Study on Throw Accuracy for Baseball Pitching Machine with Roller (Study of Seam of Ball and Roller) Shinobu SAKAI*5, Juhachi ODA, Kengo KAWATA and Yu

Similar documents
A Study on Throw Simulation for Baseball Pitching Machine with Rollers and Its Optimization Shinobu SAKAI*5, Yuichiro KITAGAWA, Ryo KANAI and Juhachi

Study on Application of the cos a Method to Neutron Stress Measurement Toshihiko SASAKI*3 and Yukio HIROSE Department of Materials Science and Enginee

Instability of Aerostatic Journal Bearings with Porous Floating Bush at High Speeds Masaaki MIYATAKE *4, Shigeka YOSHIMOTO, Tomoaki CHIBA and Akira CH

第６２巻　第１号　平成２４年４月／石こうを用いた木材ペレット

Optical Lenses CCD Camera Laser Sheet Wind Turbine with med Diffuser Pitot Tube PC Fig.1 Experimental facility. Transparent Diffuser Double Pulsed Nd:

A Study of Effective Application of CG Multimedia Contents for Help of Understandings of the Working Principles of the Internal Combustion Engine (The

Synthesis and Development of Electric Active Stabilizer Suspension System Shuuichi BUMA*6, Yasuhiro OOKUMA, Akiya TANEDA, Katsumi SUZUKI, Jae-Sung CHO

Table 1. Reluctance equalization design. Fig. 2. Voltage vector of LSynRM. Fig. 4. Analytical model. Table 2. Specifications of analytical models. Fig

The Evaluation of LBB Behavior and Crack Opening Displacement on Statically Indeterminate Piping System Subjected to Monotonic Load The plastic collap

Fig. 2 Signal plane divided into cell of DWT Fig. 1 Schematic diagram for the monitoring system

Fig. 1 KAMOME50-2 Table 1 Principal dimensions Fig.2 Configuration of the hydrofoils (Endurance and sprint foil) Fig. 3 Schematic view of the vortex l

Fig. 4. Configuration of fatigue test specimen. Table I. Mechanical property of test materials. Table II. Full scale fatigue test conditions and test

JFE.dvi


Stress Singularity Analysis at an Interfacial Corner Between Anisotropic Bimaterials Under Thermal Stress Yoshiaki NOMURA, Toru IKEDA*4 and Noriyuki M

The Evaluation on Impact Strength of Structural Elements by Means of Drop Weight Test Elastic Response and Elastic Limit by Hiroshi Maenaka, Member Sh

Mikio Yamamoto: Dynamical Measurement of the E-effect in Iron-Cobalt Alloys. The AE-effect (change in Young's modulus of elasticity with magnetization


Studies of Foot Form for Footwear Design (Part 9) : Characteristics of the Foot Form of Young and Elder Women Based on their Sizes of Ball Joint Girth

2 10 The Bulletin of Meiji University of Integrative Medicine 1,2 II 1 Web PubMed elbow pain baseball elbow little leaguer s elbow acupun

Fig. 1 Schematic construction of a PWS vehicle Fig. 2 Main power circuit of an inverter system for two motors drive

1 Fig. 1 Extraction of motion,.,,, 4,,, 3., 1, 2. 2.,. CHLAC,. 2.1,. (256 ).,., CHLAC. CHLAC, HLAC. 2.3 (HLAC ) r,.,. HLAC. N. 2 HLAC Fig. 2

A Higher Weissenberg Number Analysis of Die-swell Flow of Viscoelastic Fluids Using a Decoupled Finite Element Method Iwata, Shuichi * 1/Aragaki, Tsut

A2, Vol. 69, No. 2 Vol. 16, I_237-I_246, Analytical Investigation of Shear Force Distribution of Perfobond Strip with Plural Perforations * ** *

０８０１２９７，繊維学会ファイバ１１月号／報文－０１－青山

Web Stamps 96 KJ Stamps Web Vol 8, No 1, 2004

1..FEM FEM 3. 4.

０８０１３９１，繊維学会ファイバ１２月号／報文－０１－西川

０１３８５８，繊維学会誌ファイバー１月／報文－０２－古金谷

Steel Construction Vol. 6 No. 22(June 1999) Engineering

Fig. 3 Coordinate system and notation Fig. 1 The hydrodynamic force and wave measured system Fig. 2 Apparatus of model testing

(MIRU2008) HOG Histograms of Oriented Gradients (HOG)

Fig. 1. Schematic drawing of testing system. 71 ( 1 )

Fig.l Music score for ensemble Fig.Z Definition of each indicator Table I Correlation coefficient between hitting lag variation /,(n) and hitting cycl

Fig. 3 Flow diagram of image processing. Black rectangle in the photo indicates the processing area (128 x 32 pixels).

Tetsu-to-Hagane Vol. 87 (2001) No. 5 Table 1. Physical properties of particles. (a) side view (b) front view Fig. 1. Experimental apparatus with semic

日立金属技報　Vol.34

Flow Around a Circular Cylinder with Tangential Blowing near a Plane Boundary (2nd Report, A Study on Unsteady Characteristics) Shimpei OKAYASU, Kotar

Fig. 1 Sampling positions from the ingot. Table 2 Chemical compositions of base metal (%) Fig. 2 (unit: mm) Shape and size of fatigue test specimen. T

Continuous Cooling Transformation Diagrams for Welding of Mn-Si Type 2H Steels. Harujiro Sekiguchi and Michio Inagaki Synopsis: The authors performed

電子部品はんだ接合部の熱疲労寿命解析

SICE東北支部研究集会資料(2012年)

国土技術政策総合研究所　研究資料

Visual Evaluation of Polka-dot Patterns Yoojin LEE and Nobuko NARUSE * Granduate School of Bunka Women's University, and * Faculty of Fashion Science,

* Meso- -scale Features of the Tokai Heavy Rainfall in September 2000 Shin-ichi SUZUKI Disaster Prevention Research Group, National R

EQUIVALENT TRANSFORMATION TECHNIQUE FOR ISLANDING DETECTION METHODS OF SYNCHRONOUS GENERATOR -REACTIVE POWER PERTURBATION METHODS USING AVR OR SVC- Ju


Developement of Plastic Collocation Method Extension of Plastic Node Method by Yukio Ueda, Member Masahiko Fujikubo, Member Masahiro Miura, Member Sum

untitled

Key Words: wavelet transform, wavelet cross correlation function, wavelet F-K spectrum, 3D-FEM

weak ferromagnetism observed on Shimotokuyama and Ayumikotan natural crystals behaves as pre dicted by Dzyaloshinsky and Moriya, while Wagasennin and

IPSJ SIG Technical Report Vol.2016-CE-137 No /12/ e β /α α β β / α A judgment method of difficulty of task for a learner using simple

149 (Newell [5]) Newell [5], [1], [1], [11] Li,Ryu, and Song [2], [11] Li,Ryu, and Song [2], [1] 1) 2) ( ) ( ) 3) T : 2 a : 3 a 1 :

2 94

IPSJ SIG Technical Report Vol.2012-CG-148 No /8/29 3DCG 1,a) On rigid body animation taking into account the 3D computer graphics came

I

dvi


Fig, 1. Waveform of the short-circuit current peculiar to a metal. Fig. 2. Waveform of arc short-circuit current. 398 T. IEE Japan, Vol. 113-B, No. 4,

(43) Vol.33, No.6(1977) T-239 MUTUAL DIFFUSION AND CHANGE OF THE FINE STRUCTURE OF WET SPUN ANTI-PILLING ACRYLIC FIBER DURING COAGULATION, DRAWING AND

Hansen 1 2, Skinner 5, Augustinus 6, Harvey 7 Windle 8 Pels 9 1 Skinner 5 Augustinus 6 Pels 9 NL Harvey ML 11 NL

(1) 2

Computer Simulation in Thermoplastic Injection Molding Takaaki Matsuoka Toyota Central Research and Development Laboratories, Inc. 41-1, Yokomichi, Na


XFEL/SPring-8

A Navigation Algorithm for Avoidance of Moving and Stationary Obstacles for Mobile Robot Masaaki TOMITA*3 and Motoji YAMAMOTO Department of Production

06_学術_関節単純X線画像における_1c_梅木様.indd

MmUm+FopX m Mm+Mop F-Mm(Fop-Mopum)M m+mop MSuS+FX S M S+MOb Fs-Ms(Mobus-Fex)M s+mob Fig. 1 Particle model of single degree of freedom master/ slave sy

Present Situation and Problems on Aseismic Design of Pile Foundation By H. Hokugo, F. Ohsugi, A. Omika, S. Nomura, Y. Fukuda Concrete Journal, Vol. 29

..,,,, , ( ) 3.,., 3.,., 500, 233.,, 3,,.,, i

258 5) GPS 1 GPS 6) GPS DP 7) 8) 10) GPS GPS ) GPS Global Positioning System

Rhythmic Gymnastics RG 3) 2 GymnastikTurnen ) ) 1963 Modern Gymnastics FIG 10 Modern Rhythmic Gymnastics 1977 Modern Rhythmic S

Journal of Textile Engineering, Vol.53, No.5, pp

16_.....E...._.I.v2006

Fig. 1 Hydrostatic Thrust Bearing Fig. 2 Point loading of elastic half-space

レーザ誘起蛍光法( LIF法) によるピストンの油膜挙動の解析

3_23.dvi

A Feasibility Study of Direct-Mapping-Type Parallel Processing Method to Solve Linear Equations in Load Flow Calculations Hiroaki Inayoshi, Non-member

<95DB8C9288E397C389C88A E696E6462>

622 3) 4 6) ) 8) , ,921 40, ) ) 10 11) ) ) ,434 43, ,18

1: A/B/C/D Fig. 1 Modeling Based on Difference in Agitation Method artisoc[7] A D 2017 Information Processing

29 Short-time prediction of time series data for binary option trade

(1 ) (2 ) Table 1. Details of each bar group sheared simultaneously (major shearing unit). 208

Study of the "Vortex of Naruto" through multilevel remote sensing. Abstract Hydrodynamic characteristics of the "Vortex of Naruto" were investigated b

Q [4] 2. [3] [5] ϵ- Q Q CO CO [4] Q Q [1] i = X ln n i + C (1) n i i n n i i i n i = n X i i C exploration exploitation [4] Q Q Q ϵ 1 ϵ 3. [3] [5] [4]

The copyright of this material is retained by the Information Processing Society of Japan (IPSJ). The material has been made available on the website

Journal of Geography 116 (6) Configuration of Rapid Digital Mapping System Using Tablet PC and its Application to Obtaining Ground Truth

1 Web [2] Web [3] [4] [5], [6] [7] [8] S.W. [9] 3. MeetingShelf Web MeetingShelf MeetingShelf (1) (2) (3) (4) (5) Web MeetingShelf

alternating current component and two transient components. Both transient components are direct currents at starting of the motor and are sinusoidal

THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS TECHNICAL REPORT OF IEICE.

) ,

a) Extraction of Similarities and Differences in Human Behavior Using Singular Value Decomposition Kenichi MISHIMA, Sayaka KANATA, Hiroaki NAKANISHI a

Table 1. Assumed performance of a water electrol ysis plant. Fig. 1. Structure of a proposed power generation system utilizing waste heat from factori

5D1 SY0004/14/ SICE 1, 2 Dynamically Consistent Motion Design of Humanoid Robots even at the Limit of Kinematics Kenya TANAKA 1 and Tomo

Table 1 Experimental conditions Fig. 1 Belt sanded surface model Table 2 Factor loadings of final varimax criterion 5 6

DOUSHISYA-sports_R12339(高解像度).pdf

Estimation of Photovoltaic Module Temperature Rise Motonobu Yukawa, Member, Masahisa Asaoka, Non-member (Mitsubishi Electric Corp.) Keigi Takahara, Me

原稿.indd

01-譴ｶ蜴・-8.fm


Transcription:

Study on Throw Accuracy for Baseball Pitching Machine with Roller (Study of Seam of Ball and Roller) Shinobu SAKAI*5, Juhachi ODA, Kengo KAWATA and Yuichiro KITAGAWA Department of Human and Mechanical Systems Engineering, Kanazawa University, Kakuma-machi, Kanazawa-shi, Ishikawa, 920-1192 Japan The most common commercial pitching machines for baseball are the "roller" type and the "arm" type. Pitches such as the fastball, curveball and screwball are easily achieved by the pitching machine with three rollers which were developed by the authors. In this study, the moving behavior and contact stress state of the ball pitched with the three rollers type pitching machine is analyzed using dynamic finite element analysis software (ANSYS/LS-DYNA). The effect of a seam of a baseball to the throw accuracy is analyzed numerically. In the analysis, the finite element models of a detailed baseball with a seam and a pitching machine with three rollers are used. Additionally, the initial velocity and the spin rate of the pitched ball are filmed using a high-speed videograph, and those pictures are compared with the finite element analysis. From the analytical results, it is understood that the coefficient of friction between the baseball and the rollers is not affected. Additionally, it is obvious that the ball's velocity and spin rate are relatively unaffected by the seam orientation, while the throw's horizontal and vertical angles are notably affected by the relative angular velocity of the rollers and the orientation of the seam. Key Words : Baseball, Finite Element Method, Pitching Machine, Motion Control, Experimental Mechanics, Simulation E-mail : sakai@t.kanazawa-u.ac.jp

Fig.2 Fig.1 Three rollers type pitching machine Finite element models of baseball and three rubber rollers (15 104 elements) Fig. 3 Viscoelastic model by three elements model

Table 1 Material properties of rubber tire and baseball Table 2 Analytical conditions (a) Case 1 (No-spin ball) (b) Case 2 (Fast ball) Fig. 4 Mises stress distribution in X-Y cross section (a) Case 1 (No-spin ball) (b) Case 2 (Fast ball) Fig. 5 Shear stress distribution of X-Y direction Fig.6 Time history of linear velocity of X-direction for pitched fast ball

Fig.7 Behavior of the ball using finite element analytical results in Case 2 (Fast ball, V= 25.1 m/s) Fig.8 Behavior of the ball using high-speed videography in Case 2 (Fast ball, V = 24.2 m/s) Fig.9 Comparison of ball's velocity by experimental and analytical values Fig.10 Comparison of ball's spin rate by experimental and analytical values Fig.11 Comparison of vertical angle 0 of pitched ball by experimental and analytical values

Fig.12 Time history of velocity of ball in Case 2 Fig.13 Comparison of vertical angle for pitched ball Fig.14 Comparison of horizontal angle for pitched ball (a) Ball and three rollers (b) Close-up view Fig. 15 Radius of each roller distance, R

Fig.16 Time history of velocity of pitched ball in Case 2 Fig.18 Relation of vertical angle ľ and radius R Fig.17 Time history of minimum principal stress at point A in Case 2 Fig.19 Relation of horizontal angle ė and radius R (1) Mish, S.P. and Hubbard, M., Design of a Full Degree-of-freedom Baseball Pitching Machine, Journal of Sports Engineering, Vol.4, No.3 (2001), pp.123-133. (2) Oda, J., Sakai, S., Yonemura, S., Kawata, K., Horikawa, S. and Yamamoto, H., Development Research of Pitching Machine Controlling Variable Ball using Neural Network, Transactions of the Japan Society of Mechanical Engineers, Series C, Vol.71, No.702 (2005), pp. 201-206. (3) Sakai, S., Oda, J. and Kitagawa, Y., An Effect of a Baseball having Seam under Roller type Pitching Machine, Proceedings of the Joint Symposium on Sports Engineering and Human Dynamics Conference, No.06-35 (2006-11), pp. 120-124. (4) Nicholls, R.L., Miller, K. and Elliott, B.C., Modeling Deformation Behavior of the Baseball, Journal of Applied Biomechanics, Vol.21, No.1 (2004), pp. 9-15. (5) Oda, J., Sakai, S., Yonemura, S. and Kawata, K., Research of Impact Force of the Baseball and its Damage Effect to Living Body, Proceedings of the 42th Hokuriku-Shinetsu Branch Regular Meeting of the Japan Society of Mechanical Engineers, No.047-1 (2005-3), pp. 205-206.

2024 © docsplayer.net プライバシー | 利用規約 | フィードバック