scholarly journals Design and Implementation of NTU Wearable Exoskeleton as an Enhancement and Assistive Device

2006 ◽  
Vol 3 (3) ◽  
pp. 209-225 ◽  
Author(s):  
K. H. Low ◽  
X. Liu ◽  
H. Yu
Keyword(s):  
Real Time ◽  
Research Work ◽  
Assistive Device ◽  
Design And Implementation ◽  
Xpc Target ◽  
Gait Coordination ◽  
Zero Moment ◽  
Wearable Exoskeleton ◽  
Heavy Loads ◽  
And Control

This article presents a wearable lower extremity exoskeleton (LEE) developed to enhance the ability of a human’s walking while carrying heavy loads. The ultimate goal of the current research work is to design and control a power assist system that integrates a human’s intellect for feedback and sensory purposes. The exoskeleton system in this work consists of an inner exoskeleton and an outer exoskeleton. The inner exoskeleton measures the movements of the wearer and provides these measurements to the outer exoskeleton, which supports the whole exoskeleton system to walk following the wearer. A special footpad, which is designed and attached to the outer exoskeleton, can measure the zero moment point (ZMP) of the human as well as that of the exoskeleton in time. Using the measured human ZMP as the reference, the exoskeleton’s ZMP is controlled by trunk compensation so that the exoskeleton can walk stably. A simulation platform has first been developed to examine the gait coordination through inner and outer exoskeletons. A commercially available software, xPC Target, together with other toolboxes from MATLAB, has then been used to provide a real-time operating system for controlling the exoskeleton. Real-time locomotion control of the exoskeleton is implemented in the developed environment. Finally, some experiments on different objects showed that the stable walking can be achieved in the real environment.

A Multi-level Evidence-based Cyber Crime Prosecution Information System

2018 ◽  
Vol 7 (3.19) ◽  
pp. 39 ◽  
Author(s):  
Moses Adah Agana ◽  
Ruth Wario
Keyword(s):  
Real Time ◽  
Cyber Security ◽  
Research Work ◽  
Geographical Location ◽  
Cyber Crime ◽  
Law Enforcement Agencies ◽  
Crime Detection ◽  
Multi Level ◽  
And Control ◽  
Cyber Criminals

This research work was designed to utilize multi-level cyber crime detection and control system to provide enhanced real-time evidence to cyber crime investigators to aid them in prosecuting cyber criminals. The design was based on a robust system combining user-identity, device identity, geographical location and user activities to provide evidences to uniquely identify a cyber user and detect crimes committed. The system captures the user’s facial image and biometric finger print as mandatory login parameters in addition to username and password before granting access. The system was tested and implemented in a real time cyber security website www.ganamos.org.  The results showed that it is possible to divulge the identity of cyber users and associate their activities with the devices they use, the date, time and location of operation. These can provide real-time evidences to law enforcement agencies to track down and prosecute cyber criminals. 

scholarly journals Real Time Implementation of Third Generation CRONE Control Strategy for Air Pressure System

2020 ◽  
Vol 8 (6) ◽  
pp. 1107-1112
Keyword(s):  
Real Time ◽  
Control Strategy ◽  
Research Work ◽  
Air Pressure ◽  
Third Generation ◽  
Pressure System ◽  
Worst Case ◽  
Design And Implementation ◽  
Crone Control ◽  
Pi Controllers

The primary objectives of this research work are design and implementation of Third Generation CRONE controller for Air Pressure System (APS). The mathematical modeling is determined using worst case modeling technique for different operating regions. The design and implementation of CRONE control strategy through worst case modelling and examined in real time. The performances of Third Generation CRONE (TGC) controller is compared with ZN-PI controller and the results are tabulated in terms of time domain and error indices. It is validated that the TGC controller gives better performances than ZN-PI controllers.

The Design and Implementation of G-RBAC Model in Map Permission

2011 ◽  
Vol 268-270 ◽  
pp. 1457-1461
Author(s):  
Ji Qiu Deng ◽  
Xiao Qing Luo ◽  
Huang Ling Gu
Keyword(s):  
Access Control ◽  
Real Time ◽  
Spatial Data ◽  
Role Based Access Control ◽  
Design And Implementation ◽  
Model Based ◽  
Valid Method ◽  
Role Based ◽  
And Control

With the development of WebGIS, it plays a more and more important role in government and enterprises. The effective way to access and control spatial data, because of relating to the security and business secrets of government and enterprises, becomes an urgent concern for them. Now, RBAC (Role Based Access Control) can be a valid method to access and control uniform resource, but it is lack of flexibility and real-time ability to control spatial data in WebGIS. For that, this paper proposes G-RBAC model based on RBAC model to enhance the flexibility and real-time ability to access spatial data.

scholarly journals Real-time data assimilation and control on mechanical systems under uncertainties

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Paul-Baptiste Rubio ◽  
Ludovic Chamoin ◽  
François Louf
Keyword(s):  
Data Assimilation ◽  
Real Time ◽  
Feedback Loop ◽  
Model Updating ◽  
Research Work ◽  
Welding Process ◽  
Fusion Welding ◽  
Time Data ◽  
Application Systems ◽  
And Control

AbstractThis research work deals with the implementation of so-called Dynamic Data-Driven Application Systems (DDDAS) in structural mechanics activities. It aims at designing a real-time numerical feedback loop between a physical system of interest and its numerical simulator, so that (i) the simulation model is dynamically updated from sequential and in situ observations on the system; (ii) the system is appropriately driven and controlled in service using predictions given by the simulator. In order to build such a feedback loop and take various uncertainties into account, a suitable stochastic framework is considered for both data assimilation and control, with the propagation of these uncertainties from model updating up to command synthesis by using a specific and attractive sampling technique. Furthermore, reduced order modeling based on the Proper Generalized Decomposition (PGD) technique is used all along the process in order to reach the real-time constraint. This permits fast multi-query evaluations and predictions, by means of the parametrized physics-based model, in the online phase of the feedback loop. The control of a fusion welding process under various scenarios is considered to illustrate the proposed methodology and to assess the performance of the associated numerical architecture.

Development of a Novel Electro-Hydraulic Laboratory

2006 ◽  
Author(s):  
David G. Fenstermacher ◽  
K. Krishnamurthy ◽  
Robert G. Landers ◽  
Jigar D. Patel
Keyword(s):  
Real Time ◽  
Hydraulic Systems ◽  
Real Time Control ◽  
Time Data ◽  
University Of Missouri ◽  
Time Control ◽  
Industrial Grade ◽  
Xpc Target ◽  
Hydraulics Laboratory ◽  
And Control

This paper describes an Electro-Hydraulics Laboratory (EH Lab) at the University of Missouri - Rolla (UMR), which was recently established with a gift from Caterpillar Inc. The goal of this laboratory is to provide students the opportunity for hands-on experience with signal processing, dynamic modeling, and real-time control of industrial-grade electro-hydraulic systems. Unlike most comparable educational laboratories, nearly all of the components used in this laboratory were originally intended for industrial use, yielding a much more real-world experience for students. The laboratory utilizes the xPC Target software for rapid prototyping and execution of real-time data acquisition and control systems using Simulink. Several laboratories, as well as a course project, that utilize the EH Lab are presented.

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