Transparent State Management for Optimistic Synchronization in the High Level Architecture

2005 ◽  
Author(s):  
A. Santoro ◽  
F. Quaglia
Keyword(s):  
High Level Architecture ◽  
State Management ◽  
High Level ◽  
Optimistic Synchronization ◽  
Transparent State

Research on HLA Optimistic Time Advance Mechanism Based on FQR

2010 ◽  
Vol 159 ◽  
pp. 56-61
Author(s):  
Xiang Ning Li ◽  
Jing Ma
Keyword(s):  
Simulation Model ◽  
Time Management ◽  
Distributed Simulation ◽  
Difficult Problem ◽  
High Level Architecture ◽  
Synchronization Mechanism ◽  
High Level ◽  
Correct Understanding ◽  
Optimistic Synchronization

With the widely application of High Level Architecture (HLA) standard that supports interoperability and reusability, correct understanding of time management and advance mechanism in HLA has been a concerning difficult problem in the field of distributed simulation. Aiming at the problem, the paper analyzed and compared difference between conservative time advance mechanism and optimistic time advance mechanism. The rollback manager was introduced to implement the optimistic time advance mechanism. The middleware was also applied to deal with the rollback process in simulation model. In order to make fully use of advantages of optimistic synchronization mechanism, Flash Queue Request (FQR) service that provided by HLA was used to arrive at an improved time advance algorithm.

A High Level Architecture-based Medical Simulation System

SIMULATION ◽  
1999 ◽  
Vol 73 (5) ◽  
pp. 281-287 ◽  
Author(s):  
Mikel D. Petty ◽  
Piotr S. Windyga
Keyword(s):  
Simulation System ◽  
Medical Simulation ◽  
High Level Architecture ◽  
High Level

Simulation and Implementation of HLA-Based Branch Predictor of Multi-Pipeline Processor

2012 ◽  
Vol 204-208 ◽  
pp. 4952-4957
Author(s):  
Ji Hua Ye ◽  
Qi Xie ◽  
Yao Hong Xiahou
Keyword(s):  
Simulation System ◽  
New Method ◽  
High Level Architecture ◽  
Hit Rate ◽  
Branch Predictor ◽  
The Right ◽  
High Level ◽  
Two Sides

Researched how the multi-pipeline processor accelerates the running of thread ,found that when the branch predictor facing the random branch instruction, the hit rate will become very low, so bring out a new method that using the free pipeline to accelerate the running of branch instruction. If the right prediction from branch predictor is less than 70% and there is a free pipeline, then using two pipelines to run the two sides of a branch instruction at the same time. In order to test the new method, the HLA (High Level architecture) architecture-based simulation system is established, the results show that the new method can really reduce the time when processing the random branch instructions.

scholarly journals An Environment for Indoor Testing and Diagnosis of Drones using Co-simulation

2019 ◽  
Author(s):  
Renato Ricardo Abreu ◽  
Thyago Oliveira ◽  
Leydson Silva ◽  
Tiago Nascimento ◽  
Alisson Brito
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Detection Rate ◽  
Failure Detection ◽  
Indoor Environments ◽  
Decision Tree Algorithm ◽  
High Level Architecture ◽  
Testing Environment ◽  
Testing Tool ◽  
High Level ◽  
Require Reliability

Operations with Unmanned Aerial Vehicles (UAVs) require reliability to execute missions. With the correct diagnostic, it is possible to predict vehicle failure during or before the flight. The objective of this work is to present a testing tool, which analyzes and evaluates drones during the flight in indoor environments. For this purpose, the framework Ptolemy II was extended for communication with real drones using the High-Level Architecture (HLA) for data exchanging and synchronization. The presented testing environment is extendable for other testing routines and is ready for integration with other simulation and analysis tools. In this paper, two failure detection experiments were performed, with a total of 20 flights for each one, which 80\% were used to train a decision tree algorithm, and the other 20% flights to test the algorithm in which one of the propellers had an anomaly. The failure rate or detection rate was 70\% for the first experiment and 90% for the second one.

A Simulation System of Anti-Ship Missile Path Planning Oriented Ship Formation

2012 ◽  
Vol 532-533 ◽  
pp. 645-649
Author(s):  
Gang Liu ◽  
Song Yang Lao ◽  
Lv Lin Hou ◽  
Can Yuan
Keyword(s):  
Path Planning ◽  
Time Management ◽  
Implementation Process ◽  
Simulation System ◽  
Distribution Area ◽  
High Level Architecture ◽  
Static Structure ◽  
Simulation Strategy ◽  
Tactical Decision ◽  
High Level

According to analysis of relationship among fire distribution, area division and path planning, the thought of trinity tactical decision of surface ships formation missile path planning (SFMPP) is put forward. Expandable open simulation architecture is designed and established based on high level architecture HLA. In order to describe simulation requirement, the static structure model and dynamic behavior model were designed based on UML. Based on HLA/RTI specification, federation’s FOM/SOM is designed and developed. The implementation process of simulation system is expatiates, including simulation strategy, time management, modeling and the federates’ implementation process. The realization of SFMPP simulation system provides a reference trial platform for tactical application argumentation and armament development.

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