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SELF-LOCALIZATION AND ENVIRONMENT BUILDING METHODS FOR SMALL NONHOLONOMIC MANOEUVRABLE TWO-WHEEL MOBILE ROBOTS

机译:小非完整可操纵两轮移动机器人的自定位与环境构建方法

摘要

The thesis presents a kinematic and dynamic model of the mobile robot platform derived by Lagrange D’Alembert methodologies and system control using a closed-loop PD controller. Innovative research in self-localization is presented in this thesis with the use of a double compass configuration that exploits a fusion of relative and absolute localization methods to achieve an analytical solution to position. In order to validate this novel double compass self-localization method, an optimized method was proposed in the form of an overhead computer system and a two-wheel manoeuvrable nonholonomic mobile robot was developed to facilitate research in self-localization methods with shaft encoders, accelerometers, magnetometers, and gyroscopes. The computer system was used to improve the performance of track non-natural markers on the mobile robot. A novel pseudo random algorithm with a gradient policy, inspired by the skip-list method, was delivered to significantly improve the image scanning performance to find non-natural markers. The validation, analysing the data collected from double compass configuration compared to visual tracking data was carried out using a non-parametric single-sample statistical analysis using the Kolmogorov-Smirnov test and the results validated the null hypothesis with a mean error less than 12mm. After solving the translational position of the mobile robot on a 2-dimentional plane, the mobile robot needs to be aware of its 3-dimentional orientation. To achieve this, a 9-axis sensor using an accelerometer, a gyroscope, and a magnetometer were implemented, to form an inertial measurement unit capable of returning a highly accurate self-orientation position using a directional cosine matrix which returns model free from accumulating error. A novel closed-loop PI controller was derived using the directional cosine matrix. In order to validate the directional cosine matrix method, data was collected from the sensor and compared against visual tracking data. The directional cosine matrix method data was validated using a non-parametric single-sample statistical analysis using the Kolmogorov-Smirnov test validated the null hypothesis with a mean error less than 1˚.
机译:本文提出了一种移动机器人平台的运动学和动力学模型,该模型是由Lagrange D'Alembert方法推导的,并使用闭环PD控制器进行了系统控制。本文采用双罗盘配置对自我定位进行了创新性研究,该配置采用相对定位和绝对定位方法的融合来实现位置解析解决方案。为了验证这种新颖的双罗盘自定位方法,以高架计算机系统的形式提出了一种优化方法,并开发了一种两轮可操纵的非完整移动机器人,以促进轴编码器,加速度计的自定位方法的研究。 ,磁力计和陀螺仪。该计算机系统用于改善移动机器人上跟踪非自然标记的性能。受跳过列表方法启发,提出了一种具有梯度策略的新型伪随机算法,以显着提高图像扫描性能以查找非自然标记。使用非参数单样本统计分析,使用Kolmogorov-Smirnov检验,进行了从双罗盘配置收集的数据与视觉跟踪数据相比的分析验证,结果验证了平均误差小于12mm的零假设。在解决了移动机器人在二维平面上的平移位置之后,移动机器人需要知道其三维方向。为了实现这一点,实现了使用加速度计,陀螺仪和磁力计的9轴传感器,以形成惯性测量单元,该惯性测量单元可以使用有向余弦矩阵返回高度准确的自定向位置,该余弦矩阵返回没有累积误差的模型。使用方向余弦矩阵推导了一种新颖的闭环PI控制器。为了验证方向余弦矩阵方法,从传感器收集了数据,并与视觉跟踪数据进行了比较。使用Kolmogorov-Smirnov检验进行的非参数单样本统计分析验证了定向余弦矩阵方法的数据,验证了原假设的平均误差小于1˚。

著录项

  • 作者

    Georgiou Evangelos;

  • 作者单位
  • 年度 2015
  • 总页数
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类

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