본문

서브메뉴

Resilient GPS Positioning Using Deep Neural Networks and Sensor Fusion With Factor Graph Optimization
Resilient GPS Positioning Using Deep Neural Networks and Sensor Fusion With Factor Graph O...
Resilient GPS Positioning Using Deep Neural Networks and Sensor Fusion With Factor Graph Optimization

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211151405
ISBN  
9798382233307
DDC  
004
저자명  
Ashwin Vivek Kanhere.
서명/저자  
Resilient GPS Positioning Using Deep Neural Networks and Sensor Fusion With Factor Graph Optimization
발행사항  
[Sl] : Stanford University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
134 p
주기사항  
Source: Dissertations Abstracts International, Volume: 85-11, Section: B.
주기사항  
Advisor: Grace Gao.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2024.
초록/해제  
요약Autonomous vehicles (AVs), such as self driving cars and unmanned aerial vehicles, will operate in dense urban areas and require decimeter-level positioning estimates, both of which are challenging for traditional GNSS-based positioning algorithms, such as weighted least squares. More recent algorithms, such as methods using factor graph optimization (FGO) or deep neural networks (DNNs), can potentially satisfy this accuracy requirement of AVs in deep urban areas by leveraging the computational resources and multiple sensors available on these platforms. However, these algorithms are susceptible to GNSS signal vulnerabilities, like GNSS spoofing and faults both in received measurements and satellite states, which must be mitigated to ensure the accuracy and availability of position estimates from these algorithms. This dissertation describes contributions to this end and discusses methods that mitigate GPS spoofing attacks and measurement faults. First, we describe a DNN for GNSS-based positioning that is robust to measurement faults, such as additive biases. In our architecture, we solve challenges that emerge when applying traditional DNNs to the task of GNSS-based positioning using specialized architectures and by estimating corrections to initial positions. We validate our architecture on simulated and real-world measurements, showing that it has better accuracy than equivalent model-based approaches in the local Down direction, and can have better accuracy in the North and East direction depending on the initialization error in our method. In simulation, we also show that our approach effectively mitigates additive biases in measurements. Second, we discuss our method that uses switchable constraints (SC) in an FGO-based GNSS positioning algorithm to mitigate GPS spoofing attacks. We use odometry sensors to improve positioning accuracy and obtain measurements independent of GPS to mitigate spoofing. We validate our proposed method in simulation, showing that it effectively mitigates spoofing attacks while maintaining accuracy similar to that of a naive FGO under nominal conditions. Our method also incorporates the upcoming Chimera signal enhancement for "loop closure" to improve accuracy in the nominal case. Third, we discuss our modular expectation-maximization (EM)-based architecture that jointly mitigates GPS spoofing and measurement faults. We formulate the positioning problem as a two stage process which is iteratively solved using EM. In the first stage, we estimate the likelihoods that GNSS measurements are authentic and fault-free. In the second stage, we obtain position estimates, incorporating the likelihoods of authenticity and fault-free measurements to provide resilience to both spoofing attacks and measurements faults, whichever might be present. We validate our architecture with realistic simulated measurements, showing that it effectively mitigates faults and spoofing while maintaining accuracy similar to naive algorithms in nominal operating conditions. Fourth, we discuss gnss_lib_py, an open-source, modular, and extendable Python library for processing GNSS measurements, file types and datasets. gnss_lib_py also provides baseline implementations of traditional state estimation algorithms and methods to simulate realistic GNSS measurements. The methods that we describe in this dissertation enable spoofing and fault resilient GNSS positioning, enabling a safer future for the navigation of autonomous vehicles.
일반주제명  
Computer science
일반주제명  
Robotics
키워드  
Deep neural networks
키워드  
Factor graph optimization
키워드  
Autonomous vehicles
키워드  
Switchable constraints
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 85-11B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008250123s2024        us                              c    eng  d
■001000017161501
■00520250211151405
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798382233307
■035    ▼a(MiAaPQ)AAI31255809
■035    ▼a(MiAaPQ)pd226jw5716
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a004
■1001  ▼aAshwin  Vivek  Kanhere.
■24510▼aResilient  GPS  Positioning  Using  Deep  Neural  Networks  and  Sensor  Fusion  With  Factor  Graph  Optimization
■260    ▼a[Sl]▼bStanford  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a134  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-11,  Section:  B.
■500    ▼aAdvisor:  Grace  Gao.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2024.
■520    ▼aAutonomous  vehicles  (AVs),  such  as  self  driving  cars  and  unmanned  aerial  vehicles,  will  operate  in  dense  urban  areas  and  require  decimeter-level  positioning  estimates,  both  of  which  are  challenging  for  traditional  GNSS-based  positioning  algorithms,  such  as  weighted  least  squares.  More  recent  algorithms,  such  as  methods  using  factor  graph  optimization  (FGO)  or  deep  neural  networks  (DNNs),  can  potentially  satisfy  this  accuracy  requirement  of  AVs  in  deep  urban  areas  by  leveraging  the  computational  resources  and  multiple  sensors  available  on  these  platforms.  However,  these  algorithms  are  susceptible  to  GNSS  signal  vulnerabilities,  like  GNSS  spoofing  and  faults  both  in  received  measurements  and  satellite  states,  which  must  be  mitigated  to  ensure  the  accuracy  and  availability  of  position  estimates  from  these  algorithms.  This  dissertation  describes  contributions  to  this  end  and  discusses  methods  that  mitigate  GPS  spoofing  attacks  and  measurement  faults.  First,  we  describe  a  DNN  for  GNSS-based  positioning  that  is  robust  to  measurement  faults,  such  as  additive  biases.  In  our  architecture,  we  solve  challenges  that  emerge  when  applying  traditional  DNNs  to  the  task  of  GNSS-based  positioning  using  specialized  architectures  and  by  estimating  corrections  to  initial  positions.  We  validate  our  architecture  on  simulated  and  real-world  measurements,  showing  that  it  has  better  accuracy  than  equivalent  model-based  approaches  in  the  local  Down  direction,  and  can  have  better  accuracy  in  the  North  and  East  direction  depending  on  the  initialization  error  in  our  method.  In  simulation,  we  also  show  that  our  approach  effectively  mitigates  additive  biases  in  measurements.  Second,  we  discuss  our  method  that  uses  switchable  constraints  (SC)  in  an  FGO-based  GNSS  positioning  algorithm  to  mitigate  GPS  spoofing  attacks.  We  use  odometry  sensors  to  improve  positioning  accuracy  and  obtain  measurements  independent  of  GPS  to  mitigate  spoofing.  We  validate  our  proposed  method  in  simulation,  showing  that  it  effectively  mitigates  spoofing  attacks  while  maintaining  accuracy  similar  to  that  of  a  naive  FGO  under  nominal  conditions.  Our  method  also  incorporates  the  upcoming  Chimera  signal  enhancement  for  "loop  closure"  to  improve  accuracy  in  the  nominal  case.  Third,  we  discuss  our  modular  expectation-maximization  (EM)-based  architecture  that  jointly  mitigates  GPS  spoofing  and  measurement  faults.  We  formulate  the  positioning  problem  as  a  two  stage  process  which  is  iteratively  solved  using  EM.  In  the  first  stage,  we  estimate  the  likelihoods  that  GNSS  measurements  are  authentic  and  fault-free.  In  the  second  stage,  we  obtain  position  estimates,  incorporating  the  likelihoods  of  authenticity  and  fault-free  measurements  to  provide  resilience  to  both  spoofing  attacks  and  measurements  faults,  whichever  might  be  present.  We  validate  our  architecture  with  realistic  simulated  measurements,  showing  that  it  effectively  mitigates  faults  and  spoofing  while  maintaining  accuracy  similar  to  naive  algorithms  in  nominal  operating  conditions.  Fourth,  we  discuss  gnss_lib_py,  an  open-source,  modular,  and  extendable  Python  library  for  processing  GNSS  measurements,  file  types  and  datasets.  gnss_lib_py  also  provides  baseline  implementations  of  traditional  state  estimation  algorithms  and  methods  to  simulate  realistic  GNSS  measurements.  The  methods  that  we  describe  in  this  dissertation  enable  spoofing  and  fault  resilient  GNSS  positioning,  enabling  a  safer  future  for  the  navigation  of  autonomous  vehicles.
■590    ▼aSchool  code:  0212.
■650  4▼aComputer  science
■650  4▼aRobotics
■653    ▼aDeep  neural  networks
■653    ▼aFactor  graph  optimization
■653    ▼aAutonomous  vehicles
■653    ▼aSwitchable  constraints
■690    ▼a0984
■690    ▼a0771
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g85-11B.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161501▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

미리보기

내보내기

chatGPT토론

Ai 추천 관련 도서


    신착도서 더보기
    최근 3년간 통계입니다.

    소장정보

    • 예약
    • 소재불명신고
    • 나의폴더
    • 우선정리요청
    • 비도서대출신청
    • 야간 도서대출신청
    소장자료
    등록번호 청구기호 소장처 대출가능여부 대출정보
    TF12971 전자도서 대출가능 마이폴더 부재도서신고 비도서대출신청 야간 도서대출신청

    * 대출중인 자료에 한하여 예약이 가능합니다. 예약을 원하시면 예약버튼을 클릭하십시오.

    해당 도서를 다른 이용자가 함께 대출한 도서

    관련 인기도서

    로그인 후 이용 가능합니다.