※一部利用できない機能があります
| 1.
論文 |
論文
|
大畠, 克章 ; 斉藤, 正浩 ; 新井, 雅隆
概要:
application/pdf<br />Journal Article<br />The object of this study is to reduce nitrogen oxide using a DC corona discharge. The mixture of (N_2+O_2+NO) was used as the sample gas. After the mixture was passed through the reactor in which
…
corona discharge field was formed, the gas collected at the exit of the reactor using a sampling bag. The components such as NO, NO_2 and N_2O etc. were analyzed with FT-IR and NOx meter. It was found that the characteristics of NO reduction by corona discharge differed remarkably whether or not the oxygen was existing in the mixture. From the measurement of spectrum of light emission by corona discharge in N_2 or (N_2+O_2) atmospheres, several N_2 bands were detected. In the case of N_2 atmoshere, the process of NO reduction was mainly controlled by N_2 radical produced in the corona discharge field. On the other hand, in the case of (N_2+O_2) atmosphere, NO converted to NO_2 by ozone which yielded by corona discharge.
続きを見る
|
||
| 2.
論文 |
論文
|
山田, 功 ; 茂木, 孝之
概要:
application/pdf<br />Journal Article<br />In the present paper, we give the explicit parametrization of all proper internally stabilizing controllers for single-input/single-output continuous time minimum phase systems. This
…
parametrization is simple and does not contain improper controllers, that is, this parametrization contains only proper stabilizing controllers. This parametrization is given using supplemental rational function to hold certain condition and asymptotically stable free-parameter. A characteristic of stabilizing controllers for minimum phase systems is clarified.
続きを見る
|
||
| 3.
論文 |
論文
|
池添, 冬芽 ; 浅川, 康吉
概要:
application/pdf<br />Journal Article
|
||
| 4.
論文 |
論文
|
邵, 毅敏 ; 時任, 朋也 ; 根津, 紀久雄
概要:
application/pdf<br />Journal Article<br />Improving signal to noise ratio is a key problem to detect early faults of machinery under environment noise conditions. An effective method is presented for improving the signal to noise
…
ratio by the adaptive neural network. This paper has made a comparison of failure detect-ability between least-mean-square (LMS) algorithm and adaptive neural network under heavy environment noise conditions. Experiment results have shown that using adaptive neural network is an effective means to extract early symptoms of machine fault under heavy environment noises and low rotating speed conditions.
続きを見る
|
||
| 5.
論文 |
論文
|
HUANG, Zuohua ; SHIGA, Seiichi ; UEDA, Takamasa ; JINGU, Nobuhisa ; NAKAMURA, Hisao ; ISHIMA, Tsuneaki ; OBOKATA, Tomio ; TSUE, Mitsuhiro ; KONO, Michikata
概要:
application/pdf<br />Journal Article<br />A basic characteristics of compressed natural gas direct-injection (CNG DI) co
…
mbustion was studied by using a rapid compression machine. Results show that comparing with homogeneous mixture, CNG DI has short combustion duration, high pressure rise due to combustion, and high rate of heat release, which are considered to come from the charge stratification and the gas flow generated by .the fuel injection. CNG DI can realize extremely lean combustion which reaches 0.03 equivalence ratio, φ. Combustion duration, maximum pressure rise due to combustion and combustion efficiency are found to be insensitive to the injection modes. Unburned methane showed almost the same level as that of homogeneous mixture combustion. CO increased steeply with the increase in φ when φ was greater than 0.8 due to the excessive stratification, and NO_x peak value shifted to the region of lower φ. Combustion inefficiency maintains less than 0.08 in the range of φ from 0.1 to 0.9 and increases at very low φ due to bulk quenching and at higher φ due to excessive stratification. The combustion efficiency estimated from combustion products shows good agreement with that of heat release analysis.
続きを見る
|
||
| 6.
論文 |
論文
|
林田, 和宏 ; 天谷, 賢児 ; 新井, 雅隆
概要:
application/pdf<br />Journal Article<br />NO concentration measurement in the burnt gas from the catalytic combustion was carried out by using a laser-induced fluorescence method. A palladium catalyst supported on a cordierite honeycomb
…
was used. The methance/air mixture, which was pre-heated to 530 K, was introduced into the catalyst honeycomb. To excite a NO molecule, an ArF excimer laser was used. Wavelength of the laser right was set at 193.375 nm. The laser sheet was introduced into the downstream of the honeycomb. In the case of a lean mixture, NO was observed after the honeycomb. On the other hand, in the case of a rich mixture, a blue flame at downstream from the honeycomb were observed, and NO was observed at the blue flame. In order to obtain the NO concentration from the NO fluorescence intensity, temperature dependency of the fluorescence intensity was investigated by using NO-N_2 mixture. Axial concentration distributions of NO were derived from the NO fluorescence intensity distributions. Furthermore, change of the NO emission level with equivalence ratio was investigated at the outlet of the honeycomb.
続きを見る
|
||
| 7.
論文 |
論文
|
中村, 敦雄
概要:
application/pdf<br />Journal Article
|
||
| 8.
論文 |
論文
|
西川, 剛弘 ; 西川, 弘 ; 小保方, 富夫 ; 石間, 経章
概要:
application/pdf<br />Journal Article<br />Characteristics of the multistage high pressure reciprocating compressor, which expects to obtain outlet pressure over 30 MPa, have been studied. For improvement of volumetric efficiency, the
…
performance characteristics are comprehensively studied by comparing the numerical results with those of experiments. These measures of pressure pulsation, valve dynamic behaviors and flow rate have been executed by experiment. Using the numerical simulation code of STAR-CD, which assumed three dimensional, compressible and unsteady flow, the dynamic phenomena of compressor parts has been demonstrated. Consequently, parameters that need for improvement of flows in the compressor have been discussed.
続きを見る
|
||
| 9.
論文 |
論文
|
山田, 功
概要:
application/pdf<br />Journal Article<br />In the present paper, we consider simultaneous stabilizing problem for multivariable systems. At first we propose a simple state space design procedure of simultaneous stabilizing controller
…
using filtered inverse systems for the system having no zero in the closed right half plane. Next the procedure is expanded for the system having some zeroes in the closed right half plane. Freedom of the simultaneous stabilizing controllers are clarified. The proposed methods are built based on state space description, therefore the proposed methods have many advantages such as easy computation and so no.
続きを見る
|
||
| 10.
論文 |
論文
|
山田, 功 ; 飯田, 寛之 ; 工藤, 直樹
概要:
application/pdf<br />Journal Article<br />In the present paper, we examine a design method for master-slave systems of bilateral control systems. In master-slave systems, human operator works to achieve tasks via the master and
…
the slave system. The slave system contacts the environment and works the tasks. According to past studies, when the dynamics of environment is treated as uncertainties, the number of unstable poles of the slave system is required to be equivalent to that of the slave system with the dynamics of the environment. In some cases, the number of unstable poles of the slave system with the dynamics of environment is different from that of the slave system. We propose a simple design method of bilateral control systems such that the number of unstable poles of the slave system with the dynamics of environment is different from that of the slave system without the dynamics of the environment.
続きを見る
|
