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To test the stability and performance of an airplane, it's necessary to adjust its barycenter during the trial fight. To cope with this issue, a novel real-time adjustment system for the barycenter of airplane is proposed based on compactRIO (cRIO). With the unique construction of cRIO, the designed system has adopted the hardware-software co-design concept. The program-able hardware (FPGA within...
The development of complex and highly safety-critical avionics systems, such as fly-by-wire, is typicaUy linked with high efforts, risks and thus costs. Especially with regard to certification the testing activities during verification are playing a major role. This paper introduces the automatization complex of the testing artifact generation by use of Abstract State Machines (ASM), which allows...
In this paper, a customized software tool to manage remote access to test equipment is presented. The software tool is developed using LabWindows/CVI and runs on Ethernet over TCP protocol. Ethernet is used as the media for communication and control since a local-area-network (LAN) infrastructure is mostly available in a facility; and almost all commercial-off-the-shelf (COTS) equipment manufacturers...
In recent years, synthetic test instruments have become increasingly popular in the automatic test equipment (ATE) market. This type of instrument gives users the ability to create custom solutions to better meet their test requirements. FPGA (Field Programmable Gate Array) based solutions are the most common synthetic test instrument on the market today. FPGA based solutions can work well due to...
The vibration signal of bearing faults is often non-stationary and nonlinear. The signal-processing methods based on Hilbert-Huang transform can effectively extract the fault features. The fault diagnosis of machinery is a typical small sample problem. Support vector machine is a machine learning method that is suitable for small sample classification problem. It is effective to the fault diagnosis...
Being able to record and analyze data securely have a paramount importance to meet the needs of both military and civilian applications. Therefore, data acquisition systems are used to meet the needs of complex applications. A data acquisition system capable of data conversion, collection and transfer is described in this paper. This system is implemented on FPGA, because of high processing speed...
Electronics communications standards demand higher bandwidth and density every year. As serial data communication bit rates begin to exceed 10Gbps and approach 40Gbps and greater, current copper interface performance erodes quickly. The solution is to use an optical interface that reduces loss, space, and weight. Optical interfaces bring with them new terminology, concepts, and challenges that did...
The electronics test engineer is constantly challenged by a myriad of digital interfaces. Military, Space, Communications, and Automotive electronics all utilize both industry standard and custom digital interfaces. Many of these interfaces are supported with test instrumentation that is dedicated to a specific interface or alternatively, a cycle-based, general purpose digital I/O instrument may be...
High-performance communication interfaces in modern complex electronic systems bring new challenges for board-level manufacturing test. Various means of calibration and error-correction that are incorporated into high-speed protocols tend to hide manufacturing flaws thus making comprehensive testing be an extremely hard task. Links transmitting at gigabit rates are especially susceptible to so-called...
Self-driving vehicle systems promise significant benefits beyond the limited autonomy capabilities demonstrated by currently commercially available and technology demonstration cars. This paper proposes the use of automated testing to assess the performance of a self-driving vehicle system through simulation.
Today, driver assistance systems and autonomous vehicles are actively developed and verified in real-world test scenarios. These real-world tests are neither cheap nor sufficient to ensure a reasonably low enough risk of failure. In order to enable efficient and methodical system tests, we propose the use of Virtual Testbeds (VTBs) as a software environment in which "Digital Twins" of real...
It is important to allow the test engineer great flexibility when developing a test program. Highly skilled test engineers desire flexibility and different hardware platforms to test a Unit Under Test (UUT). In the past, the engineer was told to use specific test equipment and not provided with the option to program an instrument to their specific test and diagnostic plans. Being stuck in a rut on...
Maintenance for a fleet of aircraft can be viewed from a systems engineering perspective. Not only are the aircraft complex systems, the logistics of maintaining airworthy systems depend on resources such as technicians, parts, and support equipment. Support equipment which falls under the Test, Measurement, and Diagnostic Equipment (TMDE) category requires periodic calibration. The calibration process...
The aviation industry has many aircraft in use after more than twenty years of life with some aircraft achieving the fifty years of life milestone. The avionics aboard the older aircraft are based on circuitry elements with diminishing or no manufacturing sources. Entire families of integrated circuits are no longer available, such as the early Intel processors and peripherals, 54C series CMOS logic...
In determining the optimal allocation of spare parts and labor in a machine shop, in addition to the planned inspections, the random failures must be considered. The expected number of failures must be therefore assessed. At present, literature on the subject mostly discusses minimal repairs and failure replacement, giving only a little attention to partial repairs. These models ignored the time period...
Modeling and Simulation (M&S) has become an essential tool in the development, testing and verification of operational software in a complex multi-domain, multi-threaded heterogeneous system of systems environment. The complex systems of today encompass mix of hardware sub-systems (with varying degree of capabilities), software environments (comprising a plethora of development environments, operating...
Integrating analog-to-digital converters that utilize a phase-sensitive detector (PSADCs) are frequently used in high precision instrumentation and measurement systems. As any technical object, a PSADC is subject to faults. These faults must be detected promptly and accurately by built-in low complexity hardware. In the present work, this objective is achieved by the adoption of error-control codes...
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