The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This work presents the lessons learned and critical updates to the Research Oriented Underwater Glider for Hands-on Investigative Engineering (ROUGHIE). The open water testing experience with the original ROUGHIE provides key insight to design and operation of small scale autonomous underwater vehicles. This paper is organized to share necessary considerations that will be crucial for future vehicle...
Autonomous vehicles pose new challenges to their testing, which is required for safety certification. While Autonomous vehicles will use training sets as specification for machine learning algorithms, traditional validation depends on the system’s requirements and design.The presented approach uses training sets which are observations of traffic situations as system specification. It aims...
Many early stage lung cancer patients have resectable tumors, however, their cardiopulmonary function needs to be properly evaluated before they are deemed operative candidates. Such patients are typically asked to undergo standard pulmonary function tests, including cardiopulmonary exercise tests (CPET) or stair climbs. The standard tests are conducted only at selected healthcare provider locations,...
The issues of software and hardware development are considered of data logging into systems of testing complex objects. The describes the architecture of a system for testing complex scientific-technical objects. In the list of original elements of the concept of building highly reliable, fast-reconfigurable interactive test monitoring and control systems: — using of original technology of representation...
The basis of this study is to create an insight for target vehicle path following or improving situational awareness by using path accumulation and ego-motion compensation. Possible application variants of the strategy, for highways and urban roads are also described. The study is also extended for enhancing path accumulation in noisy environment or sensing by making use of spline based curve approximation...
This paper describes the use of electromagnets to launch Unmanned Arial Vehicle (UAV). The name of the system is Electromagnetic UAV launcher. It harnesses the power of electromagnets to accelerate Unmanned Arial Vehicles on the runway. Enabling shorter runway distance and quicker takeoff. This paper describes the working of E-UAV launcher and the operation of individual components. Building and testing...
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.
The objective of this work is to introduce an autonomous Hovercraft with minimum Energy consumption. To achieve this goal, a computer simulation in addition to practical testing of a simple hovercraft model have been carried out. A mathematical model for the hovercraft is considered and simulated in the MATLAB/SIMULINK environment. A navigation system with Global Positioning System (GPS) integrated...
Detection capability of pulsed eddy current testing device is described and illustrated with an example of an artificial subsurface defect in an electrically conductive steel plate. The investigated eddy current probe is of a differential type, consisting of one excitation and two sensing coils with a ferrite magnetic circuit. The numerical solution is carried out in the COMSOL Multiphysics using...
This paper presents some features of a multi-link space robot ground testing. The scope of the paper comprises the design of the space robot prototype, the architecture of the active ground testing facility and the integrated control system for the robot and the facility. The space robot prototype has two manipulators, which allow the robot to autonomously “walk” from one spacecraft grapple point...
Quad-copter is a type of Unmanned Aerial Vehicle (UAV) which has four rotors as its lifter. This type can do lot movements in the air while flying, such as yaw, roll, and pitch. This movement can work well by maintaining stability, direction, and the height of that quad-copter. Roll corner, pitch, and yaw are controlled so the quad-copter can move stably. Proportional Integral Derivative (PID) is...
In cognitive radio networks, cooperative spectrum sensing schemes improve the reliability of the detection by exploiting decisions made locally by several secondary users (SUs). Soft energy combining schemes provide optimal detection performance by combining the actual sensed information from the SUs, resulting in high cooperation overhead in terms of time, computational complexity, and bandwidth...
Formation of cracks is a major cause of damage in reinforced concrete (RC) structures which adversely affects the durability along-with appearance of structures. Hence, to understand the behavior of RC structural element under different stresses, it is necessary to obtain significant data describing the characteristics of fracture such as types of cracks, its propagation, failure pattern etc. which...
A novel 2-stage testing structure for CMOS pixel sensor (CPS) is proposed here. The test stimuli are based on applying the electrical pulses instead of light stimuli on photosensitive area, for pure electrical test. The voltage stimuli applied is generated by charge-pump phase locked loop (CP-PLL) which is used here as on-chip clock, exploiting the dual role. Existing charge-pump circuit as stimulator...
In recent years, Unmanned Aerial Vehicle (UAV) has been gaining more and more attention for military and civilian utilization. How to monitor its condition is a crucial problem. The accuracy of the sensing data is one of the basic requirements to achieve its correct condition. Thus, one kind of data anomaly detection approaches by Relevance Vector machine (RVM) is proposed in this article. By utilizing...
In recent years, model-based testing (MBT) of automation systems has gained in importance. However, increasing size and complexity of manufacturing plants also lead to larger models, which again cost time and manpower for modeling tasks. An approach to solve this problem is to subdivide the overall model into several separated models of usual components of automation systems which are reusable. Therefore,...
Nowadays, more and more systems are coordinated and controlled to compose globally-distributed, highly-complex systems of systems (SoS). Existing testing methods focus on single devices and on performance characteristics from the network architecture upwards, but ignore the innate complexity caused by the spatial and temporal separation of these systems over vastly differing scales. As a result, quality...
As the use of low-power and low resource embedded devices continues to increase dramatically with the introduction of new Internet of Things (IoT) devices, security techniques are necessary which are compatible with these devices. This research advances the knowledge in the area of cyber security for the IoT through the exploration of a moving target defense to apply for limiting the time attackers...
Intelligent vehicles use surround sensors such as radar, lidar and camera to perceive their local environment. The generated information are processed by a control unit to identify critical traffic situations such as rear-end collisions and trigger reversible or irreversible safety systems. Incorrect measurements can result in accidents with fatal consequences. Therefore, high reliability and accuracy...
This paper is based on two decades of experience with continuous monitoring of Partial Discharge (PD) in medium voltage equipment including Rotating Machines. The technology uses multiple sensors distributed along monitored objects and 1 – 20 MHz frequency range. It allows for additional noise reduction and for localizing of PD activity sources. The importance of continuous PD monitoring vs. periodic...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.