Design and Implementation of the Embedded Web Control System Based on ARM and Linux

2011 ◽  
Vol 130-134 ◽  
pp. 2961-2964
Author(s):  
Yun Liang Wang ◽  
Bo Wei Chen
Keyword(s):  
Remote Control ◽  
Embedded System ◽  
Control Method ◽  
Low Cost ◽  
Rapid Development ◽  
Remote Access ◽  
Control Technique ◽  
Effective Control ◽  
Remote Clients ◽  
Web Control

With the rapid development of networks and communications technology, the modern remote control technique has widely been used in many fields. By the Web technology, the local equipments can be connected with outside and enable monitoring the equipments in remote clients' space. At present many products adopt Embedded Chip to which an operating system is ported as a Web Server. This product has several advantages such as low power consumption, low cost, reduced size and better performance. This paper introduces a solution for embedded system access to Internet, through which we can remote access, monitor, and maintain conveniently. The solution which is based on Web and embedded technology adopts the way of human computer interface interaction to realize remote control to the equipment. The realization of this method for users provides a convenient, flexible and effective control method.

scholarly journals Nonlinear Control Design of a Half-Car Model Using Feedback Linearization and an LQR Controller

2020 ◽  
Vol 10 (9) ◽  
pp. 3075
Author(s):  
Muhammad Aseer Khan ◽  
Muhammad Abid ◽  
Nisar Ahmed ◽  
Abdul Wadood ◽  
Herie Park
Keyword(s):  
Feedback Linearization ◽  
Control Method ◽  
Control Technique ◽  
Effective Control ◽  
Ride Quality ◽  
Linear Quadratic ◽  
Suspension Systems ◽  
Car Model ◽  
Road Disturbance ◽  
Lqr Controller

Effective control of ride quality and handling performance are challenges for active vehicle suspension systems, particularly for off-road applications. The nonlinearities tend to degrade the performance of active suspension systems; these introduce harshness to the ride quality and reduce off-road mobility. Typical control strategies rely on linear models of the suspension dynamics. While these models are convenient, nominally accurate, and controllable due to the abundance of linear control techniques, they neglect the nonlinearities present in real suspension systems. The techniques already implemented and methods used to cope with problem of Half-Car model were studied. Every method and technique had some drawbacks in terms of complexity, cost-effectiveness, and ease of real time implementation. In this paper, an improved control method for Half-Car model was proposed. First, input/output feedback linearization was performed to convert the nonlinear system of Half-Car model into an equivalent linear system. This was followed by a Linear Quadratic Regulator (LQR) controller. This controller had minimized the effects of road disturbances by designing a gain matrix with optimal robustness properties. The proposed control technique was applied in the presence of the deterministic road disturbance. The results were verified using the Matlab/Simulink toolbox.

Research on Industrial Control Network Webstation Design

2014 ◽  
Vol 599-601 ◽  
pp. 1868-1870
Author(s):  
Wen Jin Xu
Keyword(s):  
Remote Control ◽  
Rapid Development ◽  
Remote Access ◽  
Control Network ◽  
Industrial Site ◽  
Network Resources ◽  
Industrial Control ◽  
Industrial Automation ◽  
Remote Sites

With the rapid development of industrial automation and increasing levels of Internet, remote access for industrial field is more and more to show its importance. However, how to develop a security in the existing network resources, reliable remote sites for industrial scene have many problems to be solved. In this paper, the example of the use of an industrial site is built for an Internet-based remote control network, the overall framework is highlighted, and the databases and websites are discussed in detail. So the conclusion of how to build complex industrial website is drawn.

A New strategy for on- line Droop adjustment for Microgrid connected DGs

2018 ◽  
Vol 9 (1) ◽  
pp. 139
Author(s):  
Sathyaprabakaran B ◽  
Subrata Paul ◽  
Debashis Chatterjee
Keyword(s):  
Control Method ◽  
Load Capacity ◽  
Operating Conditions ◽  
Control Mode ◽  
Control Technique ◽  
Effective Control ◽  
Droop Control ◽  
Capacitor Voltage ◽  
Grid Side ◽  
Filter Capacitor

This paper proposes a simple and effective control technique for interconnection of DG resources to the power grid via interfacing converters based on Phase locked loop (PLL) and Droop control. The behaviour of a Microgrid (MG) system during the transition from islanded mode to grid-connected mode of operation has been studied. A dynamic phase shifted PLL technique is locally designed for generating phase reference of each inverter. The phase angle between filter capacitor voltage vector and d-axis is dynamically adjusted with the change in q-axis inverter current to generate the phase reference of each inverter. During fluctuations in load capacity, the grid-connected system must be able to supply balanced power from the utility grid side and micro-grid side. Therefore, droop control is implemented to maintain a balanced power sharing. The inverter operates in voltage control mode in order to control the filter capacitor voltage. An adjusted droop control method for equivalent load sharing of parallel connected Inverters, without any communication between individual inverters, has been presented. The control loops are tested with aid of MATLAB Simulink tool during several operating conditions.

Application and Research of Embedded Web Server on S3C4510B

2013 ◽  
Vol 462-463 ◽  
pp. 935-939
Author(s):  
Kan Hu ◽  
Yuan Lin Lei
Keyword(s):  
Embedded System ◽  
Computer Technology ◽  
High Efficiency ◽  
Low Cost ◽  
Rapid Development ◽  
Web Server ◽  
Embedded Web Server ◽  
Hardware System ◽  
Embedded Web ◽  
The Embedded System

With the rapid development of computer technology, embedded system is more and more widely used. The embedded hardware system was designed by taking Samsung ARM7TDMI CPU as the core. And a small uClinux system was embedded into this hardware system. Various kinds of applications in uClinux system can be developed. This thesis introduced one of those applications, which is embedded web server and its protocol-HTTP. In this thesis, the embedded system based on ARM had been developed. Our embedded system has the characters of low cost and high efficiency. It is at large applicated on business forwardly.

The Design and Research of Active Clamp Forward Converter Based on IR1150

2014 ◽  
Vol 496-500 ◽  
pp. 1281-1284
Author(s):  
Yu Fang ◽  
Li Tan
Keyword(s):  
Power Supply ◽  
High Frequency ◽  
High Efficiency ◽  
Control Method ◽  
Low Cost ◽  
Control Technique ◽  
Switching Power Supply ◽  
Forward Converter ◽  
Switching Power ◽  
Active Clamp

Nowadays, the development of Power Electronics is very quickly. High frequency switching power supply has been widely used in many fields because of its advantages, such as high efficiency, low volume and low cost etc. this paper focuses on the research of DC-DC transform technology in switching power supply. In the foundation of the traditional forward converter, an active clamp forward converter based on one-cycle control is designed. The control IC is IR1150 based on one cycle control technique. The results show that the converter can effectively eliminate the interference of power ripple and switch error. The control method is simple and reliable. The peripheral circuit is easy to realize.

Two-degree-of-freedom Controller Design for Uncertain Processes Using Input/output Linearization Control Technique

2011 ◽  
Vol 11 (1) ◽  
pp. 16 ◽  
Author(s):  
Pisit Sukkarnkha ◽  
Chanin Panjapornpon
Keyword(s):  
Disturbance Rejection ◽  
Control Structure ◽  
Control Method ◽  
Random Noise ◽  
Degree Of Freedom ◽  
Control Technique ◽  
Input Output ◽  
Tracking Controller ◽  
Two Degree Of Freedom ◽  
Input Output Linearization

In this work, a new control method for uncertain processes is developed based on two-degree-of-freedom control structure. The setpoint tracking controller designed by input/output linearization technique is used to regulate the disturbance-free output and the disturbance rejection controller designed is designed by high-gain technique. The advantage of two-degree-of-freedom control structure is that setpoint tracking and load disturbance rejection controllers can be designed separately. Open-loop observer is applied to provide disturbance-free response for setpoint tracking controller. The process/disturbance-free model mismatches are fed to the disturbance rejection controller for reducing effect of disturbance. To evaluate the control performance, the proposed control method is applied through the example of a continuous stirred tank reactor with unmeasured input disturbances and random noise kinetic parametric uncertainties. The simulation results show that both types of disturbances can be effectively compensated by the proposed control method.

scholarly journals Low-Cost Embedded System Using Convolutional Neural Networks-Based Spatiotemporal Feature Map for Real-Time Human Action Recognition

2021 ◽  
Vol 11 (11) ◽  
pp. 4940
Author(s):  
Jinsoo Kim ◽  
Jeongho Cho
Keyword(s):  
Embedded System ◽  
Real Time ◽  
Action Recognition ◽  
Processing Speed ◽  
Recognition Accuracy ◽  
Low Cost ◽  
Human Action Recognition ◽  
Human Action ◽  
Video Data ◽  
Feature Maps

The field of research related to video data has difficulty in extracting not only spatial but also temporal features and human action recognition (HAR) is a representative field of research that applies convolutional neural network (CNN) to video data. The performance for action recognition has improved, but owing to the complexity of the model, some still limitations to operation in real-time persist. Therefore, a lightweight CNN-based single-stream HAR model that can operate in real-time is proposed. The proposed model extracts spatial feature maps by applying CNN to the images that develop the video and uses the frame change rate of sequential images as time information. Spatial feature maps are weighted-averaged by frame change, transformed into spatiotemporal features, and input into multilayer perceptrons, which have a relatively lower complexity than other HAR models; thus, our method has high utility in a single embedded system connected to CCTV. The results of evaluating action recognition accuracy and data processing speed through challenging action recognition benchmark UCF-101 showed higher action recognition accuracy than the HAR model using long short-term memory with a small amount of video frames and confirmed the real-time operational possibility through fast data processing speed. In addition, the performance of the proposed weighted mean-based HAR model was verified by testing it in Jetson NANO to confirm the possibility of using it in low-cost GPU-based embedded systems.

scholarly journals Recurrent Neural Network for Human Activity Recognition in Embedded Systems Using PPG and Accelerometer Data

Electronics ◽  
2021 ◽  
Vol 10 (14) ◽  
pp. 1715
Author(s):  
Michele Alessandrini ◽  
Giorgio Biagetti ◽  
Paolo Crippa ◽  
Laura Falaschetti ◽  
Claudio Turchetti
Keyword(s):  
Neural Network ◽  
Embedded System ◽  
Activity Recognition ◽  
Human Activity ◽  
Recurrent Neural Network ◽  
Low Cost ◽  
Low Complexity ◽  
Human Activity Recognition ◽  
Motion Artifacts ◽  
Accelerometer Data

Photoplethysmography (PPG) is a common and practical technique to detect human activity and other physiological parameters and is commonly implemented in wearable devices. However, the PPG signal is often severely corrupted by motion artifacts. The aim of this paper is to address the human activity recognition (HAR) task directly on the device, implementing a recurrent neural network (RNN) in a low cost, low power microcontroller, ensuring the required performance in terms of accuracy and low complexity. To reach this goal, (i) we first develop an RNN, which integrates PPG and tri-axial accelerometer data, where these data can be used to compensate motion artifacts in PPG in order to accurately detect human activity; (ii) then, we port the RNN to an embedded device, Cloud-JAM L4, based on an STM32 microcontroller, optimizing it to maintain an accuracy of over 95% while requiring modest computational power and memory resources. The experimental results show that such a system can be effectively implemented on a constrained-resource system, allowing the design of a fully autonomous wearable embedded system for human activity recognition and logging.

scholarly journals A Multi-Loop Vehicle-Counting Method under Gray Mode and RGB Mode

2021 ◽  
Vol 11 (15) ◽  
pp. 6831
Author(s):  
Yue Chen ◽  
Jian Lu
Keyword(s):  
Intelligent Transportation Systems ◽  
High Efficiency ◽  
Road Traffic ◽  
Low Cost ◽  
Rapid Development ◽  
Intelligent Transportation ◽  
Transportation Systems ◽  
Counting Method ◽  
Moving Vehicle ◽  
Available Information

With the rapid development of road traffic, real-time vehicle counting is very important in the construction of intelligent transportation systems (ITSs). Compared with traditional technologies, the video-based method for vehicle counting shows great importance and huge advantages in its low cost, high efficiency, and flexibility. However, many methods find difficulty in balancing the accuracy and complexity of the algorithm. For example, compared with traditional and simple methods, deep learning methods may achieve higher precision, but they also greatly increase the complexity of the algorithm. In addition to that, most of the methods only work under one mode of color, which is a waste of available information. Considering the above, a multi-loop vehicle-counting method under gray mode and RGB mode was proposed in this paper. Under gray and RGB modes, the moving vehicle can be detected more completely; with the help of multiple loops, vehicle counting could better deal with different influencing factors, such as driving behavior, traffic environment, shooting angle, etc. The experimental results show that the proposed method is able to count vehicles with more than 98.5% accuracy while dealing with different road scenes.

scholarly journals Motor shifting and torque distribution control of a multi-motor driving system in electric construction vehicles

2021 ◽  
Vol 13 (6) ◽  
pp. 168781402110284
Author(s):  
Weikang Kong ◽  
Jixin Wang ◽  
Dewen Kong ◽  
Yuanying Cong ◽  
Shuangshi Feng
Keyword(s):  
Power Systems ◽  
Control Method ◽  
Simulation Analysis ◽  
Rapid Development ◽  
Transmission Efficiency ◽  
Torque Distribution ◽  
Driving System ◽  
Construction Machinery ◽  
Improve Energy Efficiency ◽  
Parameter Matching

With the rapid development of the world economic construction and the shortage of energy, it has become a hot research issue to realize the electrification of the vehicle driving system and improve energy efficiency. Most of the electric construction machinery power systems are characterized by low speed and high load. The coordinated driving of multiple motors can increase the output torque and improve the transmission efficiency of the machine on the basis of a compact layout. A novel configuration of electric construction vehicles based on multi-motor and single-speed and its driving torque distribution control method is presented in this paper. The detailed mathematical model is established and the simulation analysis is carried out based on it. The results show that the proposed multi-motor driving system with the control strategy can improve the overall efficiency in the condition of ensuring the driving force when the parameter matching and motors choosing reasonably.

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