基于计算和实验的方法确定自主运动中时间问题的研究
发布时间：2019-04-10 14:45
【摘要】：人类无时无刻不在运动,每一次运动都会消耗一定的时间。但是大脑在自主运动之前是否知道运动时间这一问题一直未能被解答。不同的模型采用不同的假设。时间有限模型假设,在自主运动之前,大脑已经知道运动时间;时间无限模型假设,大脑不知道运动时间,时间是在运动之后自然呈现出来的。尽管两种相悖的模型都能在一定条件下拟合实验数据,但是这一时间问题却悬而未决。时间问题并没有办法直接回答。本研究才用了独特的办法,把时间问题转化成了空间问题,即比较对外界干扰的修复形状。本研究基于最优控制框架,对以上两种模型进行了数学公式上的对比。时间有限模型的控制增益为时变增益,时间无限模型的控制增益为时不变增益。不同的增益导致了,在遇到外界干扰时,对运动的修复轨迹不同。本研究针对这一差别,设计了不同范式的实验,进行了Matlab仿真。并用相同的参数进行了行为学实验,通过行为学实验结果解释这一科学问题。实验结果否定了时间无限理论在自主运动中的适用性,但是并不能完全支持时间有限理论。其中差别可能来自于参数的选择。
[Abstract]:Human beings exercise all the time, and each exercise consumes a certain amount of time. But the question of whether the brain knows when to exercise before it moves autonomously has not been answered. Different models adopt different assumptions. The time-limited model assumes that the brain already knows the movement time before the autonomous movement, and the time infinite model assumes that the brain does not know the movement time, and the time appears naturally after the exercise. Although the two contradictory models can fit the experimental data under certain conditions, the time problem is still unresolved. There is no direct answer to the question of time. In this study, a unique method was used to transform the time problem into a spatial problem, that is, to compare the repair shape of external interference. Based on the optimal control framework, the mathematical formulas of the two models are compared. The control gain of time-limited model is time-varying gain, and the control gain of time-infinite model is time-invariant gain. Different gain leads to different track of motion repair in the event of external interference. Aiming at this difference, experiments of different paradigms are designed, and Matlab simulation is carried out. The behavioral experiments were carried out with the same parameters, and the results of behavioral experiments were used to explain this scientific problem. The experimental results deny the applicability of time-infinite theory in autonomous motion, but can not fully support the time-limited theory. The difference may come from the choice of parameters.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP391.9
[Abstract]:Human beings exercise all the time, and each exercise consumes a certain amount of time. But the question of whether the brain knows when to exercise before it moves autonomously has not been answered. Different models adopt different assumptions. The time-limited model assumes that the brain already knows the movement time before the autonomous movement, and the time infinite model assumes that the brain does not know the movement time, and the time appears naturally after the exercise. Although the two contradictory models can fit the experimental data under certain conditions, the time problem is still unresolved. There is no direct answer to the question of time. In this study, a unique method was used to transform the time problem into a spatial problem, that is, to compare the repair shape of external interference. Based on the optimal control framework, the mathematical formulas of the two models are compared. The control gain of time-limited model is time-varying gain, and the control gain of time-infinite model is time-invariant gain. Different gain leads to different track of motion repair in the event of external interference. Aiming at this difference, experiments of different paradigms are designed, and Matlab simulation is carried out. The behavioral experiments were carried out with the same parameters, and the results of behavioral experiments were used to explain this scientific problem. The experimental results deny the applicability of time-infinite theory in autonomous motion, but can not fully support the time-limited theory. The difference may come from the choice of parameters.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP391.9
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