【作者】 张晓锋；

【导师】 宋荆洲；

【作者基本信息】 北京邮电大学 ， 机械制造及其自动化， 2013， 硕士

【摘要】 由于天地之间的距离非常遥远,导致了空间机器人遥操作系统中存在较大的天地间通讯时延,天地间大时延的存在,不仅会影响整个遥操作系统的稳定,还会使得操作者由于不能及时收到远端的信息,而产生疲惫感和极大的操作压力,因此,如何克服大时延的影响成为空间机器人遥操作系统需要解决的重要问题。双边控制由于其能应用于从端环境未知或者非结构化等一系列的优点,成为近几年遥操作系统中的研究重点与热点,而一般的双边控制遥操作都是将整个系统简化为二端口网络模型,虽然这种结构简单,且能满足一般性的遥操作任务性能,但是对于需要进行复杂精细的任务工作的时候,二通道结构则无法满足需求。于是针对力和运动均能双向传递的思想,研究者提出了四通道双边控制结构。在前人的基础上,本文主要完成了如下工作：首先,在对经典的四通道结构进行研究分析之后,设计了一种基于真实力反馈的四通道双边控制系统,根据控制器参数将其简称为KBG控制,此结构中考虑了主手施加的真实力对从端的影响,以及从端反馈力对主手的影响,并利用位置偏差进行了力校正。其次,对所设计的力反馈遥操作双边控制系统进行了性能分析。以往的研究者们主要只是分析系统的稳定性和透明性,本文给出了一个李亚普诺夫能量函数,利用无源性理论对系统进行了分析,得出整个系统无源的结论,进而可得系统稳定,随后又给出了透明性的度量函数。此外,针对从手对主手的跟踪能力,即系统的跟踪性,给出了系统跟踪性的度量函数。在上述基础上,进而得出了控制器参数的选取范围。然后,论文分析了已有时延的处理方法,考虑到马尔科夫过程的特点,得出天地间的大时延符合马尔科夫无后效性的特点,所以利用马尔科夫模型对天地间的大时延进行了预测建模,并通过软件模拟进行了验证。最后,为了验证所提出的系统的性能,进行了空间机器人遥操作系统地面仿真实验研究,根据实验结果验证了整个系统的可行性与有效性。更多还原

【Abstract】 Because of the large distance between heaven and earth, leading to it is difficult to remote control the space robot on the ground because of the large distance between heaven and earth, and the it will have great communication delay. The large time delay, will not only affect the stability of the teleoperation system, but also make the operator fail to receive the distant information, and would produce fatigue and great operating pressure, therefore, large time delay problems become one of the most difficulties in the space robot teleoperation system.Bilateral control has a series of advantages, such as it can be applied to the environment from the end of the unknown or unstructured and so on, these make the bilateral control become the research hot focus on teleoperation systems. The general bilateral teleoperation control was simplified to two port network model before, although this kind of structure is simple, and can satisfy the general remote operation task performance, but to the need for intricate task work, two channel structures cannot meet demand. According to the idea that the force and movement both can be transferred in round-trip, the researchers put forward the four channel bilateral control structure. On the basis of predecessors, this paper mainly completed the following work:First of all, after researching and analyzing the classic four channel structure, designed a kind of four-channel bilateral control system structure based on true force feedback, we named it as "KBG controller" according to the controller parameters, this structure in considering the true force supplied by operator, the effect of force feedback from the remote environment influence on the operator, and use the position deviation on the force correction.Then analysis performance of teleoperation bilateral control system which designed in last section, in the past the researchers mainly focus on analyzing system stability and transparency, in this paper we give a general Lyapunov energy function, using the passive theory to analysis, that the whole system passive conclusion, then can get the system stability, then give the transparency measurement function and analysis. But the two performances cannot fully reflect all the system performance, teleoperation system also needs the tracking ability of the slave to the master, namely system tracking performance, and also give the system tracking performance measurement function and analysis it. Use of system performance analysis, get the controller parameter selection range.After that, this paper analyses the existing delay processing methods, considering the characteristics of the Markov process, it was concluded that the time delay between heaven and earth with Markov no aftereffect characteristic of, therefore, use Markov model for large time delay between heaven and earth to forecasting and modeling, and verify it through software simulation.Finally in order to verify the performance of the proposed system, we search on a space robot teleoperation system of the ground validation simulink experiment, which has a1-dof slave manipulator, according to the experimental results verify the feasibility and validity of the whole system.更多还原