An Overview of the SUSI Control System

1994 ◽  
Vol 158 ◽  
pp. 181-183
Author(s):  
R. A. Minard ◽  
A. J. Booth ◽  
W. J. Tango ◽  
T. Ten Brummelaar ◽  
H. Bennis ◽  
...  
Keyword(s):  
Operating System ◽  
Control System ◽  
Real Time ◽  
Network Protocols ◽  
Time System ◽  
Real Time System ◽  
Real Time Operating System ◽  
Multiple Processors ◽  
Synchronous Operation

The SUSI control system is a distributed real-time system currently consisting of 17 processors. A custom real-time operating system and network protocols ensure synchronous operation of servo loops across multiple processors.

A Study on the Design Method of the Real-Time System Software Based on RTOS

2014 ◽  
Vol 513-517 ◽  
pp. 2487-2491
Author(s):  
Dong Zhao ◽  
Shang Wei Jiang ◽  
Hong Wei Zhao ◽  
Xin Tong Yu
Keyword(s):  
Operating System ◽  
Real Time ◽  
Design Method ◽  
Control Flow ◽  
Functional Requirements ◽  
Time System ◽  
Real Time System ◽  
Real Time Operating System ◽  
The Real ◽  
Structured Analysis

This paper combines the characteristics of real-time embedded systems and the real-time operating system to propose a software engineering method and process which bases on the function structured analysis and task structured design. First in the process of structured analysis based on the Hatley-Pirbhai method, extracting and sorting out the data flow and control flow according to the functional requirements of the system, analyzing and processing the functions of the system, the dependency among the functions and the timing sequence, and then realizing the design of the specific functions of the system, next achieving the structural design through the improving method, it also simplifies the system design processes. At this time, just need to analyze and divide the processing which is obtained from the structural analysis to get the specific task, design the interfaces among the tasks and also every task to get the new design method of the embedded real-time operating system, which also solves hard issue of the traditional method which is the weak extracting and developing iteration in the embedded real-time system.

scholarly journals An Introduction to RTOS

2012 ◽  
pp. 285-289
Author(s):  
Sanjay Singh ◽  
Nishant Tripathi ◽  
Anil Kumar Chaudhary ◽  
Mahesh Kumar Singh
Keyword(s):  
Operating System ◽  
Real Time ◽  
Level Of Service ◽  
Real Time Systems ◽  
Time System ◽  
Real Time System ◽  
Real Time Operating System ◽  
System A ◽  
External Stimuli ◽  
Time Systems

RTOS (real time operating system) can be defined as “The ability of the operating system to provide a required level of service in bounded response time.” A real time system responds in a (timely) predictable way to unpredictable external stimuli arrivals. To build a predictable system, all its components (hardware & software) should enable this requirement to be fulfilled. Traffic on a bus for example should take place in a way allowing all events to be managed within the prescribe time limit. However it should not be forgotten that a good RTOS is only is building block. Using it in a wrongly designed system may lead to a malfunctioning of the RT system. A good RTOS can be defined as one that has a bounded (predictable) behavior under all system load scenarios (simultaneous interrupts and thread execution). In RT system, each individual deadline should be met. Real-time systems are designed to control and monitor their environment. Most of these systems are using sensors to collect environment state and use actuators to change something.

Software Design of Aircraft Electrical Load Management Center Based on μC/OS-II

2011 ◽  
Vol 268-270 ◽  
pp. 552-556
Author(s):  
Jian Jun Wu ◽  
Wei Wan ◽  
Da Hai Zhao
Keyword(s):  
Operating System ◽  
Real Time ◽  
Software Design ◽  
Load Management ◽  
Electrical Load ◽  
Time System ◽  
Real Time System ◽  
Single Task ◽  
Real Time Operating System ◽  
Priority Allocation

This paper introduces that embedded real time operating system μC/OS-II is applied in software design of aircraft electrical load management center. Firstly, the μC/OS-II and its running on ARM are briefly presented. Then the method of two system running modes is given in details. And the tasks assignment, priority allocation and communication between tasks under both two modes are also provided. Results show that multitask schedule managements of real-time system has solved the problem of poor real-time in a single task system. And the reliability of the system has been greatly improved.

scholarly journals A Hybrid Multiprocessor Scheduler for Soft Real-Time System with Processor Affinity Concept

2021 ◽  
Vol 2089 (1) ◽  
pp. 012022
Author(s):  
Ms Jayna Donga ◽  
M.S. Holia
Keyword(s):  
Operating System ◽  
Real Time ◽  
Migration Policy ◽  
Time System ◽  
Real Time System ◽  
Real Time Operating System ◽  
Flexible Approach ◽  
Time Extension ◽  
Overall Performance ◽  
Traditional Approaches

Abstract Now a days numerous real-time OS like QNX, VxWorks, LynxOS and real-time extension of Linux practicing the processor affinity concept to schedule the real-time tasks and it offers more flexible approach instead of traditional approaches defined in the literature. Limiting the migration may reduce the context switch overhead and improve the cache performance but it largely influence on other parameters which are most important for the any real-time operating system. It degrades overall performance by decreasing the schedulability of tasks, increase the deadline miss ratio. This paper presents the problem in existing processor affinity based approach which confines the schedulability of the tasks and designed a novel processor affinity based algorithm to enhance the schedulability of the tasks and decreases the average deadline miss ratio by providing the flexible migration policy with the priority reassignment mechanism.

scholarly journals Research on Real-Time System and Related Graph Task Model

2021 ◽  
Vol 2066 (1) ◽  
pp. 012054
Author(s):  
Juan Xiao ◽  
Song Wang ◽  
Sheng Duan ◽  
Shanglin Li
Keyword(s):  
Operating System ◽  
Real Time ◽  
Directed Graph ◽  
Scheduling Algorithm ◽  
Time Constraint ◽  
Time System ◽  
Real Time System ◽  
Real Time Operating System ◽  
Task Model ◽  
Time Accuracy

Abstract Generally speaking, real-time system is considered to be able to influence the environment by receiving and processing data, and returning calculation results rapid enough, so as to control the environment. In computer science, real-time system describes the software and hardware system affected by time constraints, and its correctness relies on the logical correctness of the function and the time when the result is generated. According to the main characteristics of real-time operating system, such as time constraint, predictability and reliability, it puts forward higher requirements for the time accuracy and reliability of real-time operating system. This paper first introduces the real-time system from its main characteristics, related concepts and scheduling algorithm. Then five classical graph based task models of real-time system are introduced. Finally, this paper introduces the directed graph realtime task model from two aspects of definition and semantics. As an extension of realtime system task model, directed graph real-time task model is considered to be able to provide real-time systems with stronger expressive power and support the formal study of time constraint problems.

Research on Unmanned Helicopter Communication System Based on μC/OS-II Operating System

2013 ◽  
Vol 456 ◽  
pp. 607-610 ◽  
Author(s):  
Meng Lin He ◽  
Ning Luo ◽  
Andrew Cudzo Amenuvor
Keyword(s):  
Operating System ◽  
Control System ◽  
Real Time ◽  
Communication System ◽  
Unmanned Helicopter ◽  
Monitoring And Control ◽  
Real Time System ◽  
Monitoring And Control System ◽  
And Control ◽  
Ground Monitoring

Recent years, Unmanned Aerial Vehicle (UAV) has gained great attention and importance both in civil and military applications all over the world. Ground Monitoring and Control System (GMCS) is an important part of the entire unmanned helicopter system. As UAV develops rapidly, the functions and tasks are becoming increasingly complex, and the ground control station needs to collect more data. In addition, establishing a real-time and reliable communication system has become an important part of the control system of UAVs. The μC/OS-II operating system has the characteristics of modular application which can be used for multiple task operations, and can satisfy the requirement of real time system very well. And the system was successfully applicable to practical UAV fighter and the setting up of The Ground Monitoring Station.

The Research of Electronical Control System Based on OSEK/VDX

2009 ◽  
Vol 16-19 ◽  
pp. 100-104
Author(s):  
Yue Pan ◽  
Jian Chang Liu
Keyword(s):  
Operating System ◽  
Control System ◽  
Open Source ◽  
Real Time ◽  
Embedded Operating System ◽  
Application Development ◽  
Operation System ◽  
Real Time Operating System

The standard of OSEK/VDX which used in the embedded operating system of car was analysized, and based on this, to select the open-source real-time operating system μC/OS-II as a operation system that will be loaded in the control chip. After that the kernel structure of the μC/OS-II was analysized, and modified the kernel of the system in accordance with OSEK/VDX standards, then translated the μC/OS-II system to the LPC2131 development board for the follow-up application development laid the foundation.

Control System Design for High Payload Industrial Robot via High Speed Communication Bus and Real-Time System

2011 ◽  
Vol 464 ◽  
pp. 272-278 ◽  
Author(s):  
Wei You ◽  
Min Xiu Kong ◽  
Li Ning Sun ◽  
Chan Chan Guo
Keyword(s):  
Control System ◽  
Real Time ◽  
High Speed ◽  
Industrial Robot ◽  
Engineering Application ◽  
Industrial Robots ◽  
Centralized Control ◽  
Time System ◽  
Real Time System ◽  
High Payload

In this paper, aiming at solving the problems of dynamic coupling effects and flexibility of joints and links, a kind of control system specialized for high payload industrial robots is proposed . After the comparisons between the control systems in all kinds of robots and numerical machines, industrial PC with TwinCAT real-time system is chosen as the motion control unit, EtherCAT is used for command transmitting. The whole control system has a decoupled and centralized control structure. The proposed control system is applied in control of a kind of high payload material handling robots with complex compound control algorithms. The final results shows that the control commands can be easily calculated and transmitted in one sample unit. The proposed control scheme is meaningful to real engineering application.

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