All issues
Volume 53, Issue 2
Displaying 1-14 of 14 articles from this issue
- |<
- <
- 1
- >
- >|
-
K. NAMIKAWA1991 Volume 53 Issue 2 Pages 1-2
Published: 1991
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (2189K) -
Analyses of Installing Angle of Lug Trailing SideTadashi KISHIMOTO, Jun SAKAI, Eiji INOUE1991 Volume 53 Issue 2 Pages 3-11
Published: 1991
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn the Part 2 of this study, interactions between a lug trailing side and soil were analyzed, and the result was that the lug trailing side was mainly related to the generation of motion resistance and flotation.
In this paper, the design theories for the installing angle of the lug trailing side were obtained for improving wheel performance with the idea to reduce the motion resistance produced by the side. The design equations for the installing angle are expressed by travel reduction, lift reduction and wheel dimensions.View full abstractDownload PDF (1273K) -
Steady Steering CharacteristicsShu-huai ZHANG, Hideo TERAO, Masahira UENO, Kohichi FUJITA1991 Volume 53 Issue 2 Pages 13-21
Published: 1991
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSTo analyze the steering characteristics of tractor-trailer combinations (TTC), a dynamic model was proposed, and the non-linear simultaneous equations for the steering movement were derived. The results calculated numerically for the steady steering movement were compared with test results. The verification was carried out by a four-wheel balanced trailer of 4WS. The results agreed well with the theoretical results. It will enable one to improve the steering characteristics of four-wheel balanced trailer. In the paper the state equations of TTC will be derived, and the application of optimal control into TTC system will be analyzed.View full abstractDownload PDF (1310K) -
Munehiro Takai, Kenshi Sakai, Shun-ichi Hata1991 Volume 53 Issue 2 Pages 23-32
Published: 1991
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSPower driven trailer is a type of trailer whose wheels are driven by tractor PTO shaft or another engine. Trafficability of a tractor-power driven trailer system was analyzed using a static model. In this model, relation between tractor coefficient and slippage was modeled after a simplified Bekker's equation, and the model was validated by the field experiments on a plowed field. A perameter study using the model was done to analyze the effects of the peripheral velocity ratio of tractor rear wheels to trailer wheels, the axial load of the trailer and the working resistance simulated as the digging force of a potato digger or a beet digger. The peripheral velocity ratio of tractor wheels to trailer wheels (Rs) was varied from o to 2.0. It was clarified that the Rs should be set under 0.8 in order to prevent the trailer from pushing the tractor. The total required power of the system increased as the peripheral velocity ratio Rs increased, but the energy consumption per unit travel distance decreased as the Rs increased.View full abstractDownload PDF (1628K) -
Measurement of Soil Stresses and Displacements in Tillage with a Rotational Motion Blade and Double BladesSatoshi YONEKAWA, Osamu KITANI, Tsuguo OKAMOTO, Naoki SAKAI1991 Volume 53 Issue 2 Pages 33-39
Published: 1991
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA measuring system to get data for analyzing a soil-tillage tool interaction was developed. The miniature soil stress-soil displacement sensor, the soil processing equipment and the soil bin test device which were parts of this system were reported in the part 1 and 2. Analyses of a series of experiments on soil compaction and soil cutting using a rectilinear motion blade were also reported.
This paper describes a series of experiments using a soil cutting blade with a rotational motion and using double blades with synchronous movement.
Various data in the interaction such as draft, torque of blade shaft, soil stress, strain, movement, and deformation were obtained by means of this system.View full abstractDownload PDF (1180K) -
Field Performance of Rotary Subsoil Breaker with a Chisel Type SubsoilerYoshiaki MISAO1991 Volume 53 Issue 2 Pages 41-51
Published: 1991
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe purpose of this paper is to develop a machine capable of breaking subsoil mechanically and to clarify the parameters which affect to the fundamental designs.
The rotary subsoil breaker with a chisel type Subsoiler is composed of a rotary tiller with small blades and a chisel type subsoiler to break subsoil in advance and forced to bring the rotary tiller into deep layer quickly.
This paper describes the field performance such as the failure resistance for chisel type subsoiler, the failure torque for rotary, the shape of soil surface disturbed, the soil hardness, the pulverization and displacement of soil disturbed by the rotary subsoil breaker with a chisel type subsoiler as influenced by the rotational velocity of the rotary.
As a result, the soil failure torque of rotary increases as the soil failure depth of rotary increases. And more soil failure power is required at the higher rotational velocity of the rotary. However, at the higher velocity, the soil failure specific power decreases, since the soil failure depth is deeper.
It is recognized that the soil clods are smaller and are transported farther, since the soil failure pitch decreases.View full abstractDownload PDF (1518K) -
Proof Test for Performances and the Programming for Optimum ArrangementPeng CHEN, Jun SAKAI, Ryozo NOGUCHI1991 Volume 53 Issue 2 Pages 53-61
Published: 1991
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn this paper, the “performance graph” is proposed according to the simulation method discussed in our previous paper as a new method to estimate the performance of a rotary shaft. It was proved through experiments that the simulation results are very useful and practical for the optimum design of rotary shaft.
Since an extraordinarily great number of calculations are required to estimate the performance of all kinds of blade arrangements of a rotary shaft, it is effective to build the [DATA BASE] of Pareto optimum arrangements by using multi-stage dicision process.View full abstractDownload PDF (1512K) -
Turning Angle Control System and its Control PerformanceKoji KITO, Isao NISHIMURA, Tsuneo KAWAMURA1991 Volume 53 Issue 2 Pages 63-70
Published: 1991
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSTo realize an automatic turning control in a head-feeding combine at field ends under harvesting conditions, it is important to detect exactly the actual turning angle of the combine. This will minimize error in determining the turning angle that results from the skidding of combine tracks.
An angular rate sensor is used to detect the actual turning angles and these are integrated by a microcomputer. In order to reduce the calculation time, this system utilizes two microprocessors, one of which is used exclusively to calculate the turning angles and the other is used to control the whole system. In this paper, the turning angle control system is described and its performance is analyzed.View full abstractDownload PDF (1279K) -
Satoshi MURATA, Toshio KAWANO, Fumihiko TANAKA1991 Volume 53 Issue 2 Pages 71-77
Published: 1991
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDrying characteristics of cereal powder were measured and analyzed by using TGA (Thermo Gravimetric Analyzer). The results revealed that
(1) The cereal powder with initial moisture contents above about 20%d.b. dryed in the first falling rate period, followed by the second falling rate period. In the 2nd falling rate period the diffusion coefficients were not constant, and the diffusion equations became non-linear.
(2) The drying constants in the first and second falling rate period were measured. It could be confirmed that the both drying constant had Arrhenius type temperature dependency.
(3) The drying rates in the second falling rate period were estimated from the numerical solutions of the introduced non-linear diffusion equation by CRANK-NICOLSON method, and the results agreed well with the measured results.View full abstractDownload PDF (1080K) -
Mamoru NISHIOKA, Kazumichi YANAGISAWA, Nakamichi YAMASAKI, Shigeaki YA ...1991 Volume 53 Issue 2 Pages 79-86
Published: 1991
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe aim of the present study is to decompose night soil by a hydrothermal reaction system. Four kinds of simulated night soil were decomposed by the hydrothermal method using an autoclave. A continuous reaction apparatus was produced, and then the night soil was continuously decomposed by this apparatus.
From the results using the autoclave, all simulated night soil were decomposed over 80%, when the conditions of hydrothermal reaction were at 300°C, for 10min, at 4MPa of O2 gas. The continuous decomposition of night soil was successfully performed at 300°C of reaction temperature, for 5min of reaction time, 200ml/min of flow rate, 0.33Nm3/h of O2 gas and at 13MPa of pressure in the reactor. The decomposition rate, which was similar to that for the autoclave, was obtained by the continuous apparatus.View full abstractDownload PDF (4331K) -
Apparatus and its PerformanceYoshinori KAWAGOE, Hiroshi MORISHIMA, Yasuhisa SEO, Kenji IMOU1991 Volume 53 Issue 2 Pages 87-94
Published: 1991
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA modified gaseous components system for CA-storage using a gas separation membrane was designed, constructed and tested. The membrane has permeability of CO2, O2 and N2 in order. The distinctive feature of this system is the introduction of a gas circuit selecting concept with a set of membrane module to get a desired modified gaseous components. It was effective in decreasing CO2 content and increasing O2 content, but operation of N2 introduction to the chamber was left as future study. The method of controlling gaseous components in the chamber was shown.View full abstractDownload PDF (2043K) -
Effect of Temperature and Pressure on Developing of Oily Stained Cocoons in Vacuum DryingZhen Jie WANG, Yasuhisa SEO, Hiroshi MORISHIMA, Shigeru KAWANA1991 Volume 53 Issue 2 Pages 95-98
Published: 1991
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (623K) -
Yoshiichi OKADA, Katsumi ISHIKAWA, Masateru NAGATA1991 Volume 53 Issue 2 Pages 99-104
Published: 1991
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (3193K) -
H. HORIE1991 Volume 53 Issue 2 Pages 105-109
Published: 1991
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (2126K)
- |<
- <
- 1
- >
- >|