scholarly journals COTS-Based Real-Time System Development: An Effective Application in Pump Motor Control

Computers ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 97
Author(s):  
George K. Adam ◽  
Nikos Petrellis ◽  
Panagiotis A. Kontaxis ◽  
Tilemachos Stylianos
Keyword(s):  
Control System ◽  
Control Systems ◽  
Real Time ◽  
Sufficient Evidence ◽  
Real Time Control ◽  
Embedded Control ◽  
Real Time System ◽  
Suction Pump ◽  
Embedded Control Systems ◽  
Time Control

The progress of embedded control systems in the last several years has made possible the realization of highly-effective controllers in many domains. It is essential for such systems to provide effective performance at an affordable cost. Furthermore, real-time embedded control systems must have low energy consumption, as well as be reliable and timely. This research investigates primarily the feasibility of implementing an embedded real-time control system, based on a low-cost, commercially off-the-shelf (COTS) microcontroller platform. It explores real-time issues, such as the reliability and timely response, of such a system implementation. This work presents the development and performance evaluation of a novel real-time control architecture, based upon a BeagleBoard microcontroller, and applied into the PWM (pulse width modulation) control of a three-phase induction motor in a suction pump. The approach followed makes minimal use of general-purpose hardware (BeagleBone Black microcontroller board) and open-source software components (including Linux Operating System with PREEMPT_RT real-time support) for building a reliable real-time control system. The applicability of the proposed control system architecture is validated and evaluated in a real case study in manufacturing. The results provide sufficient evidence of the efficiency and reliability of the proposed approach into the development of a real-time control system based upon COTS components.

scholarly journals Real Time Control Systems of a Fighter Aircraft

2020 ◽  
Author(s):  
Asha Garg ◽  
Uma H. R. ◽  
Usha G. ◽  
Amitabh Saraf
Keyword(s):  
Control System ◽  
Control Systems ◽  
Real Time ◽  
Flight Control ◽  
Real Time Control ◽  
Fighter Aircraft ◽  
Redundancy Management ◽  
Time Control ◽  
Environment Control ◽  
Architecture And Design

Most modern fighter aircraft are multi-role by design and rely heavily on a number of systems that are computer controlled in real time for achieving the most optimal performance. This paper presents three important real time control systems designed for the Indian Light Combat Aircraft. These are the flight control system, the anti-skid brake control system and the environment control system. Design objectives for these systems along with a description of their various hardware elements, software architecture and design concepts have been presented here. All the systems house extremely critical functions during different phases of flight, and so are designed for high degrees of reliability and extremely low failure probabilities. The concepts adopted for redundancy management, failure identification and failure handling are also presented.

The Control System for a Vibration Exciter

2013 ◽  
Vol 198 ◽  
pp. 600-605 ◽  
Author(s):  
Jarosław Konieczny ◽  
Marek Sibielak ◽  
Waldemar Rączka
Keyword(s):  
Control System ◽  
Real Time ◽  
Vibration Exciter ◽  
Parallel Operation ◽  
Control Loop ◽  
Hydraulic Actuator ◽  
Real Time Control ◽  
Multiple Control ◽  
Real Time System ◽  
Time Control

The paper presents the control system for an electro-hydraulic vibration exciter. A vibration exciter is used to carry out kinematic and forced excitations. Such excitations are needed during the static and dynamic examinations of suspension assemblies and their elements, such as damping springs. The most important elements of the exciter are: a hydraulic servo valve, a hydraulic actuator, a control system and a hydraulic supply station. An inductor works in a negative feedback loop. A set point generator and controller are parts of a real-time control system. The authors used a cRIO-9022 industrial computer from National Instruments analogue input and output modules. Apart from supporting I/O modules, the cRIO controller in a real-time system communicates with an FPGA circuit that forms a control loop. The use of an FPGA (Field Programmable Gate Array) allowed for implementing a hardware control loop through a vibration exciter, as well as other control loops used in the research (such as controlling an active executive element). The use of such a system architecture enabled the parallel operation of multiple control threads. The selected structure also allows for flexible selection of the measuring channels, which are essential for system monitoring and data acquisition.

Java-Based Tools for Development and Diagnosis of Real-Time Control Systems

1998 ◽  
Author(s):  
Will Shackleford ◽  
Fredrick M. Proctor
Keyword(s):  
Control System ◽  
Control Systems ◽  
Real Time ◽  
Reference Model ◽  
Real Time Control ◽  
Building Control ◽  
The Real ◽  
Time Control ◽  
Control Modules ◽  
Work Done

Abstract The National Institute of Standards and Technology (NIST) has been using the Real-time Control System (RCS) Reference Model Architecture for building control systems based on a hierarchy of cyclically executing control modules. This paper describes the work done to build Java tools that allow developers to lay out their hierarchy according to RCS tenets and view or change the inputs and outputs of each module at run-time.

scholarly journals Hydraulic optimisation of multiple flow control locations for the design of local real time control systems

2020 ◽  
pp. 1-10
Author(s):  
M. Eulogi ◽  
S. Ostojin ◽  
P. Skipworth ◽  
J. D. Shucksmith ◽  
A. Schellart
Keyword(s):  
Flow Control ◽  
Control Systems ◽  
Real Time ◽  
Real Time Control ◽  
Time Control

A New Flexible Rapid Thermal Processing System

1995 ◽  
Vol 389 ◽  
Author(s):  
K. C. Saraswat ◽  
Y. Chen ◽  
L. Degertekin ◽  
B. T. Khuri-Yakub
Keyword(s):  
Control System ◽  
Real Time ◽  
Processing System ◽  
Process Conditions ◽  
Temperature Uniformity ◽  
Real Time Control ◽  
Wafer Temperature ◽  
Time Control ◽  
Wide Range ◽  
Optical Flux

ABSTRACTA highly flexible Rapid Thermal Multiprocessing (RTM) reactor is described. This flexibility is the result of several new innovations: a lamp system, an acoustic thermometer and a real-time control system. The new lamp has been optimally designed through the use of a “virtual reactor” methodology to obtain the best possible wafer temperature uniformity. It consists of multiple concentric rings composed of light bulbs with horizontal filaments. Each ring is independently and dynamically controlled providing better control over the spatial and temporal optical flux profile resulting in excellent temperature uniformity over a wide range of process conditions. An acoustic thermometer non-invasively allows complete wafer temperature tomography under all process conditions - a critically important measurement never obtained before. For real-time equipment and process control a model based multivariable control system has been developed. Extensive integration of computers and related technology for specification, communication, execution, monitoring, control, and diagnosis demonstrates the programmability of the RTM.

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