随着我国载人航天的实现，失重是宇航员必然面临的问题。利用浸水技术模拟中性浮力平衡是当前国际上采用的一种比较先进的模拟失重的方法。当受试者在水下所受的重力与浮力相等时，受试者就会产生一种随遇平衡的飘浮感，其感受相当于在太空失重环境下活动，最大限度体会在太空工作的感觉从而锻炼其在太空工作的能力。本研究通过理论分析找出受试者在水下处于中性浮力平衡状态的配重方案，并考虑水下试验器材牵引的影响，对其进行配浮。在水下模拟失重试验中，实施配重与配浮方案，通过2个摄像头组成的水下摄像系统拍摄受试者在水下运动状态，使用艾里尔图像处理软件进行解析，得到受试者在各种水下试验条件下描述运动状态的数据。结果表明：受试对象处于中性浮力平衡状态后，身体某个部位受到外力，在力的方向上产生比较大的漂移，且伴有一定的偏转；受试对象在配重位置、大小均不同的条件下，下肢、腹部的配重多一些容易恢复平衡；部分肢体的屈伸运动对整个身体的变化是不同的，与肢体运动形式和参与运动的部位有关，膝关节或肩关节屈导致整个身体上升，而膝关节或肩关节伸则整个身体却下降，当膝关节和肩关节同时屈整个身体是上升的，而同时伸则整个身体是下降的。试验结果证实理论分析的配重与配浮的方案是切实可行的，得出影响人体在水下平衡状态的因素对今后的研究及宇航员的训练都有一定的指导作用。

Along with the realization that our country carries person's aerospace, lose heavy is the problem that the pilot faces by all means. The exploitation soak in water the technique emulation neutral buoyancy balance is current international last adoption of a kind of compare the forerunner of emulation lose the heavy method. When test-receiver gravity and buoyancies be subjected to in the underwater are equal, the test-receiver will produce a kind of with meet the float of balance to float the feeling, it feel equal to lose the heavy environment in the space under the activity, the biggest limit realizes the felling that works in the space thus it is in the ability that the space work. This research passes the theories analysis to find out the test-receiver to be placed in the neutral buoyancy equilibrium to go together with the heavy project in the underwater, and consider underwater experiment the influence that device lead, as to it's exert float. In underwater imitate lose heavily experiment, the implement go together with heavy with go together with to float the project, pass 2 shoot to be like a to constitute of underwater shoot to be like the system to take the test-receiver to exercise in the underwater appearance, the usage of ARIEL picture processing software carry on the resolution, get the test-receiver describes to exercise under the condition of various underwater experiment appearance of data.The result enunciation: After being subjected to be placed in the neutral buoyancy equilibrium, a certain part of body is subjected to the outside dint, with the bigger drift on the direction creation of the dint, and the companion with certainly deflect; Be subjected to try the object under the condition of exert weight position, with size all differently, the legs and belly goes together with a little bit much more heavy easy instauration balance; Parts of bodies bend to stretch the sport different to the whole variety of body, exercise with the body form and participate the athletic part relevant, the knee joint or the shoulder joints bend to cause the whole body rise, but the knee joint or the shoulder joints stretch then the whole body but descend, the knee joint and the shoulder joints to bend at the same time the whole body is rise, but stretch at the same time then the whole body is descend.The result of experiment confirmation theories to exert weight and exert float of project is to slice actually viable, gain an influence factor of human body in the research to aftertime of all underwater equilibrium and pilot of training have some function.