scholarly journals Row End Detection and Headland Turning Control for an Autonomous Banana-Picking Robot

Machines ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 103
Author(s):  
Peichen Huang ◽  
Lixue Zhu ◽  
Zhigang Zhang ◽  
Chenyu Yang
Keyword(s):  
Visual Perception ◽  
Machine Vision ◽  
Experimental Test ◽  
Navigation System ◽  
Test Results ◽  
Matlab Simulation ◽  
Time Space ◽  
Tracking Controller ◽  
Turning Control ◽  
Posture Adjustment

A row-following system based on machine vision for a picking robot was designed in our previous study. However, the visual perception could not provide reliable information during headland turning according to the test results. A complete navigation system for a picking robot working in an orchard needs to support accurate row following and headland turning. To fill this gap, a headland turning method for an autonomous picking robot was developed in this paper. Three steps were executed during headland turning. First, row end was detected based on machine vision. Second, the deviation was further reduced before turning using the designed fast posture adjustment algorithm based on satellite information. Third, a curve path tracking controller was developed for turning control. During the MATLAB simulation and experimental test, different controllers were developed and compared with the designed method. The results show that the designed turning method enabled the robot to converge to the path more quickly and remain on the path with lower radial errors, which eventually led to reductions in time, space, and deviation during headland turning.

Advanced railgun experimental test results and implications for the future

1992 ◽  
Author(s):  
M. HOLLAND ◽  
P. EGGERS ◽  
S. GUINTO ◽  
R. STEVENSON ◽  
GREGORY COLOMBO
Keyword(s):  
Experimental Test ◽  
Test Results ◽  
The Future

On axial compressive behavior of steel fiber reinforced concrete confined by FRP

2021 ◽  
pp. 136943322098165
Author(s):  
Hossein Saberi ◽  
Farzad Hatami ◽  
Alireza Rahai
Keyword(s):  
Reinforced Concrete ◽  
Experimental Test ◽  
Steel Fiber ◽  
Experimental Tests ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Test Results ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Frp Confinement

In this study, the co-effects of steel fibers and FRP confinement on the concrete behavior under the axial compression load are investigated. Thus, the experimental tests were conducted on 18 steel fiber-reinforced concrete (SFRC) specimens confined by FRP. Moreover, 24 existing experimental test results of FRP-confined specimens tested under axial compression are gathered to compile a reliable database for developing a mathematical model. In the conducted experimental tests, the concrete strength was varied as 26 MPa and 32.5 MPa and the steel fiber content was varied as 0.0%, 1.5%, and 3%. The specimens were confined with one and two layers of glass fiber reinforced polymer (GFRP) sheet. The experimental test results show that simultaneously using the steel fibers and FRP confinement in concrete not only significantly increases the peak strength and ultimate strain of concrete but also solves the issue of sudden failure in the FRP-confined concrete. The simulations confirm that the results of the proposed model are in good agreement with those of experimental tests.

Navigation System for Olfactory Mobile Robot by Using Machine Vision System

2021 ◽  
Author(s):  
Gamma Aditya Rahardi ◽  
Khairul Anam ◽  
Ali Rizal Chaidir ◽  
Devita Ayu Larasati
Keyword(s):  
Machine Vision ◽  
Mobile Robot ◽  
Navigation System ◽  
Vision System ◽  
Machine Vision System

FRP Reinforcement to Retrofit Bridge Pier After Repair: Experimental Test Results

2021 ◽  
pp. 449-458
Author(s):  
Junqing Xue ◽  
Davide Lavorato ◽  
Gabriele Fiorentino ◽  
Alessandro Vittorio Bergami ◽  
Bruno Briseghella ◽  
...  
Keyword(s):  
Experimental Test ◽  
Bridge Pier ◽  
Test Results ◽  
Frp Reinforcement

The Experimental Test Results of a Two-Section Linear Induction Launcher

2020 ◽  
Vol 48 (11) ◽  
pp. 4041-4047
Author(s):  
Cagdas Tunceroglu ◽  
Ugur Hasirci ◽  
Dincer Maden ◽  
Abdulkadir Balikci
Keyword(s):  
Experimental Test ◽  
Test Results ◽  
Linear Induction

A General Model for Two-Point Contact Dry-Friction Whip and Whirl: Further Advancements and Experimental Test Results

2015 ◽  
Author(s):  
Jason C. Wilkes ◽  
Tim Allison
Keyword(s):  
Experimental Test ◽  
General Model ◽  
Dry Friction ◽  
Point Contact ◽  
Current Work ◽  
Test Results ◽  
Air Bearings ◽  
Test Rig ◽  
Single Location ◽  
Arbitrary Phase

Numerous papers have investigated the behavior of dry-friction whip and whirl; most of them consider contact between a rotor and stator at a single location. For rotors running on multiple magnetic bearings, air bearings, or bushings, equipment failure may result in rub at more than one location. For these cases, it is important to have an analytical model that characterizes possible regions of two-point contact dry-friction whip and whirl. The current work presents a general model to predict possible whirl regions for multi-contact dry-friction whip and whirl, allowing for an arbitrary phase between contact locations. In theory this method can be applied to more than two contact locations; however, a two-point contact example case is developed and compared to results from an experimental test rig developed to demonstrate multi-contact dry-friction whip and whirl in the current work.

Advanced railgun experimental test results and implications for the future

1993 ◽  
Vol 29 (1) ◽  
pp. 419-424 ◽  
Author(s):  
M.M. Holland ◽  
P.D. Eggers ◽  
S. Guinto ◽  
R.D. Stevenson ◽  
G. Columbo
Keyword(s):  
Experimental Test ◽  
Test Results ◽  
The Future

scholarly journals Bearing Capacity of Circular Footing on Sand Deposit

2015 ◽  
Vol 773-774 ◽  
pp. 1518-1523 ◽  
Author(s):  
Aminaton Marto ◽  
Mohsen Oghabi ◽  
Nor Zurairahetty Mohd Yunus
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Experimental Test ◽  
Static Load ◽  
Sandy Soils ◽  
Soil Parameters ◽  
Test Results ◽  
Finite Element Software ◽  
Sand Deposit ◽  
Circular Footing

Bearing capacity and settlement are two important parameters in geotechnical engineering. The bearing capacity of circular foundations on sandy soils is important to geotechnical practicing engineers. Design of foundations includes soil parameters and bearing capacity of foundation. This paper presents the results of laboratory experimental model tests of circular footings supported on sand deposit under static load. The finite element software Abaqus is used to compare the results. The effects of the relative density of the sand (30%, 50%, and 70%) and the diameter of circular footing (75 mm and 100 mm) are investigated. It can be concluded that the experimental test results fit quite well with the results of numerical method.

Sign in / Sign up

Export Citation Format

Share Document