scholarly journals New Method and Experiment for Detecting Relative Position and Posture of the Hydraulic Support

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 181842-181854 ◽  
Author(s):  
Yi Zhang ◽  
Hongyang Zhang ◽  
Kuidong Gao ◽  
Wenbo Xu ◽  
Qingliang Zeng
Keyword(s):  
Relative Position ◽  
New Method ◽  
Hydraulic Support

Application of Hilbert Marginal Spectrum to Coal-Rock Interface Recognition

2012 ◽  
Vol 569 ◽  
pp. 70-73 ◽  
Author(s):  
Bao Ping Wang ◽  
Zeng Cai Wang ◽  
Yong Juan Wang
Keyword(s):  
Waste Rock ◽  
New Method ◽  
Hydraulic Support ◽  
Marginal Spectrum ◽  
Rock Interface ◽  
Coal Rock ◽  
The Impact

In this paper, a new method based on Hilbert marginal spectrum is presented to solve the problem of coal-rock interface recognition in the top caving process. Coal or waste rock impinges against the tail beam of the hydraulic support. The impact causes the vibration of the tail beam. Because of different intrinsic characteristics, dissimilarities will exist between the two cases. The coal-rock interface is recognized by comparing the Hilbert marginal spectrum. The results show that the proposed method is a promising approach to identifying the coal-rock interface.

Development of a new method for assembling adjustable cylindrical joints

2020 ◽  
pp. 387-390
Author(s):  
M.E. Zakharova ◽  
D.R. Tarasov
Keyword(s):  
Relative Position ◽  
Horizontal Axis ◽  
New Method ◽  
Adhesive Compositions

А new method for assembling cylindrical joints with a horizontal axis of assembly using adhesive compositions with the ability to regulate the relative position of the mating parts was developed. A constructive scheme of the assembly using the developed method is proposed.

scholarly journals An Attitude Determination Method for Comprehensive Inspection Vehicle Based on Track Profile Registration

2017 ◽  
Vol 45 (4) ◽  
pp. 181
Author(s):  
Yumei Zhang ◽  
Dalin Zhang
Keyword(s):  
Relative Position ◽  
Attitude Determination ◽  
New Method ◽  
Determination Method ◽  
Matrix Inverse ◽  
Contact Measurement ◽  
The Road ◽  
The Matrix ◽  
Determination Methods

The attitude of the comprehensive inspection vehicle is one of the important factors that affect the accuracy of the inspection of metro line infrastructure, meanwhile the metro environment restricts the employment of common attitude determination methods. A new method of attitude determination is presented in this paper, which takes the track as reference and employs non-contact measurement to acquire the track profile simulta-neously. By registration of measurement track profile and the standard track profile, the relative position between the vehicle and the track reference can be calculated; and the instantaneous attitude of the vehicle can be determined by the matrix inverse calculation. The performance of the method is verified by an experiment using the road-rail comprehensive inspection vehicle.

scholarly journals Early Model of Vision-Based Obstacle Mapping Utilizing Grid-Edge-Depth Map

2019 ◽  
Vol 9 (2) ◽  
pp. 4519-4523
Keyword(s):  
Mobile Robot ◽  
Relative Position ◽  
Indoor Environment ◽  
Depth Map ◽  
Initial Position ◽  
Mapping Method ◽  
New Method ◽  
Early Model ◽  
Fixed Size ◽  
Mapping Process

This paper described a new method of obstacle mapping in an indoor environment utilizing a Grid-edge-depth map. The Grid-edge-depth map contained the information of distance and relative position of the object in the front of the robot. This mapping method utilized this information to mark off the visible obstacle/s in a particular virtual map. The 2D map created as a representative of the environment using a 300 by 500 pixels image. Every pixel represents a one by one cm of the environment and the obstacle's size. The obstacle's size was 30 by 30 pixels when it mapped by the system. It was a fixed size in the mapping process since the system cannot calculate the dimension of the detected obstacle. If the obstacle detected, the system checked its distance in GED-map. Then the system calculated the obstacle’s position against the goal, and finally map it in the 2D map. In this case, the proposed method in building a 2D map of the obstacle in the indoor environment combined with the rules to decide the direction of the mobile robot. The rules used to avoid the collision to the obstacle. The evaluation of the method showed that the system could map the detected obstacles, the initial position, and the goal’s relatif distance and position. The robot also reaches the goal position while avoiding the collision to the obstacle.

Systematic Odometry Error Modeling and Correction in Wheeled Robots

2013 ◽  
Vol 579-580 ◽  
pp. 675-679
Author(s):  
Zhong Da Yu ◽  
Yan Bo Pei ◽  
Dong Xiang Shao
Keyword(s):  
Relative Position ◽  
Model Experiment ◽  
Measuring Method ◽  
High Accuracy ◽  
Position Estimation ◽  
Error Modeling ◽  
New Method ◽  
Wheeled Robots ◽  
New Model ◽  
Robot Position

Odometry is a relative position measuring method widely used in robot position estimation. However, the error accumulates in an unbounded fashion. In this paper, a new model based on castors is proposed. The final pose accuracy is only affected by the position of castors according to the new model. Experiment is also conducted to demonstrate the feasibility and high accuracy of the new method.

A Method of Double-Side Displacment-Rotation Flat-Lapping with Solid Abrasives

2011 ◽  
Vol 291-294 ◽  
pp. 1752-1758
Author(s):  
Wen Yan ◽  
Yu Mei Huang ◽  
Feng Gao ◽  
Yao Liu
Keyword(s):  
Machine Tool ◽  
Velocity Distribution ◽  
Structural Characteristic ◽  
Relative Motion ◽  
Relative Position ◽  
Relative Velocity ◽  
New Method ◽  
Cnc Machine Tool ◽  
Motion Pattern ◽  
Cnc Machine

A method of double-side displacement-rotation flat-lapping with solid abrasives is proposed and a CNC machine tool is developed in this document. By analyzing the lapping principle and the structural characteristic of common solid abrasives flat-lapping method, the deficiencies of this method are indicated. The new method changes the motion pattern of workpiece in principle, the relative position between the workpiece and abrasive disks (lapping tools) are changed while the workpiece rotates. Therefore those deficiencies are made up radically, the lapping trace and velocity distribution of the relative motion between the workpiece and abrasive disks are more reasonable, the stress and wear states of isolating plate are improved as well. Finally, the driving moment and the speed of workpiece rotary are analyzed, and the relative velocity between the abrasive disks and workpiece is researched.

scholarly journals Relative Position and Posture Detection of Hydraulic Support Based on Particle Swarm Optimization

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 200789-200811
Author(s):  
Kuidong Gao ◽  
Wenbo Xu ◽  
Hongyang Zhang ◽  
Yi Zhang ◽  
Qingliang Zeng ◽  
...  
Keyword(s):  
Particle Swarm Optimization ◽  
Relative Position ◽  
Particle Swarm ◽  
Hydraulic Support ◽  
Swarm Optimization

The Study on Advancing Velocity of Hydraulic Support

2010 ◽  
Vol 97-101 ◽  
pp. 3753-3756
Author(s):  
Xin Zhang ◽  
Jian Wu Zhang ◽  
Li Rong Wan
Keyword(s):  
Modeling And Simulation ◽  
Flow Rate ◽  
Optimization Design ◽  
New Method ◽  
Pipe Diameter ◽  
Hydraulic Parameters ◽  
Simulation Technology ◽  
Hydraulic Support ◽  
Pump Station

Based on modeling and simulation technology, this paper puts forward a new method of studying quantitatively advancing velocity of hydraulic support, which is helpful to the optimization design of hydraulic support. Taking a certain type of hydraulic support as an example, the influence of hydraulic parameters such as flow rate, pressure, and pipe diameter on the advancing velocity of hydraulic support is analyzed. In order to increase advancing velocity, the flow rate of pump station and the diameter of main return pipe should be increased.

Selective Sampling and Orientation of Non-Homogeneous Tissues

1968 ◽  
Vol 26 ◽  
pp. 98-99
Author(s):  
C. C. Clawson ◽  
L. W. Anderson ◽  
R. A. Good
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Light Microscopy ◽  
Random Sampling ◽  
New Method ◽  
Microscope Examination ◽  
Small Areas ◽  
Selective Sampling ◽  
Large Numbers ◽  
Specific Orientation

Investigations which require electron microscope examination of a few specific areas of non-homogeneous tissues make random sampling of small blocks an inefficient and unrewarding procedure. Therefore, several investigators have devised methods which allow obtaining sample blocks for electron microscopy from region of tissue previously identified by light microscopy of present here techniques which make possible: 1) sampling tissue for electron microscopy from selected areas previously identified by light microscopy of relatively large pieces of tissue; 2) dehydration and embedding large numbers of individually identified blocks while keeping each one separate; 3) a new method of maintaining specific orientation of blocks during embedding; 4) special light microscopic staining or fluorescent procedures and electron microscopy on immediately adjacent small areas of tissue.

Sign in / Sign up

Export Citation Format

Share Document