中国体育科技
中國體育科技
중국체육과기
China Sport Science and Technology
2014年
1期
125~128
,共null页
蔡睿 陈亮 何申杰 江崇民 李然 刘智
蔡睿 陳亮 何申傑 江崇民 李然 劉智
채예 진량 하신걸 강숭민 리연 류지
健身车 公路自行车 动力学 模型 仿真
健身車 公路自行車 動力學 模型 倣真
건신차 공로자행차 동역학 모형 방진
exercise bike ; road cycling dynamics model simulation
自行车骑行是一个受重力、地面支撑力、空气阻力、地面摩擦力等多种力综合作用的过程,而在户外骑行公路自行车因风速和骑行路面的变化受力过程更为复杂。健身车如何在骑行过程中做到现实场景的真实感,不仅需要在视觉上进行表现,更重要的是实现健身车骑行的负荷与实地骑行感觉的一致性。在力学分析的基础上,建立公路自行车骑行过程的动力学数学模型,通过模型求解,分析不同骑行状态下的特征与规律。仿真结果显示,在相对平缓路面上骑行时,速度应保持在12m/s左右;在通过连续起伏路段时,若距离较短可加快骑行速度,若距离较长应降低骑行速度;在以额定功率上坡和下坡骑行时,倾斜度较小的上坡路段和倾斜角度较大的下坡路段对速度影响不大;全力冲刺200m可达到速度的峰值,而200~250m是完成冲刺阶段的最佳距离。该组参数将运用于健身车样车的控制系统。
自行車騎行是一箇受重力、地麵支撐力、空氣阻力、地麵摩抆力等多種力綜閤作用的過程,而在戶外騎行公路自行車因風速和騎行路麵的變化受力過程更為複雜。健身車如何在騎行過程中做到現實場景的真實感,不僅需要在視覺上進行錶現,更重要的是實現健身車騎行的負荷與實地騎行感覺的一緻性。在力學分析的基礎上,建立公路自行車騎行過程的動力學數學模型,通過模型求解,分析不同騎行狀態下的特徵與規律。倣真結果顯示,在相對平緩路麵上騎行時,速度應保持在12m/s左右;在通過連續起伏路段時,若距離較短可加快騎行速度,若距離較長應降低騎行速度;在以額定功率上坡和下坡騎行時,傾斜度較小的上坡路段和傾斜角度較大的下坡路段對速度影響不大;全力遲刺200m可達到速度的峰值,而200~250m是完成遲刺階段的最佳距離。該組參數將運用于健身車樣車的控製繫統。
자행차기행시일개수중력、지면지탱력、공기조력、지면마찰력등다충력종합작용적과정,이재호외기행공로자행차인풍속화기행로면적변화수력과정경위복잡。건신차여하재기행과정중주도현실장경적진실감,불부수요재시각상진행표현,경중요적시실현건신차기행적부하여실지기행감각적일치성。재역학분석적기출상,건립공로자행차기행과정적동역학수학모형,통과모형구해,분석불동기행상태하적특정여규률。방진결과현시,재상대평완로면상기행시,속도응보지재12m/s좌우;재통과련속기복로단시,약거리교단가가쾌기행속도,약거리교장응강저기행속도;재이액정공솔상파화하파기행시,경사도교소적상파로단화경사각도교대적하파로단대속도영향불대;전력충자200m가체도속도적봉치,이200~250m시완성충자계단적최가거리。해조삼수장운용우건신차양차적공제계통。
Cycling is an integrated effect process of several physical forces including gravity, support force, air resistance and ground friction. For the changes of air speed and riding road, the stress processes of outdoors road cycling are more complex. In the process of riding, how to provide realistic scenes like the real scene, not only in the visual, but also to achieve the con- sistency of exercise bicycle riding load and actual riding feeling is more important. Based on the analysis of the stress, the research constructed the mathematical model of cycling process of road bicycle and studied the features and laws under different riding conditions by solving the model. The findings are as follows: firstly, speed should be maintained at around 12m/s in the relatively flat road riding;secondly, in the continuous rolling road, we can accelerate the riding speed if the distance is short, we should reduce the speed if it is longer~ thirdly, in rated power uphill and downhill riding, speed has little effect when there are the uphill section with smaller inclined angle and downhill section with larger inclined angle; lastly, spring 200m can reach speed peak, while the the best distance to the sprint stage is 200~250m. These parameters will be used for the control system of exercise bicycle.