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.
Model-based testing helps test engineers automate their testing tasks so that they can be more cost-effective. When the model is changed due to the evolution of the specification, it is important to maintain the test suites up to date for regression testing. A complete regeneration of the whole test suite from the new model, although inefficient, is still frequently used in practice. To handle specification...
Testing and debugging account for at least 30% of the project effort. Scientific advancements in individual activities or their integration may bring significant impacts to the practice of software development. Fault localization is the foremost debugging sub-activity. Any effective integration between testing and debugging should address how well testing and fault localization can be worked together...
A novel stress-sensitive nanocomposite that can be used as flexible force sensors with tailored sensitivity was fabricated. The nanocomposite consists of MWNTs as conductive filler and SBS as polymer matrix. Some electrical and mechanical properties of MWNT/SBS films were measured. A typical percolation phenomenon was observed with the MWNT/SBS composites. The elastic modulus and Poisson's ratio of...
Aim at need of project logistics in practice, a parameter evaluating system about leaguer of virtual enterprise is presented, and then the BP neural network model of qualification layer and target layer of this system are build and modularized. Based this, a double layer and intelligent estimating model is built. The Modularized, double layer structure of this model is propitious to update and develop...
The interest in multi-phase (number of phase higher than three) machines for high performance applications has been growing in recent years due to their potential advantages over three-phase machines. This paper presents an approach to implement sinusoidal pulse width modulation (SPWM) in a multi-phase inverter. A universal multi-phase voltage source inverter (VSI) is constructed, which is based on...
Two magnetic fields produce radial force on rotor when the difference of their pole pair numbers is 1. Based on this principle, this paper introduces the bearingless motor with a single set of 5-phase windings. The MMF waveform produced by multiphase windings is analyzed, based on which the winding configuration of 5-phase bearingless motor is introduced. The two needed magnetic fields are produced...
Conventional bearingless motor has two sets of 3-phase stator windings. The main winding is used to produce torque, while the suspension winding is utilized to produce radial force. This paper proposes a new multiphase bearingless machine with a single set of multiphase windings, taking advantage of the multiple control degrees of freedom in multiphase machine. Two groups of currents are fed to the...
Compared with their three-phase counterparts, multiphase machines with phase number n ges 5 have many advantages like lower torque pulsation, higher power density, better fault tolerance, etc. Due to these advantages and the increasing demands on high performance and high power adjustable speed drives, the research on multiphase drives has experienced a significant growth since the end of last century...
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.