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Hardware in the Loop (HiL) supports development processes in many types of applications. Power electronic systems with switching frequencies up to several kilo hertz constitute some of the most demanding applications for the quantization time of the HiL. The non-avoidable delay forces very short calculation periods which lead to high effort in hardware and software implementation. For PWM based controllers...
In many power electronic applications the request of short development time demands reliable simulation studies to prove the control concepts in early developments stages and avoid critical behavior in real application. Simulation studies are sufficient to prove the general behavior of a control code. However, the platform architecture of the target hardware influences control behavior and code stability...
Hardware in-the-loop simulation test has the advantage of live test, digital simulation test, which can build the lifelike test environment. This kind of test can carry through repeated test of multi-sample. The key technique of the hardware in-the-loop simulation test is real-time algorithmic and communication technology. In this paper, based on reflective memory network, the design for hardware...
Networks-on-Chip (NoCs) for real-time systems require solutions for a safe and predictable sharing of resources between transmissions with different quality-of service (QoS) requirements. In this work, we present a mechanism which allows to apply existing wormhole-switched and performance optimized NoCs in safety critical domains, without requiring complex hardware modifications. For this purpose,...
With the rapid development of computer technology, Software-Defined Radio has become more and more popular. We can now transfer the communication system from hardware to software, which makes it more flexible and helps us virtualize the communication system. In this paper, we creatively introduce a method to guarantee hard real-time in user-space on Linux. Unlike the usual methods, Our method(real...
Networks-on-Chip (NoCs) designed for real-time systems must efficiently deal with a broad diversity of traffic requirements. This requires providing latency guarantees for hard real-time transmissions with minimum impact on performance sensitive best-effort traffic. In this work, we present a novel mechanism which achieves this goal through a slack-based global and dynamic prioritization of data streams...
Traditional power grid is not resistant to severe weather conditions, especially in remote areas. For some areas with few people, such as islands, it is difficult and expensive to maintain their connectivity to the traditional power grid. Therefore, a self-sustainable microgrid is desired. However, given the limited local energy storage and energy generation, it is extremely challenging for a microgrid...
Current fusion devices usually implement distributed acquisition systems for the multiple diagnostics of their experiments. However, each diagnostic is composed by hundreds or even thousands of signals, including images from the vessel interior. These signals and images must be correctly timestamped, because all the information will be analyzed to identify plasma behavior using temporal correlations...
Networks-on-Chip (NoCs) for real-time systems require solutions for safe and predictable sharing of network resources between transmissions with different quality-of service requirementrs. In this work, we present a mechanism for a global and dynamic admission control in NoCs designed for realtime systems. It introduces an overlay network to synchronize transmissions using arbitration units called...
Networks-on-Chip (NoCs) for future real-time systems must provide service guarantees for applications with different levels of criticality. In this work, we propose an efficient mechanism for supporting mixed-criticality which combines the global, work-conserving scheduling for the end to end guarantees with the local arbitration in routers. We introduce a dynamic control layer with a central Resource...
Modern computer architectures, particularly multicore systems, include shared hardware resources such as caches and interconnects that introduce timing-interference channels. Unmanaged access to such resources can adversely affect the execution time of other tasks, and lead to unpredictable execution times and associated analysis pessimism that can entirely negate the benefits of a multicore processor...
This work presents a technique for testing real-time embedded systems using Hardware-in-the-Loop (HIL) simulation, exploiting High-Level Architecture (HLA) standard for interoperability and synchronization of heterogeneous architectures. The proposed testing approach uses the Ptolemy framework to verify in real-time models running in hardware against their respective reference models developed in...
Migration to multicore is inevitable. To harness the potential of this technology, embedded system designers need to have available operating systems (OSes) with built-in capabilities for multicore hardware. When designed to meet real-time requirements, multicore SMP (Symmetric Multiprocessing) OSes not only face the inherent problem of concurrent access to shared kernel resources, but still suffer...
Radar signal simulator play a key role in radar debugging, performance evaluation and equipment maintenance. The large bandwidth, high power transmitter is always a hot research area in radar signal. The radar signal simulator used as the signal source, can generate multi-channel arbitrary waveform by software programming which can meet the requirement of real-time signal output. With the development...
We analyze the performance of Linux-based EtherCAT synchronization technique, namely the distributed clock (DC). The IgH EtherCAT master module is an open source program for the desktop Linux PC. In order to use the EtherCAT master in Linux system environment, we change and compile a Real-time patched kernel. As a result, we become able to use Linux-based EtherCAT master with the EtherCAT slave hardwares...
The requirements, functionality, and consequently also the complexity of software used in the automotive industry has continuously been increasing over the last decades. To cope with this development, main car manufacturing companies and automotive suppliers established the AUTOSAR partnership back in 2003. Its main objective is to reduce development costs and to enhance cooperation between different...
Included in the Upgrade to NSTX at Princeton University's Plasma Physics Laboratory, is the development of a Digital Coil Protection System (DCPS). This real-time system is the primary protection for the machine coils and structure of the NSTX-U vessel. A requirement for a means to thoroughly test the DCPS birthed the Digital Coil Protection System Autotester (AT). From its inception in May of 2013,...
Ethernet is a low-cost communication solution offering high transmission speeds. Although its applications extend beyond computer networking, Ethernet is not suitable for real-time and safety-critical systems. To alleviate this, several real-time Ethernet-based communication protocols have been proposed, such as TTEthernet, which is the focus of this paper. TTEthernet is suitable for mixed-criticality...
Web-based multi-screen digital signage system is designed to show a multimedia content via multiple signage screens which are connected by a network. In this demonstration, a novel method to control multi-screen digital signage is proposed. The proposed method uses standard web technologies to display same contents and seamless moving each devices screen.
Due to the increasing bandwidth and timing requirements, next generation communication backbones in cars will most likely base on real-time Ethernet variants that satisfy the demands of the new automotive applications. The upcoming IEEE 802.1Qbv standard shows communication approaches based on coordinated time devision multiple access (TDMA) to be good candidates for providing communication with determinism...
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