An electromagnetic-type vibratory feeder of is a typical transportation device used in automatic weighers. As existing feeders are driven by feedforward control, the so-called "firing angle control", the dri...
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An electromagnetic-type vibratory feeder of is a typical transportation device used in automatic weighers. As existing feeders are driven by feedforward control, the so-called "firing angle control", the driver cannot negate sudden disturbances. In this study, we consider applying a feedback control for such a feeder system. First, we give the two details of modelings for the vibration part and for the electromagnetic force part. Next, a feedback control system is constructed for the electromagnetic vibration feeder for which we propose a two-degrees-of-freedom proportional plus integral plus derivative (PID) controller with nonlinear elements. Next, we apply the feedback control to the feeder with a standard trough. Finally, we consider a method compatible with many varieties of troughs by adjusting a nonlinear element. On the basis of the results of some experiments, we confirm that the two-degrees-of-freedom PID control is more effective than the conventional firing angle control.
We present several results on de Morgan algebras and Kleene algebras of fuzzy logic. The main results include (1) a necessary and sufficient condition for a de Morgan algebra to be a Kleene algebra, (2) equivalence of...
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We present several results on de Morgan algebras and Kleene algebras of fuzzy logic. The main results include (1) a necessary and sufficient condition for a de Morgan algebra to be a Kleene algebra, (2) equivalence of some expressions, (3) some properties about de Morgan algebras with sup W/sup +/ and inf W/sup -/, (4) some properties of the de Morgan algebras which satisfy certain special conditions, (5) a method to obtain all fixed points of a de Morgan algebra and (6) extensions of some theorems on complete de Morgan algebras that have fixed points to the general case.
Because tools in real world operate the object in order to attain a specific purpose, it is possible to forecast the movement to some extent. So action of hands to operate the tool to attain a purpose is measured befo...
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The concept of an embodied interaction robots system based on speech is proposed for assisting human interaction by generating the motions of robots coherently related to speech. For an essential human interaction mod...
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It is indicated that there is the high possibility of disagreement between the evaluation of shape in virtual space and that in real space. We (1999) previously proposed the system for shape evaluation that integrates...
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It is indicated that there is the high possibility of disagreement between the evaluation of shape in virtual space and that in real space. We (1999) previously proposed the system for shape evaluation that integrates the visual information in virtual space and the tactile and gazing line-motion linkage information in real space. In this paper, the preferences of 3D shape images in the proposed virtual space under two experimental conditions were compared with that of the real photo-forming products made from the same data by the sensory evaluation of paired comparison and the questionnaire analysis. It was found that the preference for shapes was consistent in both spaces in the relation of the preference among shapes based on the Bradley-Terry model in sensory evaluation. This shows that the proposed system provides almost the same environment as the real space for 3D shape evaluation. The results of questionnaire also indicate that the proposed system is enough to evaluate the 3D shapes in virtual space.
This paper proposes a novel combined compound splitting and phrase recombination method that optimizes the composition of the speech recognition lexicon for a given domain. Data-driven compound word splitting is follo...
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ISBN:
(纸本)7801501144
This paper proposes a novel combined compound splitting and phrase recombination method that optimizes the composition of the speech recognition lexicon for a given domain. Data-driven compound word splitting is followed by iterative recombination of high frequency combinations. Language model perplexity and size are the criteria used to identify a balance between compound decomposition, which reduces OOV, and lexical unit recombination, which packs additional context into a fixed-size vocabulary. The method provides a basis for lexicon design for a LVCSR system on the domain of German parliamentary speeches that is to be used as the foundation of a spoken document information retrieval system. The approach achieves a 35% reduction in OOV without a prohibitively large sacrifice in recognition performance.
In robot soccer, as well as in real soccer and in every team effort, coordination between members of a team is a key issue. We describe the coordination strategies that were designed to achieve effective cooperation b...
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In robot soccer, as well as in real soccer and in every team effort, coordination between members of a team is a key issue. We describe the coordination strategies that were designed to achieve effective cooperation between a robot goal-keeper and the rest of the ART (Azzurra Robot Team) team that participates in the RoboCup F-2000 (midsize) competitions.
We present the Websim project, a simulation environment for self-developed simulation tools. It provides Web and distributed features for a simulation model or library created using the C/C++ language. Websim is imple...
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We present the Websim project, a simulation environment for self-developed simulation tools. It provides Web and distributed features for a simulation model or library created using the C/C++ language. Websim is implemented using CGI and Javascript technologies. It can be accessed on any platform (Unix, PC or Mac) using a standard Web browser. With this simulation environment, an easier and faster integration of simulation and visualization techniques and tools into the Internet will be supported. The possibilities and problems of these techniques are discussed.
An efficient algorithm is proposed for finding all solutions of piecewise-linear (PWL) resistive circuits using linear programming (LP). This algorithm is based on a simple test (termed the LP test) for nonexistence o...
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An efficient algorithm is proposed for finding all solutions of piecewise-linear (PWL) resistive circuits using linear programming (LP). This algorithm is based on a simple test (termed the LP test) for nonexistence of a solution to a system of PWL equations in a given region. In the LP test, the system of PWL equations is transformed into an LP problem, to which the simplex method is applied. Such an LP problem is obtained by surrounding the PWL functions by rectangles. It is shown that the LP test can deal with nonseparable functions of more than one variable by using more than two-dimensional rectangles. It is also shown that, for bipolar transistor circuits, the LP test becomes more efficient and more powerful by surrounding the exponential functions by right-angled triangles. The proposed algorithm is simple, efficient, and can be easily implemented.
The provision of multimedia application services over mobile wireless network is a very challenging problem. One major problem encountered is the maintenance of the QoS satisfaction for every application running over ...
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The provision of multimedia application services over mobile wireless network is a very challenging problem. One major problem encountered is the maintenance of the QoS satisfaction for every application running over the network. Wireless ATM (WATM), as one of the next generation wireless system, is expected to provide such a service. After reviewing four current projects dealing with QoS management in the wireless network, this paper presents our approach to deliver an alternative solution to the problem, which is called AdQoS (adaptive QoS). This system introduces some improvements over the other systems. The comparison among the techniques are presented and discussed.
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