Kinematics Analysis and Trajectory Planning of Segmentation Robot for Chilled Sheep Carcass

2021 ◽  
Vol 37 (6) ◽  
pp. 1147-1154
Author(s):  
Xiulan Bao ◽  
Leng Junsong ◽  
Jincheng Mao
Keyword(s):  
Trajectory Planning ◽  
Automatic Segmentation ◽  
Three Dimensional ◽  
Animal Husbandry ◽  
List Type ◽  
Three Dimensional Model ◽  
Robot System ◽  
Contour Segmentation ◽  
Before And After ◽  
Cutting Path

HighlightsAn automatic sheep segmentation robot system was developed to realize the automatic segmentation of chilled sheep carcass and improve the segmentation efficiency.The mechanical properties of mutton and lamb ribs were analyzed.The motion model of robot was established and the cutting path of sheep carcass was designed.Accurate segmentation of sheep carcass was realized.Abstract. With the quick development of animal husbandry, it is imperative to switch from extensive management to intensive operation. To improve the automation and quality of mutton segmentation, an automatic sheep segmentation robot system was developed in this article, which realizes the automatic segmentation of chilled sheep carcass and improves the segmentation efficiency of chilled sheep carcass. According to the technological requirements of sheep carcass segmentation, the cutting procedure of slaughtering chilled fresh sheep carcass was designed and the three-dimensional model of chilled fresh sheep carcass was established in reverse. A chilled fresh sheep carcass clamp was designed based on the characteristics of the profiling structure. Then the mechanical characteristics of chilled fresh mutton and sheep ribs were analyzed. Specifically, considering that the carcass of chilled fresh sheep is a viscous body, the shear test of chilled fresh mutton tissue was carried out. Thus, the kinematics model of segmentation robot was established. The workspace of the slaughtering robot was analyzed. Furthermore, the dynamic model of a slaughtering robot was established. The cutting track of the segmentation robot was designed and the sheep carcass cutting experiment was completed on the segmentation robot system. The mass of sheep carcass before and after cutting were 15.3 and 14.9 kg, respectively. The loss rate during cutting was 2.61%, which indicates the incision was smooth and the sheep carcass segmentation was accurate. The effectiveness of the sheep carcass segmentation robot was proved by experimental results. Keywords: Cutting force, Reverse modeling, Sheep contour, Segmentation robot, Trajectory planning.

Kinematics Simulation on the Centre of Sliding Universal Joints

2012 ◽  
Vol 150 ◽  
pp. 201-204
Author(s):  
De Gong Chang ◽  
C.C. Wang ◽  
B. Zuo
Keyword(s):  
Three Dimensional ◽  
Displacement Velocity ◽  
Dimensional Model ◽  
Universal Joint ◽  
Three Dimensional Model ◽  
Kinematic Simulation ◽  
Kinematics Simulation ◽  
Before And After ◽  
Universal Joints

This paper based on the improved twin tripod sliding universal joint and let it has the determined movement output. And create the three-dimensional model of twin tripod sliding universal joint before and after improved in software pro/e, and then put it into the simulation module, carry out the kinematic simulation of the tripod center on coupling. Obtained the curves of displacement, velocity and acceleration for two kinds of tripod centers.

scholarly journals ZONING TECHNOGENIC DISTURBED SOILS ON THE EXAMPLE OF THE OKINO-KLYUCHEVSKY BROWN COAL DEPOSIT

2019 ◽  
Vol 6 (1) ◽  
pp. 172-179
Author(s):  
Ai-Kherel Ondar ◽  
Kirill Kalashnikov
Keyword(s):  
Brown Coal ◽  
Vegetation Cover ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Coal Deposit ◽  
Three Dimensional Model ◽  
Environmental Situation ◽  
Before And After ◽  
Zone Development ◽  
Disturbed Soils

The article analyzes the existing environmental situation at the site of production of brown coal Okino-Klyuchevsky brown coal Deposit. The state of soil and vegetation cover of the Deposit and adjacent territories is estimated. A three-dimensional model of the relief of the Deposit and adjacent territory before and after development is presented. As a result, the zoning of the deposits in the zone "development", "conservation", "improvements".

scholarly journals Equipment Layout Optimization Based on Human Reliability Analysis of Cabin Environment

2021 ◽  
Vol 9 (11) ◽  
pp. 1263
Author(s):  
Xiangbin Meng ◽  
Hai Sun ◽  
Jichuan Kang
Keyword(s):  
Reliability Analysis ◽  
Early Stage ◽  
Three Dimensional ◽  
Layout Optimization ◽  
Human Reliability ◽  
Three Dimensional Model ◽  
Human Reliability Analysis ◽  
Probability Of Success ◽  
Before And After ◽  
Cabin Environment

There are many factors involved in the layout optimization of cabin equipment, and human factors should be considered in the early stage of layout design. Human reliability is an effective index to evaluate the probability of success of the human completion of tasks. In order to put forward the method of human reliability which is more suitable for the layout optimization of cabin equipment, the existing methods of human reliability analysis (HRA) are systematically studied. At the same time, taking HRA, equipment correlation and cabin balance as objective functions, the optimization problem of cabin equipment layout was quantified into a mathematical model. When solving the model, the visibility graph method was used to model the cabin path planning, and a solution platform for the optimization of cabin equipment layout was developed on the basis of a genetic algorithm. Finally, the developed platform was applied with a ship example, and the results before and after the layout optimization were displayed through a three-dimensional model. At the same time, equipment layout evaluation software was used to simulate the experimental results so as to compare the improvement of important parameters before and after the layout optimization.

scholarly journals Evaluation of anterior inferior iliac spine impingement after hip arthroscopic osteochondroplasty using computer simulation analysis

2020 ◽  
Vol 28 (2) ◽  
pp. 230949902093553
Author(s):  
Naomi Kobayashi ◽  
Hyonmin Choe ◽  
Hiroyuki Ike ◽  
Shota Higashihira ◽  
Daigo Kobayashi ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Simulation Software ◽  
Anterior Inferior Iliac Spine ◽  
Three Dimensional Model ◽  
Inferior Aspect ◽  
Before And After ◽  
Acetabular Side ◽  
Cam Morphology

Background: Anterior inferior iliac spine (AIIS) impingement is an important risk factor for revision hip arthroscopy. Although a morphological classification system is available, evaluating AIIS impingement with respect to joint kinematics remains a challenge. Purpose: To use computer simulation analysis to ascertain the prevalence of AIIS impingement before and after osteochondroplasty. Methods: A total of 35 joints from 30 cases (20 males and 10 females; average age: 43.3 ± 13.7 years) were analyzed. All joints had cam morphology and underwent hip arthroscopic osteochondroplasty. A three-dimensional model of each joint was constructed pre- and postoperatively. Joint kinematic simulation software (ZedHip®, Lexi, Tokyo) was used to identify the impingement point on the acetabular side and the incidence (expressed as a percentage) of AIIS impingement calculated. Radiographic and clinical evaluation was performed pre- and postoperatively. Results: AIIS impingement was observed postoperatively in six joints but preoperatively in only one joint. The rate of AIIS postoperative impingement was significantly higher than that of preoperative impingement. All impingement points were located on the inferior aspect of the AIIS apex. However, there were no significant differences between the AIIS impingement and non-impingement groups in terms of clinical outcome. Conclusion: The incidence of AIIS impingement after osteochondroplasty was 17% by computer simulation analysis. Osteochondroplasty may result in subsequent AIIS impingement.

scholarly journals Role of organizational learning and knowledge management

2017 ◽  
Vol 8 (3) ◽  
pp. 19-32
Author(s):  
Fazal Haleem
Keyword(s):  
Knowledge Management ◽  
Organizational Learning ◽  
Three Dimensional ◽  
Three Dimensional Model ◽  
Organization Capacity ◽  
Manufacturing Company ◽  
Before And After ◽  
Low Performance

AbstractThis research is based on Electrocell, a US battery manufacturing company, which was facing problems in its marketing and sales departments as evidenced by its low performance. Following a short introduction to the firm, literature reviews the two recently emerged and widely debated topics, that is, organizational learning and knowledge management. It is followed by the reasons for Electrocell’s declination and revival before and after acquisition by Restart, a US cosmetic manufacturing company. Then, Knowledge Sharing Model, General Hierarchical Model of Organizational Commitment, Knowledge Management, and Learning Organization Capacity, and Three Dimensional Model are described and critically analyzed. At the end, Knowledge Management System Conceptual Model is applied on the case study thoroughly and critically analyzed followed by summary. The research contributes to the literature and offers important implications for academics, managers and strategists that why learning is important and how does it matter to an organization.

scholarly journals Large-scale Network Survivability Mathematical Association Model under Set Pair Analysis Theory

2021 ◽  
Vol 2083 (4) ◽  
pp. 042043
Author(s):  
Jiayi Li ◽  
Xiaoqing Zhu
Keyword(s):  
Trajectory Planning ◽  
Large Scale ◽  
Three Dimensional ◽  
Legged Robots ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Large Scale Network ◽  
Analysis Theory ◽  
Scale Network ◽  
Eccentric Wheel

Abstract With the expansion of the application field of robots, the use of eight-legged bionic robots to assist or replace human operations in various complex and extreme terrains is constantly being explored. This paper uses octopus as a bionic object, designs an eight-eccentric wheel walking platform, and studies its dynamics, kinematics and trajectory planning. This paper first investigates the development history and research status of multi-legged robots in many countries, analyzes the shortcomings of octa-legged robots, and proposes improved solutions on this basis. Through the bionic of the octopus structure, the Catia software is used to design and establish a three-dimensional model of the octopus-like eight-eccentric wheel robot. By importing the three-dimensional model into the dynamic analysis software Adams for simulation, after adding constraints, driving, torque and contact force, the various functions of the platform are simulated to obtain linear wheel walking, rotary motion, linear leg walking, the parameters of jumping motion and obstacle-crossing motion are drawn into tables for intuitive analysis, and virtual prototype simulation is used to verify the correctness of the established model and trajectory planning. The research in this paper lays a theoretical foundation for the development and application of this eight-eccentric wheel bionic robot.

Development and Testing of a Cam Disc Comb-Type Picking Machine for Chrysanthemum (Dendranthema morifolium Ramat. Tzvelev)

2021 ◽  
Vol 64 (6) ◽  
pp. 1967-1976
Author(s):  
Rongyan Wang ◽  
Zhian Zheng ◽  
Lei Gao ◽  
Andi Chen ◽  
Shanyu Wang ◽  
...  
Keyword(s):  
Rotational Speed ◽  
Power Transmission ◽  
Three Dimensional ◽  
Field Tests ◽  
Physical Parameters ◽  
List Type ◽  
Three Dimensional Model ◽  
Structure And Motion ◽  
Breakage Rate ◽  
Drop Rate

HighlightsA practical cam disc comb-type chrysanthemum picking machine was developed.A three-dimensional model of the picking machine was designed in SolidWorks.The working principle and motion trajectory of the picking comb teeth were analyzed.The best working parameters of the picking machine were obtained with field tests.Abstract. Aiming at the problems of labor, picking efficiency, and mechanization, a small practical cam disc comb-type chrysanthemum picking machine was designed. The picking machine, mainly composed of a wheeled frame, power transmission system, cam disc, picking comb, and cleaning comb sleeve, uses the pulling force of comb teeth to pick chrysanthemum flowers. The comb teeth rotate on a central shaft, and their swing angle is determined by a groove on the cam disc. One rotation of the comb teeth completes the process of picking, lifting, and unloading. In this study, the parameters of the cam profile were designed using an analytical method. To ensure reliability of the components, the trajectory of the comb teeth and their structure and motion parameters were analyzed, and the conditions for picking chrysanthemums were determined. The physical parameters of chrysanthemum plants were measured, and a prototype picking machine was built. Field tests were conducted using the comb rotational speed, comb teeth spacing, and comb working depth as the test factors and the picking rate, impurity rate, breakage rate, and drop rate as the evaluation indexes. The effects of each factor and the interaction of any two factors on the picking effectiveness were obtained. The test results suggested that the most effective harvesting was achieved when the comb rotational speed was 40 rpm, the comb teeth spacing was 8 mm, and the comb working depth was 200 mm. With these parameters, the picking rate was 93.28%, the breakage rate was 1.21%, the impurity rate was 8.38%, and the drop rate was 6.61%. The prototype machine achieved good picking effectiveness, and this study provides a technical foundation for the realization of mechanized chrysanthemum harvesting. Keywords: Cam, Chrysanthemum, Comb teeth, Motion track, Picking machine.

Numerical Study on Self-Consistency Centering Process of Periodic Symmetric Struts Support

2011 ◽  
Vol 462-463 ◽  
pp. 1373-1378
Author(s):  
Ji Zhe Hai ◽  
Mamtimin Gheni ◽  
Wei Bing Liu ◽  
Wei Chen ◽  
Lie Yu
Keyword(s):  
Thermal Deformation ◽  
Transfer Problem ◽  
Numerical Study ◽  
Numerical Models ◽  
Three Dimensional ◽  
Internal Flow ◽  
Three Dimensional Model ◽  
Temperature State ◽  
Before And After ◽  
The Impact

In this paper，the simplified three-dimensional model of Periodic Symmetric Struts Support (PSSS) was established, which is applied to a certain type of gas turbine. The software of computational fluid Dynamics (CFD) and the standard k-ε turbulence model are used in the numerical simulation．To simulate the coupling problems of fluid and solid，the numerical models by considering the heat transfer problem coupling with the solid and fluid have been developed．The internal flow field in PSSS was numerically simulated by an effective method for solving integrated coupling problems. The temperature field and thermal deformation rule of the PSSS was obtained. Through comparison coordinate values of the checked points before and after thermal deformation, the impact of thermal deformation on bearing center level height under temperature load was studied. The centering process of the PSSS at high temperature state was verified.

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