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 paper presents a new and effective multisensor based control strategy for high-accuracy/precision and high-efficiency automatic robot localization and calibration. The strategy combines both coarsely visual servo and fine position-sensitive detector (PSD) servo control methods. In a large field of view, an image-based visual servo control system is developed to roughly guide the laser beam, which...
This paper addresses the quantification and allocation of peaking costs of hydrothermal power systems under electricity market environment. Mixed-integer linear formations of market scheduling of hydrothermal power systems is described, with the maximum ramping up/down limits and minimum start/off time limits of thermal generators, as well as the generation quantity and hydraulic vibrations of hydropower...
In this paper, our recently developed high precision robot localization system employing high resolution (0.5 mum) position sensitive devices (PSD) is presented. The system is comprised of a structured laser pointer system attached to the robot end-effector and a PSD fixture. It is capable of feeding back the movement information of the TCP relative to the PSD frame. This is achieved by detecting...
This paper presents on-pendant assembly parameter optimization with an industrial robot with force control. ABB industrial robot and its latest controller IRC5 is used as the host platform of the development; design of experiment (DOE) method is used as an optimization tool; and automatic transmission torque converter assembly is used as a test case. All tasks such as data manipulation, data analysis,...
This paper presents the recent progress of using robotics in automotive powertain assembly manufacturing processes. After briefly describing force control and vision-guided robot (VGR), we introduce successful implementation of robotic assembly for transmission torque converters, VGR-based engine head assembly, transmission valve body assembly and engine piston installation. Then we discuss other...
The national weather radar testbed (NWRT) has a 10-cm phased array radar that is used primarily for monitoring the weather. It is attractive compared to the current parabolic dish weather surveillance radar-88 Doppler (WSR-88D) because of its capability to electronically steer. When combined with the recently developed beam multiplexing technique that uses a small number of contiguous samples and...
We present two-dimension gallium nitride (GaN) quantum-well (QW) diode laser (LD) simulation using Rsoft LaserMOD. The optical mode patterns are calculated and analyzed by the transfer matrix and Ritz Iteration. Our study is focus on the ghost mode reduction in the GaN laser design and laser performance.
This paper presents engine piston installation using industrial robots. Because the current manual and hard automation engine piston installation systems are either labour intensive or inflexible and costly, the three-robot and two-robot piston installation systems are developed and investigated. The robotic piston installation process is simulated. A robotic piston stuffing gripper with ring detection...
This paper presents a model for determining the first and second order statistics of the lifetime of a battery-operated node. This model assumes knowledge of the statistics of duration and consumption of the tasks that can be performed by the system, as well as of the statistics of the task occurrences and of the remaining charge in the battery. The latter may be monitored by an onboard sensor. Knowledge...
In this paper, mono-color and full-color FED prototypes of various sizes and resolutions have been fabricated. Video display has been demonstrated. The results show that the newly developed screen-printed CNT composite cathode is suitable for large area high resolution display application.
A novel load insensitive power amplifier (LIPA) with balanced structure is developed for 3G (HSDPA and HSUPA) handset application at PCS band from 1850-1910 MHz. No external regulated voltage and analog voltage supplies are required at high power level and it is compatible with DC-to-DC converters. Digital or analog control may be applied to further improve its PAE at low and middle power levels....
This paper proposes a new minimum variance spectral estimation (MVSE)-based time-frequency analysis (TFA) for click-evoked otoacoustic emissions (CEOAEs). The conventional MVSE is extended to TFA by windowing the observation data to obtain a time-frequency distribution for the time-series. Based on the characteristics of CEOAEs, the window size is given a small value at high frequencies and a large...
The growth of GaP and AlAs/GaAs/GaP heterostructure nanowires on Si using Au colloids as catalysts was investigated. For GaP nanowire growth, we found an epitaxial relationship between the GaP nanowires and Si substrate. The AlAs/GaAs/GaP heterostructure nanowires were found to grow vertically on Si. Structural analysis indicates that the hetero-interfaces are within several atomic layers in thickness...
This paper introduces two new time-frequency analysis methods originated from the minimum variance spectral estimation (MVSE) for nonstationary time-series. First, a windowed MVSE (WMVSE) extends the conventional MVSE by windowing the observation data to obtain a time-frequency distribution for the time-series. Moreover, the window lengths are selected adaptively by the intersection of confidence...
As chip I/O count continues to increase, the C4 bump pitch needs to be further reduced. In this work, a Si-based test carrier was used for characterization of ultra-fine pitch micro C4s. Successful assembly and rework of die with 11,892 micro C4s were demonstrated. The micro C4 contact resistance was measured for various pad geometries. The mechanical shear force was characterized for several variables...
In order to significantly improve the situation awareness, the operators or operations engineers in the energy management systems and the regional and sub-regional security coordinators of large interconnected systems need to know in real-time the large system disturbance events such as generator outages, load outages and transmission outages over an entire interconnection. This paper describes a...
A Si3N4/SiO2 double-tunneling layer is incorporated in a MONOS memory device structure with high-k HfO 2 charge storage layer for NAND-type memory application. Fast erasure of charges trapped in the high-k layer is enabled by enhanced hole current, accomplishing a large memory window of 2.9 V with electrical stress at 17.5 V for 100 (as and at -18 V for 5 ms. Incorporation of 1.6-1.8 nm thick Si3N...
In this paper, inter layer dielectric characteristic ramped voltage breakdown (VBD) performance of multiplayer Cu/SiOC interconnect was studied. The results showed that the breakdown reliability is highly process-related. Some dominating factors, such as via etching process, integration scheme used and Cu/dielectric interface etc., were discussed and proposed to improve breakdown reliability performance
Cast aluminum wheels must be deburred and polished before chrome plating operation. Manual deburring and polishing is tedious and monotonous. Industrial robots are attracting more and more attention for the deburring applications. However, Each wheel path program was taking eight to ten weeks to create because the position and orientation of the deburring tool must be accurately identified based on...
When a brief current pulse is incident on excitable cells in cardiac and other nervous tissue, a change in phase of the cell's response is usually observed. In cardiac tissue, the cells are bared to external stimulation of generally positive currents, which depolarize the cells. In this paper an overview of the application of the phase resetting technique (PRT) in several cardiac models is presented...
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.