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.
In this paper, we propose a nonlinear control method for an interior permanent magnet synchronous motor (IPMSM) with dynamic copper loss minimization based on control Lyapunov function (CLF). A CLF based controller has advantages on simple control structure. We design a CLF considering copper loss minimization for IPMSM. Using the obtained CLF, we propose a controller to stabilize a desired torque...
In this paper, we propose an efficient computational resource distribution scheduling scheme for information retrieval from multiple information sources in a large-scale network in the case where a user requests multiple target contents simultaneously. This scheme can restrain costs for contents searching and retrieval by limiting the effective area of connection from an information source to computational...
Rapid advances in robot technology have been made in recent years. In connection with these advances, robots are expected to be utilized in a variety of places and environments. This study describes, (1) a method which allows a robot to measure the location of its destination in the real world based on an image obtained from a single camera, and (2) a method of navigating a robot to a destination...
Nonlinear receding horizon control (NRHC) attracts much attention in recent years. For NRHC, C/GMRES proposed by Otsuka is one of the most effective methods. Generalized minimal residual method (GMRES) is employed in C/GMRES, however, GMRES may become numerically unstable under some conditions in the sense of numerical calculation. This results in instability of the controlled system in the sense...
Power management of web server clusters have become a critical design issue because of its increasing power consumption and cooling cost. Current web server clusters are normally designed to have a performance capacity to handle peak loads, where all servers are fully utilized (turned on and running at maximum frequency). But in practice, peak load conditions rarely or never happen and most of the...
In a 32btimes32b multiplier, when the bit width of both operands is less than 16-bit, the upper array of the multiplier computing the upper bits of the product does not need to operate and hence consumes wasteful leakage energy. We propose a technique to control run-time power gating (RTPG) for the upper array by dynamically detecting the operand width. Since RTPG suffers from energy overhead due...
The authors propose an extension of SysML which enables description of continuous-time behavior. The authors also develop its execution tool integrated on Eclipse-based platform by exploiting co-simulation of SysML and MATLAB / Simulink. To demonstrate the effectiveness of the tool and the extension to SysML in verifying specifications of an embedded system, we create a sample model and analyze its...
Receding horizon (RH) control attracts much attention in both the control theory and control applications. For RH control, we have proposed a new computation method for solving simultaneous linear equations by using a Moore-Penrose pseudoinverse and a singular value decomposition (SVD). In our proposed method, SVD is achieved by mdLVs and newly developed simultaneous error correction (SEC) method...
This paper presents a novel power reduction method for chip multi-processors (CMPs) under real-time constraints. While the power consumption of processing units (PUs) on CMPs can be reduced without violating real-time constraints by dynamic voltage and frequency scaling (DVFS), the clock frequency of each PU cannot be determined independently because of the performance impact caused by the conflict...
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.