizing the filter. xn(n = 1，2，… , n) is the
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Fan condition monitoring system based on physical structure of gearbox
A centralized and unified monitoring center is proposed to complete the functions of real-time data acquisition and remote centralized control.
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Example and mathematical model of optimum design for minimum center distance of two stage spur gear
As shown in the figure, it is known that the input power P1 of the high-speed stage of the two-stage
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Data preprocessing of fan condition monitoring based on physical structure of gearbox
Condition monitoring of wind turbine can understand the health status of wind turbine in real time and reduce the maintenance
Scientific
Substructure decomposition of multi stage gear box coupling dynamic model
The cutting part is divided into rocker box, fixed shaft gear, gear shaft, cutting drum, planetary gear train and cutting
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Gear fault diagnosis of variable speed gearbox based on VMD order tracking
The hardware order tracking needs professional Keyphasor device, which has high cost, complex installation and large application scope; the order
Scientific
Example and mathematical model of optimum design for minimum center distance of two stage spur gear
As shown in the figure, it is known that the input power P1 of the high-speed stage of the two-stage
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Main parameters of multi-stage gear transmission box coupling dynamic model
The dynamic modeling method of multi-stage gear system under the condition of large deformation is studied. Taking the cutting part
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Constraint conditions of minimum center distance for two stage spur gears
① According to the contact fatigue strength formula of tooth surface, the The constraint conditions of tooth surface are obtained
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Research on vmd-fastica in gearbox fault diagnosis
In order to make up for the disadvantage that ICA can only be applied to the blind source separation problem
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Dynamic model of multistage gear transmission coupled with box
Dynamic substructure method is an effective method to analyze complex mechanical systems and structural systems. Although some scholars have used
Scientific
Mathematical model of minimum center distance of two stage spur gear
The transmission diagram of the reducer is shown in the figure, and the optimization design is carried out according to
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Gearbox fault diagnosis based on VMD-FastICA
In mechanical transmission equipment, gearbox plays an extremely important role, it is widely used in all walks of life. It
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Brief introduction of fimicon function of minimum center distance of two stage spur gear
Given the transmission power P, transmission ratio I and output speed n of the reducer, a set of technical parameters
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Analysis of load stroke curve in precision forming process of spur gear
The load stroke curves of the two processes are shown in the figure. It can be seen from the figure