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Assessment of Relocated Haptic Feedback in Virtual Environments
Assessment of Relocated Haptic Feedback in Virtual Environments
Assessment of Relocated Haptic Feedback in Virtual Environments

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202104849
ISBN  
9798288816499
DDC  
600
저자명  
Palmer, Jasmin E.
서명/저자  
Assessment of Relocated Haptic Feedback in Virtual Environments
발행사항  
[Sl] : Stanford University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
124 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
주기사항  
Advisor: Okamura, Allison.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2025.
초록/해제  
요약Relocation of haptic feedback from the fingertips to the wrist enables haptic interaction with virtual environments while leaving the fingers free for dexterous manipulation tasks. Human tactile perception is correlated with mechanoreceptor density in the skin and is therefore greater in the glabrous skin of the fingertips than elsewhere on the body, making the fingertips ideal for tactile interactions. However, haptic devices designed for enabling tactile interaction in virtual environments are often bulky and cumbersome, limiting the ability to perform fine motor tasks, such as dexterous manipulation, or directly manipulating physical objects. Devices mounted on the fingertips also hinder finger tracking during interaction with virtual or augmented reality environments by occluding optical trackers or occupying space for electromagnetic tracking elements. First, we developed a pair of wrist-worn tactile haptic devices and a virtual environment to study how various mappings between fingers and tactors affect task performance. The haptic feedback rendered to the wrist reflects the interaction forces occurring between a virtual object and virtual avatars controlled by the index finger and thumb. We performed a user study comparing four different finger-to-tactor haptic feedback mappings and one no-haptic-feedback condition as a control. We evaluated users' ability to perform a simple pick-and-place task via the metrics of task completion time, path length of the fingers and virtual cube, and magnitudes of normal and shear forces at the fingertips. We found that multiple mappings were effective, and there was a greater impact when visual cues were limited. Next, we enabled relocation of finger interaction forces in a virtual environment is using soft, 3D-printed, pneumatic wrist-worn haptic devices called haptic voxels, or Hoxels, a soft, 3D-printed, pneumatically actuated wrist-worn haptic device that can apply skin deformation in up to 3-DoF. Hoxels can display up to 20 N of force normal to the skin. Due to off-board pumps and flexible pneumatic transmission lines, the worn mass of a pair of Hoxels is only 75 grams. Using the Hoxels, we performed a user study in which participants grasped and moved a cube in a virtual environment, with virtual interaction forces displayed to the wrist. We showed that dual-tactor and single-tactor relocated haptic feedback reduced grasp forces compared to no haptic feedback. This lays the foundation for multi-degree-of-freedom (DoF) feedback to the wrist, leaving the fingers unencumbered for mixed reality applications. Next, we performed a post-hoc blocked force characterization for the Hoxel and blocked force-torque characterization for the FingerPrint, a soft, 3D-printed, pneumatically actuated finger-worn haptic device that can apply skin deformation in up to 4-DoF. Our aim was to give physical significance to the duty cycle input used during the psychophysical study. Despite the intention to output unidirectional shear force and torque, we measured non-negligible off-axis components. We show the resulting 3-DoF vectors, which includes necessary normal forces, for each force or torque command. Finally, we conducted three parallel method of constant stimuli psychophysical studies to find the just noticeable difference of stimuli produced by soft pneumatically actuated devices at the index finger, thumb, and wrist. Additionally, we sought to quantify the difference along the phalanges of the fingers, the dorsal and ventral sides of the wrist, and between the multiple locations of the fingers and wrist. We discuss the measured force and torque range and accuracy from the characterization experiment and the measured just noticeable differences and Weber Fractions for the psychophysical studies. We also discuss the limitations of these studies and what insights in can be gathered and applied for designing soft wearable haptic devices and rendering schemes. This dissertation focuses on the design, perception, and effectiveness of wrist-based feedback for haptic interactions with virtual environments. We demonstrate that relocated feedback from the fingertips to the wrist can be effective at helping users modulate interaction forces applied to virtual objects during dexterous manipulation tasks. We also demonstrate that there is a quantifiable difference in the multi-DoF stimuli produced by soft wearable devices. This lays the groundwork for designing next-generation virtual environments augmented with relocated haptic feedback.
일반주제명  
Mechanical properties
일반주제명  
Wrist
일반주제명  
Relocation
일반주제명  
Quantitative psychology
일반주제명  
Nervous system
일반주제명  
Deformation
일반주제명  
Realism
일반주제명  
Education
일반주제명  
Fingers & toes
일반주제명  
Robotics
일반주제명  
Mechanical engineering
키워드  
Virtual environments
키워드  
Degree-of-freedom
키워드  
Human tactile perception
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 87-02B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aPalmer,  Jasmin  E.
■24510▼aAssessment  of  Relocated  Haptic  Feedback  in  Virtual  Environments
■260    ▼a[Sl]▼bStanford  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a124  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-02,  Section:  B.
■500    ▼aAdvisor:  Okamura,  Allison.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2025.
■520    ▼aRelocation  of  haptic  feedback  from  the  fingertips  to  the  wrist  enables  haptic  interaction  with  virtual  environments  while  leaving  the  fingers  free  for  dexterous  manipulation  tasks.  Human  tactile  perception  is  correlated  with  mechanoreceptor  density  in  the  skin  and  is  therefore  greater  in  the  glabrous  skin  of  the  fingertips  than  elsewhere  on  the  body,  making  the  fingertips  ideal  for  tactile  interactions.  However,  haptic  devices  designed  for  enabling  tactile  interaction  in  virtual  environments  are  often  bulky  and  cumbersome,  limiting  the  ability  to  perform  fine  motor  tasks,  such  as  dexterous  manipulation,  or  directly  manipulating  physical  objects.  Devices  mounted  on  the  fingertips  also  hinder  finger  tracking  during  interaction  with  virtual  or  augmented  reality  environments  by  occluding  optical  trackers  or  occupying  space  for  electromagnetic  tracking  elements.  First,  we  developed  a  pair  of  wrist-worn  tactile  haptic  devices  and  a  virtual  environment  to  study  how  various  mappings  between  fingers  and  tactors  affect  task  performance.  The  haptic  feedback  rendered  to  the  wrist  reflects  the  interaction  forces  occurring  between  a  virtual  object  and  virtual  avatars  controlled  by  the  index  finger  and  thumb.  We  performed  a  user  study  comparing  four  different  finger-to-tactor  haptic  feedback  mappings  and  one  no-haptic-feedback  condition  as  a  control.  We  evaluated  users'  ability  to  perform  a  simple  pick-and-place  task  via  the  metrics  of  task  completion  time,  path  length  of  the  fingers  and  virtual  cube,  and  magnitudes  of  normal  and  shear  forces  at  the  fingertips.  We  found  that  multiple  mappings  were  effective,  and  there  was  a  greater  impact  when  visual  cues  were  limited.  Next,  we  enabled  relocation  of  finger  interaction  forces  in  a  virtual  environment  is  using  soft,  3D-printed,  pneumatic  wrist-worn  haptic  devices  called  haptic  voxels,  or  Hoxels,  a  soft,  3D-printed,  pneumatically  actuated  wrist-worn  haptic  device  that  can  apply  skin  deformation  in  up  to  3-DoF.  Hoxels  can  display  up  to  20  N  of  force  normal  to  the  skin.  Due  to  off-board  pumps  and  flexible  pneumatic  transmission  lines,  the  worn  mass  of  a  pair  of  Hoxels  is  only  75  grams.  Using  the  Hoxels,  we  performed  a  user  study  in  which  participants  grasped  and  moved  a  cube  in  a  virtual  environment,  with  virtual  interaction  forces  displayed  to  the  wrist.  We  showed  that  dual-tactor  and  single-tactor  relocated  haptic  feedback  reduced  grasp  forces  compared  to  no  haptic  feedback.  This  lays  the  foundation  for  multi-degree-of-freedom  (DoF)  feedback  to  the  wrist,  leaving  the  fingers  unencumbered  for  mixed  reality  applications.  Next,  we  performed  a  post-hoc  blocked  force  characterization  for  the  Hoxel  and  blocked  force-torque  characterization  for  the  FingerPrint,  a  soft,  3D-printed,  pneumatically  actuated  finger-worn  haptic  device  that  can  apply  skin  deformation  in  up  to  4-DoF.  Our  aim  was  to  give  physical  significance  to  the  duty  cycle  input  used  during  the  psychophysical  study.  Despite  the  intention  to  output  unidirectional  shear  force  and  torque,  we  measured  non-negligible  off-axis  components.  We  show  the  resulting  3-DoF  vectors,  which  includes  necessary  normal  forces,  for  each  force  or  torque  command.  Finally,  we  conducted  three  parallel  method  of  constant  stimuli  psychophysical  studies  to  find  the  just  noticeable  difference  of  stimuli  produced  by  soft  pneumatically  actuated  devices  at  the  index  finger,  thumb,  and  wrist.  Additionally,  we  sought  to  quantify  the  difference  along  the  phalanges  of  the  fingers,  the  dorsal  and  ventral  sides  of  the  wrist,  and  between  the  multiple  locations  of  the  fingers  and  wrist.  We  discuss  the  measured  force  and  torque  range  and  accuracy  from  the  characterization  experiment  and  the  measured  just  noticeable  differences  and  Weber  Fractions  for  the  psychophysical  studies.  We  also  discuss  the  limitations  of  these  studies  and  what  insights  in  can  be  gathered  and  applied  for  designing  soft  wearable  haptic  devices  and  rendering  schemes.  This  dissertation  focuses  on  the  design,  perception,  and  effectiveness  of  wrist-based  feedback  for  haptic  interactions  with  virtual  environments.  We  demonstrate  that  relocated  feedback  from  the  fingertips  to  the  wrist  can  be  effective  at  helping  users  modulate  interaction  forces  applied  to  virtual  objects  during  dexterous  manipulation  tasks.  We  also  demonstrate  that  there  is  a  quantifiable  difference  in  the  multi-DoF  stimuli  produced  by  soft  wearable  devices.  This  lays  the  groundwork  for  designing  next-generation  virtual  environments  augmented  with  relocated  haptic  feedback.
■590    ▼aSchool  code:  0212.
■650  4▼aMechanical  properties
■650  4▼aWrist
■650  4▼aRelocation
■650  4▼aQuantitative  psychology
■650  4▼aNervous  system
■650  4▼aDeformation
■650  4▼aRealism
■650  4▼aEducation
■650  4▼aFingers  &  toes
■650  4▼aRobotics
■650  4▼aMechanical  engineering
■653    ▼aVirtual  environments
■653    ▼aDegree-of-freedom
■653    ▼aHuman  tactile  perception
■690    ▼a0771
■690    ▼a0632
■690    ▼a0515
■690    ▼a0548
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g87-02B.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359202▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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