scholarly journals Deep Neural Network for Automatic Image Recognition of Engineering Diagrams

2020 ◽  
Vol 10 (11) ◽  
pp. 4005 ◽  
Author(s):  
Dong-Yeol Yun ◽  
Seung-Kwon Seo ◽  
Umer Zahid ◽  
Chul-Jin Lee
Keyword(s):  
Detection Method ◽  
Recognition Performance ◽  
Control Logic ◽  
Convolutional Network ◽  
Data Annotation ◽  
Adaptive Clustering ◽  
Symbolic Information ◽  
Sequential Image ◽  
Automatic Image Recognition ◽  
And Control

Piping and instrument diagrams (P&IDs) are a key component of the process industry; they contain information about the plant, including the instruments, lines, valves, and control logic. However, the complexity of these diagrams makes it difficult to extract the information automatically. In this study, we implement an object-detection method to recognize graphical symbols in P&IDs. The framework consists of three parts—region proposal, data annotation, and classification. Sequential image processing is applied as the region proposal step for P&IDs. After getting the proposed regions, the unsupervised learning methods, k-means, and deep adaptive clustering are implemented to decompose the detected dummy symbols and assign negative classes for them. By training a convolutional network, it becomes possible to classify the proposed regions and extract the symbolic information. The results indicate that the proposed framework delivers a superior symbol-recognition performance through dummy detection.

scholarly journals Neoteric Fuzzy control stratagem and design of Chopper fed Multilevel Inverter for enhanced Voltage Output involving Plug-In Electric Vehicle (PEV) applications

Electronics ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 1092 ◽  
Author(s):  
Sunddararaj ◽  
Rangarajan ◽  
Gopalan
Keyword(s):  
Electric Vehicle ◽  
New Technologies ◽  
Control Strategies ◽  
Economic Benefits ◽  
Multilevel Inverter ◽  
Control Logic ◽  
Bidirectional Converters ◽  
Hybrid Controller ◽  
And Control ◽  
Novel Design

The utilization of plug-in electric vehicles (PEV) has started to garner more attention worldwide considering the environmental and economic benefits. This has led to the invention of new technologies and motifs associated with batteries, bidirectional converters and inverters for Electric Vehicle applications. In this paper, a novel design and control of chopper circuit is proposed and configured with the series and parallel connection of the power electronic based switches for two-way operation of the converter. The bidirectional action of the proposed converter makes it suitable for plug-in electric vehicle applications as the grid is becoming smarter. The DC–DC converter is further interfaced with the designed multilevel inverter (MLI). The reduced switches associated with the novel design of MLI have overcome the cons associated with the conventional inverters in terms of enhanced performance in the proposed design. Further, novel control strategies have been proposed for the DC–DC converter based on Proportional Integral (PI) and Fuzzy based control logic. For the first time, the performance of the entire system is evaluated based on the comparison of proposed PI, fuzzy, and hybrid controllers. New rules have been formulated for the Fuzzy based controllers that are associated with the Converter design. This has further facilitated the interface of bidirectional DC–DC converter with the proposed MLI for an enhanced output voltage. The results indicate that the proposed hybrid controller provides better performance in terms of voltage gain, ripple, efficiency and overall aspects of power quality that forms the crux for PEV applications. The novelty of the design and control of the overall topology has been manifested based on simulation using MATLAB/SIMULINK.

LSI Microcomputer and Digital Control

1975 ◽  
Vol 97 (2) ◽  
pp. 149-156 ◽  
Author(s):  
I. Lee
Keyword(s):  
Digital Control ◽  
Historical Background ◽  
Control System Design ◽  
Future Trends ◽  
Digital Control System ◽  
Control Logic ◽  
Present Trend ◽  
Potential Impact ◽  
Microprocessor Technology ◽  
And Control

This paper gives a tutorial presentation and overview of LSI microprocessor technology for control engineers and control logic designers. The historical background, present status and future trends of this dynamic technology are presented, and its enormous potential impact on digital control system design and implementation is explored through examples and extrapolation of the present trend.

A prey–predator model and control of a nematodes pest using control in banana: Mathematical modeling and qualitative analysis

2021 ◽  
pp. 2150089
Author(s):  
Sudhakar Yadav ◽  
Vivek Kumar
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Local Stability ◽  
Detection Method ◽  
Initial Release ◽  
Pest Detection ◽  
Predator Model ◽  
And Control ◽  
The Mathematical Model ◽  
Theoretical Results

This study develops a mathematical model for describing the dynamics of the banana-nematodes and its pest detection method to help banana farmers. Two criteria: the mathematical model and the type of nematodes pest control system are discussed. The sensitivity analysis, local stability, global stability, and the dynamic behavior of the mathematical model are performed. Further, we also develop and discuss the optimal control mathematical model. This mathematical model represents various modes of management, including the initial release of infected predators as well as the destroying of nematodes. The theoretical results are shown and verified by numerical simulations.

scholarly journals Development of a Hybrid Electric Vehicle Simulation Tool with a Rule-Based Topology

2021 ◽  
Vol 11 (23) ◽  
pp. 11319
Author(s):  
Hyun Woo Won
Keyword(s):  
Hybrid Electric Vehicle ◽  
Hybrid Simulation ◽  
Rule Base ◽  
Simulation Tool ◽  
Control Logic ◽  
Rule Based ◽  
Vehicle Simulation ◽  
Wide Range ◽  
Hybrid Electric ◽  
And Control

The performance of hybrid electric vehicles (HEVs) greatly depends on the various sub-system components and their architecture, and designers need comprehensive reviews of HEVs before vehicle investigation and manufacturing. Simulations facilitate development of virtual prototypes that make it possible to rapidly see the effects of design modifications, avoiding the need to manufacture multiple expensive physical prototypes. To achieve the required levels of emissions and hardware costs, designers must use control strategies and tools such as computational modeling and optimization. However, most hybrid simulation tools do not share their principles and control logic algorithms in the open literature. With this motivation, the author developed a hybrid simulation tool with a rule-based topology. The major advantage of this tool is enhanced flexibility to choose different control and energy management strategies, enabling the user to explore a wide range of hybrid topologies. The tool provides the user with the ability to modify any sub-system according to one’s own requirements. In addition, the author introduces a simple logic control for a rule-base strategy as an example to show the flexibility of the tool in allowing the adaptation of any logic algorithm by the user. The results match the experimental data quite well. Details regarding modeling principle and control logic are provided for the user’s benefit.

Online Biscuit Detection System Based on Machine Vision

2013 ◽  
Vol 341-342 ◽  
pp. 597-600
Author(s):  
Xin Wei ◽  
Guang Feng Chen ◽  
Lin Lin Zhai ◽  
Qing Qing Huang
Keyword(s):  
Machine Vision ◽  
Detection Rate ◽  
Detection System ◽  
Control Logic ◽  
Control Software ◽  
Matching Algorithm ◽  
Geometric Matching ◽  
Detection Software ◽  
And Control ◽  
Manipulator Control

In order to complete the automated sorting, the manipulator needs the accurate coordinate and angle information of the biscuits. This article design a machine vision based online biscuit detection system. Devise the hardware structure and control logic. Base on geometric matching algorithm, develop the detection software with NI Vision. The software could acquire video to analysis to get the coordinates of biscuits, and update and exchange the data with manipulator control software. The system has been tested to achieve a complete detection rate about 96%.

scholarly journals A Dedicated Design Strategy for Active Boring Bar

2019 ◽  
Vol 9 (17) ◽  
pp. 3541 ◽  
Author(s):  
Niccolò Grossi ◽  
Lisa Croppi ◽  
Antonio Scippa ◽  
Gianni Campatelli
Keyword(s):  
Operating Conditions ◽  
Dynamic Characterization ◽  
Control Logic ◽  
Boring Bar ◽  
Actuation System ◽  
Static Equivalence ◽  
And Control ◽  
Cutting System ◽  
Damping Systems ◽  
Critical Aspects

Unstable vibrations (i.e., chatter) onset is one of the main limits to productivity in deep boring bar processes. Active damping systems allow to increase machining stability in different configurations (i.e., tool setup), without requiring cutting system dynamic characterization. Design of an active boring bar involves the development of monitoring system (sensors), actuation system and control logic. While several control logics were evaluated and discussed, few design solutions were presented in the literature, focusing only on building prototypes to demonstrate control logic effectiveness. In the presented work, a deep analysis of the main issues and requirements related to active boring design was carried out and a systematic approach to tackle all the critical aspects was developed. The results of the proposed method are: (i) optimal actuators positioning able to damp vibration along two directions; (ii) preload system design guaranteeing the correct actuator preloading for the operating conditions; (iii) covers design to protect actuators and ensure the dynamic and static equivalence between active and standard boring bar. Following this approach, an active boring bar was designed, realized and tested. The results prove the required equivalence between active and original boring bar and assess the damping effect.

Net structure and control logic synthesis of controlled Petri nets

1998 ◽  
Vol 43 (10) ◽  
pp. 1446-1450 ◽  
Author(s):  
Chen Haoxun
Keyword(s):  
Petri Nets ◽  
Logic Synthesis ◽  
Control Logic ◽  
And Control

Research on the Application of New Active Inverter Technology in Battery Maintenance

2013 ◽  
Vol 448-453 ◽  
pp. 2077-2084
Author(s):  
Bing Yu Li ◽  
Ke Xu ◽  
Yun Ming Li ◽  
Xuan Yi Li
Keyword(s):  
Pulse Width Modulation ◽  
Detection Method ◽  
Power Station ◽  
Inspection Method ◽  
Discharge System ◽  
Passive Detection ◽  
Three Phase ◽  
Active Detection ◽  
And Control ◽  
Control Topology

This paper presents a discharge inspection method based on new active inverter feedback discharge after comparison with the check discharge from pure resistance of power station batteries. A new active inverter system has been developed with SPWM pulse width modulation technology, which is based on DC/DC circuitry, along with a three-phase full bridge inverter and control topology circuits. In addition, the principle for selecting the parameters of RCL elements of the system has been analyzed. This paper also presents a detection method combining active detection with passive detection for the islanding effect which exists in the grid-connected discharge system, according to the islanding effect of grid-connected discharge equipment, so as to stably discharge without interference on the grid.

Study on 2D Simulation Algorithm and Implementation for Loop Pile Tufted Carpet

2011 ◽  
Vol 179-180 ◽  
pp. 651-656 ◽  
Author(s):  
Guang Feng Chen ◽  
Qing Qing Li ◽  
Hao Chun Sun ◽  
Wei Bin Wang
Keyword(s):  
Block Size ◽  
Simulation Software ◽  
Color Appearance ◽  
Current Loop ◽  
Control Logic ◽  
2D Simulation ◽  
Level Information ◽  
Control Pattern ◽  
Frame Work ◽  
And Control

To preview of the final appearance of tufted carpet, this paper devises a solution to simulate the color appearance of tufted carpet. The simulation adopts color blocks to represent a single loop pile in carpet surface, through resizing color block size to simulate the extrusion between loop piles. The solution starts from traversing the control pattern to get the pile height level information. Base on the current and surrounded loop piles height level to infer the size and start point of color block for current loop pile. According to patterns’ information to generate the color appearance simulation for loop pile tufted carpet. Base on the proposed simulation, devise the frame work and control logic for simulation software, and developed the simulation software with C++. Simulation test is carried out, the result shows the method can effectively generate carpet color appearance simulation for tufted carpet comprising of multicolor yarns.

A Shape Memory Alloy Driven Crawling Robot Utilizing a Bistable Mechanism

2019 ◽  
Author(s):  
Lingda Meng ◽  
Rongjie Kang ◽  
Dongming Gan ◽  
Guimin Chen ◽  
Jian S. Dai
Keyword(s):  
Shape Memory ◽  
Friction Surface ◽  
Static Model ◽  
Light Weight ◽  
Switching System ◽  
Reciprocating Motion ◽  
Control Logic ◽  
Anisotropic Friction ◽  
Bistable Mechanism ◽  
And Control

Abstract Shape memory alloys (SMA) can generate displacement and force via phase change and have been widely used as actuators in robotics due to their light weight and ease of control. This paper proposes a SMA-driven crawling robot which activates antagonistic SMA springs alternately through a mechanical on-off logic switching system. By introducing a cam based bistable mechanism, elastic energy is stored and released to regulate the reciprocating motion of a slider in the robot. Meanwhile, the robot feet with anisotropic friction surface are employed to convert the reciprocating motion of the slider to unidirectional locomotion of the robot. The static model of the SMA and control logic of the robot are analyzed and validated through experiments.

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