Research on Balance Control of Freestyle Skiing Aerial Skills Based on Ant Colony Algorithm
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Hindawi Security and Communication Networks Volume 2021, Article ID 4503358, 10 pages https://doi.org/10.1155/2021/4503358 Research Article Research on Balance Control of Freestyle Skiing Aerial Skills Based on Ant Colony Algorithm Wang Jun, Wenli Song , and Zhipeng Li Harbin Sport University, Harbin, Heilongjiang 150008, China Correspondence should be addressed to Wenli Song; [email protected] Received 15 June 2021; Revised 14 July 2021; Accepted 23 July 2021; Published 10 August 2021 Academic Editor: Chi-Hua Chen Copyright © 2021 Wang Jun et al. *is is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Aiming at solving the problem of poor performance of airborne freestyle skiing balance, this paper presents the research of airborne freestyle skiing balance control based on ant colony algorithm. On the basis of defining the trajectory division of the airborne balance of freestyle skiing and the track of the center of gravity of the human body, a sensor is used to collect the data of the airborne balance of freestyle skiing, and the moving average, denoising, and normalizing processes are done. *e training label of the ant colony algorithm is made by the analog signal matrix, the implementation foreground of the key posture frame of freestyle skiing is extracted, the disturbed area in the key posture frame is removed by the clustering algorithm, and the key posture area of freestyle skiing is obtained. *e incremental clustering of the data of the key posture area of freestyle skiing is conducted, the incremental posture data mining model of freestyle skiing is established, the mining parameters are input into the mining model, and the incremental data mining is realized by the ant colony algorithm to complete the research on the control of the airborne balance of freestyle skiing. *e results show that the proposed method has good reliability, good convergence, and strong response ability. 1. Introduction turning body and the large lateral drift of the movements in the stage of air movement and the failure of the landing *e gradual rise of winter sports will further accelerate the movement such as the left- and right-side slip and the back development of international ice and snow events and the touching the snow in the stage of landing will cause serious improvement of competitive results. However, air skill is a injury to the knee joint or waist [2]. high-risk event, a perfect combination of somersault and In recent years, more and more researchers have paid skiing. *e sport requires “stable, high, accurate, and attention to the balance control ability of different pop- beautiful.” *is is a sport with strong technicality, strong ulations. Balance control, also known as posture stability, is appreciation, and strong artistic quality [1]. Athletes are the ability to control the relationship between the body’s required to complete skiing, take-off, take-off, take-off, center of gravity and the support surface. It is mainly affected somersault, and turn in a very short period of time, and by vision, proprioception, vestibular function, and muscle finally stand smoothly on the 38° landing slope and delimit. strength of each link. In reference [3], gender differences in *e athletes are required to have strong balance control balance control in classic international cross-country skiing ability because each technical link can lead to action failure competitions are presented to compare the speed, skill se- or even cause injury. A poor balance control ability of the lection, and time patterns of world-class male and female athletes will cause them to deviate from the jumping plat- cross-country skiers and to explore the combined impact of form in the stage of skiing assistance. *e inability to reach gender and speed on subskill selection. In reference [4], it is the best launching angle in the stage of taking off will cause suggested that freestyle skiing should have a sense of balance insufficiency of the height and distance of the take-off as well and control, which highlights the social dimension of ad- as insufficiency of the somersault. *e instability of the venture by examining the values of freestyle skiing culture. 2 Security and Communication Networks Studies have shown that the mechanism of balance control the center of gravity of the human body, a sensor is involves sensory input, central integration, and motor used to collect the data of the airborne balance of control. *e stability and directionality require complex freestyle skiing, and the moving average, denoising, interactions between the musculoskeletal system and the and normalizing processes are done. nervous system. Musculoskeletal components include joint (3) *e results show that the proposed method has good ROM, spinal flexibility, muscular properties, and biome- reliability, good convergence, and strong response chanical relationships at the body stage. *ey can be divided ability into two types: static maintenance of fixed posture and dynamic adjustment and maintenance of posture control. *e remainder of this paper is organized as follows. *e dynamic state is divided into two types: automatic state Section 2 introduces the freestyle skiing skill movement data (the ability to regain the stable state by performing various acquisition and preprocessing based on ant colony algo- autonomous movements without an external force) and rithm. Section 3 discusses the freestyle skiing airborne skill other dynamic state (the ability to recover the stable state balance key attitude data incremental control algorithm and when disturbed by an external force). In the technical link of database design of management information system. Section aerial skill project, when the direction of ground reaction 4 discusses experiment and analysis. Section 5 presents the force is constant, static balance control plays a leading role; conclusions of the study. when the direction of supporting reaction force changes, dynamic balance plays a leading role. Athletes need to have 2. Freestyle Skiing Skill Movement Data high static and dynamic balance control ability. In the skiing Acquisition and Preprocessing Based on Ant stage, athletes are required to have good static balance to Colony Algorithm maintain a fixed posture, achieve greater speed, and enter the transition area and the take-off platform in a precise di- 2.1. Instruction and Collection of Aerial Skill in Freestyle rection. When the speed of reaching the transition area is too Skiing. Freestyle skiing is a high-speed slalom on snow large or too small, athletes also need to have high automatic where skiers ski downhill a mountain at a high speed using balance ability to adjust. Balance control of freestyle skiing tools such as poles and skis and can ski at will [5]. *e key to aerial skills is important in airborne freestyle skiing balance. freestyle skiing is the control of balance in the air, which In other words, the airborne freestyle skiing balance has a requires the athlete to turn around on the prescribed track in number of effects that can be effectively addressed by balance the shortest time. Usually, for the same flag gate number, control of freestyle skiing. It also has an important impact on athletes should circle the flag gate and slide fast on the same security and communication networks. line. *e closer the athlete’s center of gravity moves along the At the take-off stage of the platform, athletes are required line, the better the performance [6]. to maintain a static fixed posture to achieve rigid braking of Before analyzing the freestyle slewing technique, we first the whole body and take off with a certain position angle (the determine the relationship between the course of the skis angle between the body and the jumping head of the plat- and the track of the athlete’s center of gravity, as shown in form) to achieve the height and distance of the air movement. Figure 1. A large position angle will cause the height deficiency and the *is trajectory plotting method accords with the actual speed of the somersault to be larger, which will eventually lead situation (Figure 2). As can be seen from Figure 2, this to landing backstroke, and a small position angle will cause project mainly interprets the “S” curve of a continuous turn the distance deficiency and the speed of the somersault to be by the human body before turning back to left and right. smaller, which will lead to landing forward roll; forward roll is *e core of freestyle skiing is the slewing technique. also an important factor causing injury. *erefore, a research Usually in a turning, arc is divided into the preparation on the balance control of airborne freestyle skiing skills based stage, the beginning into the arc stage, the rotation stage, and on ant colony algorithm is proposed. *e airborne somersault the completion of the turning stage. *e movements of these is required to maintain the static stability of the body. In the four stages are technically interrelated [7]. First, the height of instant standing phase before landing, the static balance of the the body’s center of gravity goes from low to high and then fixed limb posture is mainly maintained, while in the high- to low again, with the lowest posture at the time of pole speed gliding phase after landing, the static and dynamic extension and the highest point at the moment of passing balance is required. *erefore, the static and dynamic balance through the fall line. Second, the center of gravity first moves control ability of the athlete is an important factor affecting forward gradually from the beginning stage to the gliding the performance. stage and to the middle stage and then moves back a little *e research contributions of this article include the from the middle position to the completion of the turn.