scholarly journals Performance estimation for embedded systems with data and control dependencies

2000 ◽  
Author(s):  
Paul Pop ◽  
Petru Els ◽  
Zebo Peng
Keyword(s):  
Embedded Systems ◽  
Performance Estimation ◽  
And Control

scholarly journals Experimental and Analytical Study of the Cold Flow Inside a Ramjet Test Engine

2020 ◽  
pp. 25-37
Author(s):  
Leonardo César Freitas ◽  
Olexiy Shynkarenko
Keyword(s):  
Analytical Study ◽  
Control Valve ◽  
Performance Estimation ◽  
Stable Operation ◽  
Flow Models ◽  
Cold Flow ◽  
Flow Parameters ◽  
Test Engine ◽  
Estimation And Control ◽  
And Control

The work is focused on the performance estimation and control of a cold flow inside a ramjet test engine, which initially operates without combustion, preparing the flow for the main propulsive phase. To achieve this objective, a “connected pipe” test bench was assembled. Flow management was performed using the control valve that allows regulating pressure and air mass flow rate in the engine according to its flight conditions through sensors installed at relevant positions. The proportional, integral and derivative (PID) parameters for the flow control algorithm were studied in order to guarantee the stable operation of the engine and correspondence of the flow parameters to predicted ones by the analytical modeling. Experimental results were validated by the numerical and analytical compressible flow models.

scholarly journals Implementing Dynamically Evolvable Communication with Embedded Systems through WEB Services

2016 ◽  
Vol 6 (1) ◽  
pp. 381
Author(s):  
Sasi Bhanu Jammalamadaka ◽  
Vinaya Babu A ◽  
Trimurthy A
Keyword(s):  
Embedded Systems ◽  
Web Services ◽  
Embedded System ◽  
Elementary Level ◽  
Online Testing ◽  
Critical System ◽  
Level Of Details ◽  
Architectural Models ◽  
The Embedded System ◽  
And Control

<p>Embedded systems that monitor and control safety and mission critical system are communicated with by a HOST located at a remote location through Internet. Such kind of embedded systems are developed to be dynamically evolvable with respect to syntax, semantics, online testing and communication subsystems. All these systems are to be dynamically evolvable and the components needed for evolution are also to be added into the embedded system. Architectural  models describe  various components using which dynamically evolvable sub-systems are realised through implementation by using specific and related technologies. Implementation system describe the platform, code units and the interlacing of various processes/tasks to the elementary level of details. WEB services place an excellent platform for implementing dynamically evolvable  systems due to the use of open standards.</p><p> </p><p>This paper presents an implementation system that is related to dynamically evolvable communication and other sub-systems using web services technologies.</p>

scholarly journals Networking Heterogeneous Microcontroller based Systems through Universal Serial Bus

2015 ◽  
Vol 5 (5) ◽  
pp. 992
Author(s):  
Sastry Kodanda Rama Jammalamadaka ◽  
Valluru Sai Kumar Reddy ◽  
Smt J Sasi Bhanu
Keyword(s):  
Embedded Systems ◽  
Embedded System ◽  
Error Detection ◽  
Nuclear Reactor ◽  
Universal Serial Bus ◽  
Distributed Embedded Systems ◽  
Communication Architecture ◽  
The Individual ◽  
And Control ◽  
Synchronisation Error

Networking heterogeneous embedded systems is a challenge. Every distributed embedded systems requires that the network is designed specifically considering the heterogeneity that exits among different Microcontroller based systems that are used in developing a distributed embedded system. Communication architecture, which considers the addressing of the individual systems, arbitration, synchronisation, error detection and control etc., needs to be designed considering a specific application. The issue of configuring the slaves has to be addressed. It is also important that the messages, flow of the messages across the individual ES systems must be designed. Every distributed embedded system is different and needs to be dealt with separately. This paper presents an approach that addresses various issues related to networking distributed embedded systems through use of universal serial bus communication protocol (USB). The approach has been applied to design a distributed embedded that monitors and controls temperatures within a Nuclear reactor system.

scholarly journals Hardware Assisted Security Platform

2021 ◽  
Author(s):  
Mir Ahsan
Keyword(s):  
Embedded Systems ◽  
Embedded System ◽  
Design Solution ◽  
Security Design ◽  
Security Threat ◽  
Threat Analysis ◽  
Power Battery ◽  
Processing Power ◽  
Man In The Middle ◽  
And Control

Embedded systems are often used to monitor and control various dynamic and complex applications. However, with greater accessibility and added features on many embedded systems, more and more systems are being subject to sophisticated and new types of attacks. As a result, the security aspect of embedded systems has become critical design step. TrustZone has become a popular choice for security design solution in systems where resources such as processing power, battery are limited. In TrustZone, two virtual processors called "secure world" and “normal world” run on the same core in a time sliced manner. These worlds have partitioned hardware and software resources, with different modes of operation, isolated memory regions and interrupts. In this paper, the hardware and software architecture of TrustZone is analyzed from the perspective of embedded system security design. Then a mobile-ticketing system based on TrustZone is presented which incorporates standard cryptographic engineering design practices to demonstrate the feasibility and effectiveness of such system. The ticketing system is then simulated and security threat analysis is performed in terms known vulnerabilities such as Buffer Overflow, Static and dynamic code/data tampering, Return Oriented Programming (ROP) exploits, and Man-in-the middle attacks. After evaluating the analysis results with various open source vulnerability analysis tools, it is conclusive that the system design is an effective solution particularly for embedded systems.

SystemC Platform Modeling for Behavioral Simulation and Performance Estimation of Embedded Systems

2010 ◽  
pp. 219-243 ◽  
Author(s):  
Hector Posadas ◽  
Juan Castillo ◽  
David Quijano ◽  
Victor Fernandez ◽  
Eugenio Villar ◽  
...  
Keyword(s):  
Embedded Systems ◽  
Design Space Exploration ◽  
Performance Metrics ◽  
System Modeling ◽  
Performance Estimation ◽  
Behavioral Simulation ◽  
Close Interaction ◽  
Accurate Performance ◽  
And Performance ◽  
On Chip

Currently, embedded systems make use of large, multiprocessing systems on chip integrating complex application software running on the different processors in close interaction with the application-specific hardware. These systems demand new modeling, simulation, and performance estimation tools and methodologies for system architecture evaluation and design exploration. Recently approved as IEEE 1666 standard, SystemC has proven to be a powerful language for system modeling and simulation. In this chapter, SCoPE, a SystemC framework for platform modeling, SW source-code behavioral simulation and performance estimation of embedded systems is presented. Using SCoPE, the application SW running on the different processors of the platform can be simulated efficiently in close interaction with the rest of the platform components. In this way, fast and sufficiently accurate performance metrics are obtained for design-space exploration.

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