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Safe Bipedal Locomotion and Navigation in Uncertain Environments
Safe Bipedal Locomotion and Navigation in Uncertain Environments
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105520
- ISBN
- 9798263338947
- DDC
- 620
- 서명/저자
- Safe Bipedal Locomotion and Navigation in Uncertain Environments
- 발행사항
- [Sl] : Georgia Institute of Technology, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 202 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: A.
- 주기사항
- Advisor: Zhao, Ye.
- 학위논문주기
- Thesis (Ph.D.)--Georgia Institute of Technology, 2024.
- 초록/해제
- 요약This dissertation addresses the challenge of enabling bipedal robots to navigate and op-erate autonomously in dynamic and uncertain environments. While industrial robots have been highly successful in structured settings such as factories and warehouses where robots perform predefined tasks in controlled environments with minimal uncertainty-replicating this success in real-world, dynamic scenarios remains a significant hurdle. De-spite recent advancements in humanoid robotics, integrating these robots into unstructured environments is difficult due to the complexity of bipedal locomotion and the need to pri-oritize safety for both the robot and the surrounding agents.This research focuses on overcoming these obstacles by developing a hierarchical ap-proach that includes high-level task planning, mid-level motion planning, and low-level full-body control, with the overarching goal of ensuring safe navigation in uncertain envi-ronments. The two primary sources of uncertainty explored in this thesis are obstacle un-certainty, which involves dynamic obstacles such as autonomous grounded mobile robots and human pedestrians, and terrain uncertainty, which includes partial observability and unknown terrain elevation.In this dissertation, we address the uncertainties in the following context. First, it ad-dresses formal task and motion planning in partially observable environments with dynamic obstacles. In this work, the environment is partially observable when static obstacles oc-clude the robot's view of certain regions in the environment; thus, guaranteeing collision avoidance with dynamic obstacles out of the robot's view becomes a challenging problem. To solve this, we develop a formal task planning framework based on Linear Temporal Logic (LTL), which provides guarantees for safe navigation and task completion. It em-ploys a belief abstraction method to handle out-of-view dynamic obstacles. A key feature of this work is the abstraction of reduced-order model safety theorems into symbolic spec-ifications to guarantee that the high-level task planner can be successfully executed by the underlying motion planner.The second work addresses obstacle uncertainty in the context of social navigation. In this task, the bipedal robot is tasked to navigate and reach a specific goal in an open en-vironment containing pedestrians. The bipedal robot is required to avoid collision with pedestrians and navigate in a socially acceptable manner. The pedestrians' dynamics are not known, thus we introduce the Social Zonotope Network (SZN), a Conditional Varia-tional Auto-encoder (CVAE) architecture for coupled pedestrian future trajectory predic-tion and ego-agent social path planning both parameterized as zonotopes. We integrate the SZN with a model predictive controller (MPC), where the zonotopes outputted by SZN are encoded as constraints for reachability-based motion planning and collision checking. Our results demonstrate the framework's effectiveness in producing a socially acceptable path with consistent locomotion velocity and optimality.Finally, we address terrain uncertainty in the context of search and rescue tasks, where we coordinate a heterogeneous team of bipedal and aerial robots. In this project, the terrain elevation is unknown. As the robots navigate the environment, they collect elevation data and update a terrain Gaussian process (GP) model. We present a terrain-aware MPC that solves the optimal paths for the bipedal while maximizing the traversability. We integrate lateral slopes derived from the terrain GP into the cost function of our proposed MPC framework. This method allows for a safer traversal of rough terrains by planning paths with minimum lateral slopes.
- 일반주제명
- Robots
- 일반주제명
- Temporal logic
- 일반주제명
- Planning
- 일반주제명
- Evacuations & rescues
- 일반주제명
- Robotics
- 일반주제명
- Public administration
- 기본자료저록
- Dissertations Abstracts International. 87-05A.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105520
■006m o d
■007cr#unu||||||||
■020 ▼a9798263338947
■035 ▼a(MiAaPQ)AAI32309492
■035 ▼a(MiAaPQ)GeorgiaTech76948
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a620
■1001 ▼aShamsah, Abdulaziz.
■24510▼aSafe Bipedal Locomotion and Navigation in Uncertain Environments
■260 ▼a[Sl]▼bGeorgia Institute of Technology▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a202 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: A.
■500 ▼aAdvisor: Zhao, Ye.
■5021 ▼aThesis (Ph.D.)--Georgia Institute of Technology, 2024.
■520 ▼aThis dissertation addresses the challenge of enabling bipedal robots to navigate and op-erate autonomously in dynamic and uncertain environments. While industrial robots have been highly successful in structured settings such as factories and warehouses where robots perform predefined tasks in controlled environments with minimal uncertainty-replicating this success in real-world, dynamic scenarios remains a significant hurdle. De-spite recent advancements in humanoid robotics, integrating these robots into unstructured environments is difficult due to the complexity of bipedal locomotion and the need to pri-oritize safety for both the robot and the surrounding agents.This research focuses on overcoming these obstacles by developing a hierarchical ap-proach that includes high-level task planning, mid-level motion planning, and low-level full-body control, with the overarching goal of ensuring safe navigation in uncertain envi-ronments. The two primary sources of uncertainty explored in this thesis are obstacle un-certainty, which involves dynamic obstacles such as autonomous grounded mobile robots and human pedestrians, and terrain uncertainty, which includes partial observability and unknown terrain elevation.In this dissertation, we address the uncertainties in the following context. First, it ad-dresses formal task and motion planning in partially observable environments with dynamic obstacles. In this work, the environment is partially observable when static obstacles oc-clude the robot's view of certain regions in the environment; thus, guaranteeing collision avoidance with dynamic obstacles out of the robot's view becomes a challenging problem. To solve this, we develop a formal task planning framework based on Linear Temporal Logic (LTL), which provides guarantees for safe navigation and task completion. It em-ploys a belief abstraction method to handle out-of-view dynamic obstacles. A key feature of this work is the abstraction of reduced-order model safety theorems into symbolic spec-ifications to guarantee that the high-level task planner can be successfully executed by the underlying motion planner.The second work addresses obstacle uncertainty in the context of social navigation. In this task, the bipedal robot is tasked to navigate and reach a specific goal in an open en-vironment containing pedestrians. The bipedal robot is required to avoid collision with pedestrians and navigate in a socially acceptable manner. The pedestrians' dynamics are not known, thus we introduce the Social Zonotope Network (SZN), a Conditional Varia-tional Auto-encoder (CVAE) architecture for coupled pedestrian future trajectory predic-tion and ego-agent social path planning both parameterized as zonotopes. We integrate the SZN with a model predictive controller (MPC), where the zonotopes outputted by SZN are encoded as constraints for reachability-based motion planning and collision checking. Our results demonstrate the framework's effectiveness in producing a socially acceptable path with consistent locomotion velocity and optimality.Finally, we address terrain uncertainty in the context of search and rescue tasks, where we coordinate a heterogeneous team of bipedal and aerial robots. In this project, the terrain elevation is unknown. As the robots navigate the environment, they collect elevation data and update a terrain Gaussian process (GP) model. We present a terrain-aware MPC that solves the optimal paths for the bipedal while maximizing the traversability. We integrate lateral slopes derived from the terrain GP into the cost function of our proposed MPC framework. This method allows for a safer traversal of rough terrains by planning paths with minimum lateral slopes.
■590 ▼aSchool code: 0078.
■650 4▼aRobots
■650 4▼aTemporal logic
■650 4▼aPlanning
■650 4▼aEvacuations & rescues
■650 4▼aRobotics
■650 4▼aPublic administration
■690 ▼a0771
■690 ▼a0617
■71020▼aGeorgia Institute of Technology.
■7730 ▼tDissertations Abstracts International▼g87-05A.
■790 ▼a0078
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360406▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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