Papers by Keyword: Tennis

Abstract: Interdisciplinary studies led to the development of high performances in sports. The Evaluation of those performances by the use of specific devices and the adjusted training on them that facilitates external feedback in real time represent one of the newest research and work-out methods. Our study aims at explaining the role of neuromuscular control, which is considered a key factor regarding the development of psycho-motor skills in tennis players. The study was conducted on 48 athletes who are all members of the national junior team. We used a conditions simulator for sports in an inertial-dissipative environment to measure neuromuscular control. The score of each sportsmen obtained from testing them in the simulator were associated with his/her learning ability of the task, in function of the national ranking, the level of coordination (by applying the tapping and tracing tests), the age and the gender. There was no relation between the neuromuscular control and the level of learning, the latter being associated with the level of coordination, influenced by the age and the gender of the player. Moreover, no significant differences were found when taking the dominance of laterality into account. Against our expectations, tennis players ranking at national level between 5 and 8 achieved higher scores in the simulator test than those placed from 1 to 4. We conclude that the neuromuscular control is not influenced by the ability to learn, but it favors the development of psycho-motor skills in tennis players, without explaining the high performances in young players of the national team.

Abstract: This paper is the discussion and analysis of first serve for the ATP champions tour Chengdu open contestant called Carlos Moya who was the grand slam champion of French open and Thomas Enqvist who was the champion of ATP World Tour Masters 1000,and to find out some regular patterns and features,to demonstrate the principle of kinematics of tennis, aimed at providing some methods for tennis athletes’ training and competition in the future,as well as make some statistics for the coaches to guide the tennis players in the serve tactics. In today's era of tennis serve for high speed development, the elite tennis players are more than 193 km per hour, and a top speed of 251 km of ACES to show us the charm of the tennis serve.Serve is the main means of scoring to win the match, especially the first serve,is offensive weapons,the quality of first serve directly influences of the set of serve for player,high quality of first serve make difficult for opponent from the start,at the same time,they can score initiative by first service,and is a prerequisite to win the set of serve.Therefore,it is the start of the game and the start of attack.The quality of first serve is the key factor of the game.

Abstract: In many sports, tennis occupies an important position. For a tennis player, it is an important factor in a good pair of tennis to win the game. The composite materials in the production process in tennis racket are studies in this paper. Analyzed and demonstrated several ways from its function and structure, process performance, process and process analysis. Finally, the production process of the racket will be detailed study, and then a conclusion will be get that is composite material has important practical value in the production of a tennis racket.

Abstract: The research on an impact between a tennis ball and racket is very significant to improve the level of tennis and reduce the sports injuries. A preliminary study on an impact between a tennis ball and racket is carried out in this paper. It is composed of four parts: the reference of the existed dynamic model, the experimental set-up, the test system, the collection and analysis of experimental data. The preliminary experimental results are compared with the dynamic model, and the impact dynamic model can be improved after considering every effect on the impact. The preliminary results show that the model can be used to predict the tennis impact on the racket with different inbound velocity.

Abstract: This paper presented a simple laser measuring method for measuring small displacement of a thin plastic string. The laser measuring method is based on the deviation of laser energy method. This measuring system consists of a laser diode and a photodetector. A photodetector received the laser beam from the laser diode is used to detect the laser energy deviation. A straight thin plastic string is placed between the laser diode and the photodetector to cover half area of the photodetector. When the string moves into or out the photodetector, the amount of the laser energy will change proportionally to the displacement of the string. A plastic string for the tennis is tested in this paper. The relation between the displacement of a plastic string and deviation of laser energy is verified by using a linear moving stage and a laser interferometer. The result showed the correlation is obtained. Thus, the displacement of a plastic string can be measured using the proposed laser measuring system.

Abstract: The tennis ball adhesive formula is optimized by studying the impact of reinforcing system, tackifier, vulcanization system and solvent on the performance of NR-based tennis ball adhesive. The optimizing formula of rubber is: NR 100, Carbon Black N220 30, ZnO 8.3, Stearic Acid 2.2, Phenolic Tackifying Resin 3, Sulfur 3, Accelerator D0.5.The adhesive made through such optimizing formula shows good performance and the finished tennis ball has excellent adhesion and air tightness, satisfying the design requirements.

Abstract: High-elasticity and high-modulus tennis rubber was manufactured mainly from NR and trans-1, 4-polyisoprene. The optimizing formula of rubber is: NR 82, TPI 18, Silica White 25, ZnO 10, Stearic Acid 1.5, Magnesium Carbonate 10, Antioxidant 1.5, Coupling Agent Si-693, Sulfur 4.5, Accelerator DM0.7, Accelerator D0.5. The tennis made of such optimized rubber can satisfy the industry standards.

Abstract: Design of tennis transmitter design parameters, structure design, choice of institution, etc., the transmitter in accordance with the standards of the international tennis federation (ITF) to carry on the design. Design and institutional selection includes the realization of the crank connecting rod mechanism and control motor sports, ball tray and ball under the control of the speed of tennis, crowded ball wheel speed regulating motor selection, crowded round ball structure design and checking calculation, the design and checking calculation of shaft, casing and bracket material design and the selection, selection of walking wheel, etc.

Abstract: High speed torque is very important in tennis batting process , this paper discusses the shoulder and torso rotation torque generated by the weight of tennis sports influence. Taking 48 tennis players as research objects, the rotation torque of professional tennis players are relatively outstanding with performance value,so we concluded that in the case of keeping the torso erect and through the process optimization of the rotation, we could combined shoulder movement and body bottom-up movement. These results suggested that some given hitting model can not only increase the performance of the tennis player on the pitch, but also reduce the risk of causing excessive damage.

Abstract: Tennis is being loved by more and more people now. Moreover, it is gradually becoming an important leisure and recreation activity. As for this, material features involved with tennis design is currently widely studied and noticed by scholars domestic and overseas. Based on the positive results obtained by researchers domestic and overseas, the paper further summarized and generalized the development process of tennis racket frame and the material features of tennis racket string. Besides, the technical process of tennis racket design is also analyzed. Eventually, by integrating the pressure carrying feature of tennis racket, by taking carbon fiber tennis racket as the example, the paper has calculated related mechanical indexes, so as to high-lighten its excellent performance. In addition, racket string also has significant influence on ball speed and accuracy rate. By looking up related literatures, the intrinsic relationship is also revealed.