Ever more complex sensors have become available to create and maintain situational awareness during missions. Choosing the most suited sensor for the execution of a sensor function is based on sensor capabilities and ...
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Ever more complex sensors have become available to create and maintain situational awareness during missions. Choosing the most suited sensor for the execution of a sensor function is based on sensor capabilities and function attributes. When these characteristics change rapidly, sensor allocation for sensor functions will shift. To increase performance of the entire sensor network, the total set of sensors should be scheduled in a single system. This paper puts forward and compares three new methods for scheduling prioritised tasks in sensor networks. The first is based on fuzzy Lyapunov synthesis. The other two use a genetic algorithm (GA) to optimize the set of schedules. The second scheduler uses this set to (re)train a neural network to be used online. The third approach is a novel online use of the GA. Tests showed that the novel online GA leads to a robust scheduling algorithm with high overall performance.
This paper presents the novel method not only to suppress the input current harmonics but also to realize the low frequency output voltage ripple using the multiple-input ac-dc converter, which is considered from view...
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We employ set oriented methods in combination with graph partitioning algorithms to identify key dynamical regions in the Sun-Jupiter-particle three-body system. Transport rates from a region near the 3∶2 Hilda reson...
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We employ set oriented methods in combination with graph partitioning algorithms to identify key dynamical regions in the Sun-Jupiter-particle three-body system. Transport rates from a region near the 3∶2 Hilda resonance into the realm of orbits crossing Mars’ orbit are computed. In contrast to common numerical approaches, our technique does not depend on single long term simulations of the underlying model. Thus, our statistical results are particularly reliable since they are not affected by a dynamical behavior which is almost nonergodic (i.e., dominated by strongly almost invariant sets).
A test structure and method for two-dimensional analysis of hot-carrier-induced photoemission in n-MOSFETs are presented. Photoemission intensity profiles along the gate width direction are analyzed and a method to de...
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A test structure and method for two-dimensional analysis of hot-carrier-induced photoemission in n-MOSFETs are presented. Photoemission intensity profiles along the gate width direction are analyzed and a method to derive the precise peak position of photoemission intensity from the center of the MOSFET gate is proposed. It can measure the variation of the photoemission peak position along the gate width direction. The peak exists in the LDD region, and the distance from the gate edge is about 20/spl sim/30 nm independent of V/sub G/.
Today there is an increasing need for robots which move autonomously and work various operations. The robot taken up in this paper is two wheeled vehicle which has 6-D.O.F manipulator. Considering the position estimat...
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Today there is an increasing need for robots which move autonomously and work various operations. The robot taken up in this paper is two wheeled vehicle which has 6-D.O.F manipulator. Considering the position estimation of the vehicle, the conventional method is Dead-Reckoning method, which accuracy of estimation is almost good. But once slip occurs to the vehicle, a position estimated from dead-reckoning loses accuracy, because of wheelspin. Slip environment is often seen in our living space. So a wheeled robot has to detect a slip and compensate for the error. Counting the issue described above, mobile robot should have some sensors which obtains its position and attitude in noncontact from the floor. So in this paper, the method using optical sensor to estimate the vehicle position is proposed. This method is called Optical Dead-Reckoning (ODR) method. Two optical sensors mounted under the vehicle body is going to scan the floor and detect vehicle movement. The value obtained from ODR has no error of slip and friction of floor. Based on this ODR method, optical sensors are mounted on the actual robot, and some experimental results are shown.
In the paper the basics of modelling and simulation of production processes will be introduced. The authors will show the advantages of computer aided model investigations as well as limitations in application of thes...
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In the paper the basics of modelling and simulation of production processes will be introduced. The authors will show the advantages of computer aided model investigations as well as limitations in application of these investigations. The simulation methods will be discussed, with special regard to the object-oriented and event-driven programming languages and simulators. In the application part (practical part) the example of utilization of DOSIMIS-3 package in modelling, simulation, animation, as well as the analysis of chosen production processes will be shown. DOSIMIS-3 is a modular-oriented, graphical interactive standard simulator. The simulator works event-discrete and enables simulation of time-discrete material flow systems, manufacturing systems and logistic systems. The practical examples presented here will show the possibility of efficiency improvement in production processes thanks to the utilization of simulation studies.
Most of people can drive a car, ride a bicycle or handle shopping cart, which geometrically involve nonholonomic constraint Nonholonomic system offers people an intuitive system to handle simply. As an application of ...
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An architecture design of the intelligent agent for speech recognition and translation is presented in this paper. The design involves the agent architecture and the method of the agent is used. The architecture desig...
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In this paper, a new method is proposed to achieve both clean effluent quality and low operational cost simultaneously. This is accomplished by minimizing the certified cost function directly through an extremum seeki...
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Nonholonomic constraint offers people an intuitive way to handle systems. As an application of this human ability, we set a virtual nonholonomic constraint on the end-effector of a robotic manipulator. The operator ho...
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Nonholonomic constraint offers people an intuitive way to handle systems. As an application of this human ability, we set a virtual nonholonomic constraint on the end-effector of a robotic manipulator. The operator holds its end-effector and moves it as if he/she was using a shopping cart or a barrow. We use anisotropic impedance control to realize the constraint. The end-effector is able to rotate and move toward itself, but not vertically. A reaction torque observer is applied to recognize the force by the operator in order to make the system sensorless. This system offers several applications, for example, to correct a vibrating hand working on complex jobs like manufacturing and surgery.
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