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.
The article is devoted to the study of drying process of list material under the action of high-intensity ultrasonic vibrations. The advantages of ultrasonic drying and possibility of its practical realization are described in the article. The ultrasonic drier applied in practice of ultrasonic drying of list materials was proposed and developed.
Equipment support system is the premise and foundation of equipment support work whose physic entity is support resource and operation entity is equipment support force. Equipment support force is the entity form of equipment support system. Based on the analysis of the properties of equipment support system, the article expounds the essence of equipment support construction in the construction of...
Micro end-milling is a highly-efficient machining process and can be used to machine high hardness metal mold directly; therefore, it is applied to the machining of micro channel structures. There are conventional methods to fabricate the micro channels such as lithography, etching and laser processing; however, they have some demerits of high cost, limitation of materials and complex processes. Machining...
Organization research is the most important aspect in project management, introducing system science to the new paradigm of organizational research is the trend of organization theory. This paper analyzes the connotation of project organization on the basic of systematic thinking, demonstrates that project organization system is a typical self-organization system from the aspects of open, instability,...
Many robotics applications require contact with the environment, from traditional pick and place task to legged locomotion. Nevertheless, to increase adaptability to different terrains it is necessary to know its concact properties. These properties can be known beforehand or extracted from contact forces. In this paper a practical evaluation using adaptive filtering techniques to extract the properties...
This paper presents the design, fabrication, and testing of a compliant rotary nanopositioning stage for precision engineering applications. The major advantage of the rotary stage lies in that it possesses a large rotational range and a compact size simultaneously. A new idea of compound radial flexure is proposed to enable this merit. A novel rotary stage is designed to provide a rotary angle over...
Impact behaviors of high-power LED are essential due to the possible poor adhesion of interfaces and should be studied. In this study, the analysis of dynamic response for high-power LED module under impact load is conducted with simplified theoretical analysis, experimental testing and numerical simulation. A self-made microelectronics drop impact tester is established. Then reliability performances...
Requirements for thermocompression bonding (TCB) successfully are dependent on the material as well as the area required to join. One of the paths for 3D integration is bonding Cu to Cu bumps or TSV's to bumps. A second path is by integrating fine pitch high density array of bumps, which may equate to >37000 bumps in a 8×8mm die size. Both require a significant amount of pressure as well as temperature...
Resistance spot welding systems which are based on medium-frequency inverters are recently gaining in importance and are being used for welding of steel sheets for automotive sector. This paper focuses on deriving out the energy efficiency of the Medium Frequency Direct Current (MFDC) technology over AC power source. MFDC have been chosen for the study due to its improved consistent power factor,...
One of the possibilities to safely transport ESD sensitive devices is the use of the so-called JEDEC trays. The paper describes and assesses the current situation for test methods to characterize their ESD properties. It also evaluates the risk for devices due to the inhomogeneity of the currently used materials for conductive/dissipative trays.
In the paper a two decades long development of low velocity penetrators and devices derived from them in Space Research Centre is presented. The case study is penetrator developed for the Philae lander on the Rosetta that laid the fundament for further constructions. Two main Rosetta penetrator mechanisms described here are: the insertion mechanism that is based on a electromagnetic hammer and the...
Water droplets that form on the surface of outdoor insulating materials have the ability to experience deformation when subjected to an external electric field. This paper aims at studying the electromechanical effect the droplet experiences when subdued to an external AC voltage. Single and multiple droplets were placed on a piece of insulating fiberglass between an energised and grounded copper...
This paper presents for the first time the scaling rules of piezoelectric nanowires (NWs), as the active transducer element for sensors and mechanical energy harvesters. Moreover, to keep close to realistic structures, non-linear effects associated to large displacements were taken into account, as well as the influence of NW variability, based on experimental data. We demonstrate that well-above-state-of-the-art...
A tactile sensor for slip detection is necessary for human- like grasping in robot hand. This paper reports a capacitive tactile slip sensor that can detect slip on the surface of the sensor structure. The newly developed capacitive slip sensor uses acrylo-nitrile butadiene rubber (NBR) as substrate. The presented sensor device in this paper has fingerprint - like structures that are similar with...
Recently, it has been researched to adopt the dual arm robot at the packaging and assembly line of an electric device such as a mobile phone. At the research area of the end-effector development, it is necessary to extract demanded functions and to allocate these functions to allowable numbers of end-of-arm-tool (EOAT). On allocating steps, it is often occurred that one EOAT must grip materials with...
Titanium alloys and Inconel 718 are used in airplane bodies. Pure titanium alloys are used in medical equipment. Wet cutting, which generates a significant amount of cutting fluid, is adopted for the cutting of these difficult-to-cut materials. When near-dry cutting, which is environmentally friendly, is used instead, it easily damages tools, and the stock removal rate and machining accuracy worsen...
This paper describes a new method and a set of equations for calculating the force-deflection characteristics of the catenary anchor leg. The traditional catenary equations reference horizontal deflection of the catenary top to the catenary generation point which is used to mathematically ?generate” the catenary curve shape. The catenary generation point is not stationary; its horizontal and vertical...
This paper describes an analysis of the power assist and the skill assist effects of a semi-active assist mechanism based on an energy control. For this mechanism, we have developed a soft and flexible power assist device that consists of an elastic material and a small direct current motor. The assist force is then the elastic force, which is controlled by adjusting the length of the elastic material...
A compliant 2-DOF nanopositioning stage with a novel concept of dual-mode driven is proposed in this paper aiming to improve the scanning performance of the Atomic Force Microscope (AFM). The stage is featured with nanoscale positioning precision, high bandwidth, long scanning range and fully decoupled structure, which can be selected to work in dual working modes. Based upon the matrix method, the...
The amphibious robot is so attractive and challenging for its broad application and its complex working environment. It should walk on rough ground, maneuver underwater and pass through transitional terrain such as sand and mud, simultaneously. To tackle with such a complex task, a novel amphibious robot (AmphiHex-I) with transformable leg-flipper composite propulsion is proposed and developed. This...
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.