Application of Computer Numerical Simulation in Movement Technique Research

Adopt the literature review method, apply the computer numerical simulation technology, and combine the research method and characteristics of the physical exercise technology. It discusses the application methods, process, specific steps and function of the computer numerical simulation technique from the establishment of the sport technique simulation model, steps, data input, and data pre-processing of the computer numerical simulation, computer numerical simulation calculation, modification of the movement technique proposal, application of the new action design and computer numerical simulation in the movement technique training, etc. In the physical exercise teaching and exercise training practice, it generally uses the camera to shoot the athletes’ skilled movement, and then analyzes it. However, this method only can simply replay the skilled movement of the athletes, while its quantization and comparative analysis on the kinematics, dynamics, and biology of the movement technique cannot achieve satisfactory result. The rapid development of the modern computer technology lays scientific foundation for the comparison, superposition, dynamics test and calculation of the movement technique image. Especially, the computer numerical simulation technique enables the coach to predict the result of the movement technique in the design phase of the movement technique and then proceed with the optimal design of the movement technique. No matter for the improvement of the movement technique or the reconstruction of the movement technique, it is feasible to greatly shorten the research period, and improve the feasibility and actual application value of the movement technique design proposal. Establishment of the Digital Simulation Model of the Human Motion The system simulation is a powerful tool for using the computer to analyze and design various complex systems. Its application and influence have been widely applied in many science researches, engineering domain and non-engineering domain. In the movement technique research, as the research is involved in the features of the human motion, the human body is generally simplified into a multiple rigid system mode according to the purpose of the movement technique, rules and features of the human to finish the movement technique. The skeleton, muscle, tendon, and other movement system tissue of the human body is processed into the acting force and torque among each rigid by, and then the kinematics and dynamics equation for studying the human motion is established. When the independent generalized coordinate is adopted to study the skilled movement, its mathematical model is an ordinary differential equation[1]. If the dependent generalized coordinate is adopted, the differential algebra equation will be achieved. These equations generally belong to higher-order and highly-coupled non-linear equation. Apart from simplifying and achieving the analysis results under tiny minority of the situations, the arithmetic solution can be achieved through the computer in general. International Conference on Advances in Mechanical Engineering and Industrial Informatics (AMEII 2015) © 2015. The authors Published by Atlantis Press 144 Methods and Procedure of the Computer Numerical Simulation 2.1 Methods of computer numerical simulation The methods for simulating the human movement through the computer include: input the original parameter, calculate, achieve the description result of the skilled movement, form the principle of the movement technique, etc. This process is named as numerical simulation. During the calculation, it is possible to face positive and reverse problems. For instance, get the mechanical conditions (e.g. muscle moment force, drag torque, human hypogene transmission and angular momentum transmission, exogenous process, etc.) that form the skilled movement when the movement status (e.g. space and time feature of the movement of each link) of each link of the human body is known. During the computing progress of the computer numerical simulation, it is necessary to increase the mechanics additional constraint conditions, so as to get the optimal combination of each input amount, and finish the optimal design of the movement technique. Under the condition of establishing accurate parameters of the numerical simulation model, the calculation result can accurately reflect the actual movement status, which has strong prediction and practical guidance effect for the results obtained by the research on the movement technique. Picture 1 working process diagram of the computer numerical simulation It puts forward the optimal movement technique proposal toward the throwing technique of Wilkinson. As this research is established on the basis of the scientific theory, it an provide scientific guidance for optimizing the movement technique of the athletes, which has great significance in improving the movement technique level[2]. 2.2 Procedure of the computer numerical simulation The procedure of the computer numerical simulation gets involved in different aspects. For instance, according to the researched movement technique subject, target and task, establish continuous movement digitalization model of the multiple rigid body system, establish the Multi rigid body model Calculation result Basic parameter