planetary gear

At present, the dynamic excitation of gear transmission system is divided into external and internal excitation. Among them, the external

(1) Transmission error Transmission error refers to the difference between the actual occupied position and the ideal position of the

The number of teeth of planetary transmission cannot be selected at will. Normal transmission can be carried out only when

According to the relevant models and parameters of the involute planetary gear reducer, as shown in Table 1. An accurate

1. Training data validation The 90 groups of trained samples are predicted by the RBF neural network established. Fig. 1

The rotational speed of P10 row is set at 3 000 R / min, and the load of P20 row

The connection form of parallel coupling planetary gear is shown in Figure 1, and each row has two parts connected.

Under the same basic working condition, the floating track of the sun wheel under three kinds of fault factors is

1. Simulation of planetary gear transmission system under fault free condition Using the established planetary gear dynamic model, when all

The effectiveness of arcmde features is verified by using the fault simulation experimental data of planetary gearbox. As shown in

The maximum meshing force reflects the maximum load of planetary gear. The dynamic load coefficient is the ratio of the

After the detailed grid data is predicted, if the output torque of P20 row is expressed as 1, then the

1. Physical model Take 2K-H Planetary gear transmission system as the analysis object, as shown in Fig. 1 (a). The

According to Newton’s second law, the dynamic equation of the system is established as follows Where I (I = R,

The internal excitation of planetary gear train is complex, and the power transmission path changes with the turnover of planetary

Due to the manufacturing accuracy, installation error, lubrication requirement and space reserved for the thermal expansion of gear teeth, the

Lyapunov exponent represents the average exponential divergence rate of the distance between two adjacent trajectories in the phase plane with

1.Time varying meshing stiffness When the gear is in transmission, the meshing tooth pair alternates between 1 and 2, the

The research object of the model is a two-stage planetary gear system, and the system diagram is shown in Figure

The time domain waveform of vibration data measured when the planetary gear is cracked is shown in Figure 1. It

In order to ensure the continuous operation, the meshing process of gears is actually the alternating meshing of single pair

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

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),

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

Before the study of the system, firstly, the system is simplified, and the sealed runway and rotor are regarded as

For the rotor with seals, when the rotor is running at high speed, some characteristics of the seal will affect

The rotor with contact seal is taken as the research object. The system is composed of rotor shaft, seal track,