Reproduction device for rocket sled track spectrum and method thereof

A rocket skid and track technology, applied in the field of motion simulator control, can solve problems such as small amount of calculation, model deviation, unstable control process, etc., and achieve the effects of saving time, high accuracy, and improving model expression ability

Active Publication Date: 2018-12-11
XI AN JIAOTONG UNIV
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The time-domain control method directly uses the time history signal obtained by actual measurement, and uses the controller to control the controlled system to track the expected response signal. This method has a small amount of calculation and a simple program, but it will be affected by noise and cause deviations in the model, and the control process will not be accurate. Stablize
[0004] In addition, due to skid-rail coupling, structural systems generally have nonlinear characteristics. Traditional control methods such as frequency response function or time-domain signal control methods are difficult to reproduce the desired road spectrum or waveform, which affects the experimental results.
Therefore, a new type of road spectrum reproduction device must be used, and there is no corresponding technology to achieve this purpose at present

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Reproduction device for rocket sled track spectrum and method thereof
  • Reproduction device for rocket sled track spectrum and method thereof
  • Reproduction device for rocket sled track spectrum and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0064] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", "end", "side" etc. is based on the Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0065] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Conn...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a reproduction device for a rocket sled track spectrum and a method thereof. A deep bidirectional cyclic neural network is used to construct a machine learning model, a plurality of groups of white noise excitation signals are constructed as model output, the excitation signals are applied to a bracket-track system and acceleration signals of one point on the track are collected as model input, and the model is trained and a structural response-excitation model is obtained; track random irregularity simulation is carried out based on a power spectral density function, and spatial power spectral density is converted to time domain signals by inverse discrete Fourier transform; expected spectrum signals are converted to acceleration signals and are inputted to a learning model to obtain expected excitation signals, the excitation signals are applied to the bracket-track system, and response point acceleration signals are collected and compared with an expected waveform for realizing track spectrum reproduction. Through setting the parameters of the algorithm and the layer number of the network structure, features of the structure can be better acquired, and anexcitation applying scheme with high accuracy can be given.

Description

technical field [0001] The invention belongs to the technical field of motion simulator control, and in particular relates to a reproducing device and method for a track spectrum of a rocket sled. Background technique [0002] The high-speed rocket sled test slide rail is a large-scale ground dynamic simulation equipment. The rocket sled test uses a rocket to propel the rocket sled installed with relevant test pieces and related accessories and test equipment to run at high speed on the slide rail. Its motion state is complex, and it is difficult to give good prediction results in theory and simulation calculations. Using the road spectrum reproduction device to carry out simulation experiments in the laboratory environment can better study the sled-rail coupling effect in the rocket sled motion. The road spectrum reproduction device includes an excitation system, a structural system and a control system. [0003] In the current literature, the road spectrum recurrence con...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01M99/00G06N3/04
CPCG01M99/00G06N3/045
Inventor 董龙雷李宇东周嘉明赵建平刘振官威
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products