scholarly journals Computer-aided Efficient Design and Performance Optimization of Cutting Head for Roadheader

2022 ◽  
Author(s):  
Xin Jin ◽  
Guochao Zhao ◽  
Lijuan Zhao ◽  
Guocong Lin
Keyword(s):  
Performance Optimization ◽  
Structural Parameters ◽  
Virtual Prototype ◽  
Cutting Performance ◽  
Efficient Design ◽  
Cutting Head ◽  
Computer Aided ◽  
Coal Rock ◽  
Virtual Prototype Technology ◽  
And Performance

Abstract The cutting head is the core working mechanism of the roadheader for coal-rock materials cutting. The efficient and high performance design of cutting head is the key to improve the road head digging and mining technology. In this paper, based on cutting head design theory and virtual prototype technology, we propose a computer-aided structure design and performance optimization method for cutting head. We compile the calculation code and realize the reading and storing of relevant data through Excel. In particular, to obtain more realistic cutting performance data of the cutting head, we construct a coupling model of cutting head cutting rock wall based on virtual prototype technology, and then establish a database matching structural parameters, working parameters, coal-rock properties and cutting performance through extensive simulations. Based on the method, we complete the design of EBZ220 roadheader cutting head. We show that our method can realize the fast and efficient design of cutting head, and the designed cutting head has good working performance.

DESIGN OF A SONIC DRILL BASED ON VIRTUAL PROTOTYPE TECHNOLOGY

2013 ◽  
Vol 37 (2) ◽  
pp. 185-196 ◽  
Author(s):  
Yu Wang ◽  
Baolin Liu ◽  
Qin Zhou ◽  
Yuanbiao Hu ◽  
Guomin Li
Keyword(s):  
Collision Detection ◽  
Structural Parameters ◽  
Virtual Prototyping ◽  
Virtual Prototype ◽  
Operating Conditions ◽  
Model Search ◽  
Design Cycle ◽  
Virtual Prototype Technology ◽  
Multi Body

Sonic drilling is a novel sampling technology applied in many fields. Based on SolidWorks software, a dynamics virtual prototyping is utilized to develop a physical sonic driller by demonstrating collision detection and optimizing overall layout and key component structures. Key hydraulic and structural parameters are optimized using a mathematical model. Search for the optimized parameters and operating conditions for this multi-body mechanical system is conducted experimentally. The practical results show that the virtual prototype technology not only shortens the design cycle but also improves the quality of the conventional design. The new sonic driller designed by this method is both environmentally friendly and smarter.

Virtual Simulation of Embedded-Vane Rotary Compressor

2011 ◽  
Vol 189-193 ◽  
pp. 2219-2223
Author(s):  
Kui Hua Geng ◽  
Meng Tang ◽  
Ai Nong Geng ◽  
Hong Dong Yu ◽  
Hai Ying Qin
Keyword(s):  
Theoretical Analysis ◽  
Virtual Prototype ◽  
Virtual Simulation ◽  
Rotary Compressor ◽  
Motion Simulation ◽  
Simulation Based ◽  
Motion Characteristic ◽  
Virtual Prototype Technology ◽  
And Performance

By using virtual prototype technology, a model of Embedded Vane Rotary Compressor has been established for motion simulation. Based on theoretical analysis and simulation, the motion characteristic, forces and connection constraints was studied and analyzed. The results are helpful for improving the design and performance of the compressor.

Research on Characteristics of a New Marine Gas Turbine Exhaust Ejector Device

2016 ◽  
Author(s):  
Tao Sun ◽  
Lanxin Sun ◽  
Yigang Luan ◽  
Peng Sun
Keyword(s):  
Gas Turbine ◽  
Performance Optimization ◽  
Structural Parameters ◽  
Research Result ◽  
Exhaust System ◽  
Reference Value ◽  
Multi Stage ◽  
Gas Turbine Exhaust ◽  
And Performance ◽  
Turbine Exhaust

Naval ships, as well as commercial ships, are exposed to more risks than before with the development of IR-guided threats. IR Suppress System (IRSS) is used to reduce or eliminate the infrared signatures of exhaust system of the ship. In order to optimize the structure of exhaust ejector and shorten the cycle of research, it is essential to study the successful experiences on exhaust ejectors by scholars abroad. In this article two structure innovations are introduced: an improved structure of nozzle and multi-stage diffuser; A new type of exhaust ejector for marine gas turbine is designed. Through simplifying the ejector model, numerical simulation is applied to forecast the characteristics of both the single-stage ejector and the multistage ejector. Result indicates the effects of structural parameters on the performance parameters. This research result has certain reference value for marine gas turbine exhaust ejector design and performance optimization.

Design of vibration damping test mechanism for suspension system of high speed tracked vehicle based on vertical linkage decoupling

2021 ◽  
pp. 095440622110424
Author(s):  
Xuedong Liu ◽  
Yong Guo ◽  
Zhewu Chen ◽  
Juchuan Dai ◽  
Qihui Lin ◽  
...  
Keyword(s):  
Performance Optimization ◽  
High Speed ◽  
Performance Testing ◽  
Virtual Prototype ◽  
Vibration Damping ◽  
Suspension System ◽  
Contact Theory ◽  
Prototype Model ◽  
Tracked Vehicle ◽  
And Performance

The suspension test-rig is restricted by the compound swing motion of the load wheel in a high-speed tracked vehicle, and cannot test the damping performance for the suspension system of the high-speed tracked vehicle with the track. A vibration damping testing mechanism using vertical linkage to decouple the compound swing motion of the load wheel is proposed for suspension performance testing with the track. Using Hertz elastic contact theory to solve the stiffness coefficient between load wheel and excitation wheel, a virtual prototype model for vibration damping test mechanism with vertical linkage is established in ADAMS. Correctness of the virtual prototype model is verified by experiment. The motion decoupling ability of the vibration damping testing mechanism is verified by simulation. The dynamic characteristics for each pair of guide and slider in vibration damping testing mechanism are analyzed under the condition of maximum excitation force and displacement, and the selection criteria of slider and guide contained in the motion pair components are acquired. The mechanism decouples the compound swing motion of the load wheel successfully, and can make suspension system performance testing in high-precision for the high-speed tracked vehicle with track realized, playing an important role in parameters design and performance optimization for the high-speed tracked vehicle.

Breast Cancer Detection and Classification using Traditional Computer Vision Techniques: A Comprehensive Review

2020 ◽  
Vol 16 ◽  
Author(s):  
Saliha Zahoor ◽  
Ikram Ullah Lali ◽  
Muhammad Attique Khan ◽  
Kashif Javed ◽  
Waqar Mehmood
Keyword(s):  
Breast Cancer ◽  
Computer Aided Diagnosis ◽  
Diagnose Breast Cancer ◽  
Initial Stage ◽  
Computer Aided ◽  
Diagnosis And Classification ◽  
And Performance ◽  
Tools And Techniques ◽  
Aided Diagnosis

: Breast Cancer is a common dangerous disease for women. In the world, many women died due to Breast cancer. However, in the initial stage, the diagnosis of breast cancer can save women's life. To diagnose cancer in the breast tissues there are several techniques and methods. The image processing, machine learning and deep learning methods and techniques are presented in this paper to diagnose the breast cancer. This work will be helpful to adopt better choices and reliable methods to diagnose breast cancer in an initial stage to survive the women's life. To detect the breast masses, microcalcifications, malignant cells the different techniques are used in the Computer-Aided Diagnosis (CAD) systems phases like preprocessing, segmentation, feature extraction, and classification. We have been reported a detailed analysis of different techniques or methods with their usage and performance measurement. From the reported results, it is concluded that for the survival of women’s life it is essential to improve the methods or techniques to diagnose breast cancer at an initial stage by improving the results of the Computer-Aided Diagnosis systems. Furthermore, segmentation and classification phases are challenging for researchers for the diagnosis of breast cancer accurately. Therefore, more advanced tools and techniques are still essential for the accurate diagnosis and classification of breast cancer.

scholarly journals SWIPT in mMIMO system with non-linear energy-harvesting terminals: protocol design and performance optimization

2019 ◽  
Vol 2019 (1) ◽  
Author(s):  
Kui Xu ◽  
Ming Zhang ◽  
Jie Liu ◽  
Nan Sha ◽  
Wei Xie ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Performance Optimization ◽  
Power Transmission ◽  
Base Station ◽  
Second Phase ◽  
Wireless Power ◽  
Half Duplex ◽  
Non Linear ◽  
Two Phases ◽  
And Performance

Abstract In this paper, we design the simultaneous wireless information and power transfer (SWIPT) protocol for massive multi-input multi-output (mMIMO) system with non-linear energy-harvesting (EH) terminals. In this system, the base station (BS) serves a set of uplink fixed half-duplex (HD) terminals with non-linear energy harvester. Considering the non-linearity of practical energy-harvesting circuits, we adopt the realistic non-linear EH model rather than the idealistic linear EH model. The proposed SWIPT protocol can be divided into two phases. The first phase is designed for terminals EH and downlink training. A beam domain energy beamforming method is employed for the wireless power transmission. In the second phase, the BS forms the two-layer receive beamformers for the reception of signals transmitted by terminals. In order to improve the spectral efficiency (SE) of the system, the BS transmit power- and time-switching ratios are optimized. Simulation results show the superiority of the proposed beam-domain SWIPT protocol on SE performance compared with the conventional mMIMO SWIPT protocols.

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