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Groups | Devices | Researchers | Actuated DoF | Driving modes | Control strategies | Training modes |
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| Lokomat [101] | Zurich Switzerland | Two-leg DoFs | Motor drive | Position control Patient-cooperative strategy Posture control | Passive mode Active assist mode |
| LokoHelp [16] | Woodway & LokoHelp Group | Two-leg DoFs | Treadmill drive, standalone driving device not required | Trajectory tracking control | Passive mode Active assist mode |
Treadmill-based exoskeleton robots | ALEX [17] | Banala and Aqrawal et al. from University of Delaware, US | Seven DoFs for translations and rotation of a leg | Motor drive | Assist-as-needed control | Active mode |
| Lopes [18, 19] | Reneman et al. From university of Delaware, US | Three rotational DoFs in each leg | SEA (series elastic actuator) drive | Impedance control | Active mode Active assist mode |
| AAFO [20] | Seoul and Korea from Yonsei University | Two motion DoFs for ankle joint | SEA (series elastic actuator) drive | Force/impedance control | Active mode |
| KAFO [21] | The Department of Mechanical Engineering of the Ottawa University | Free motion DoFs in sagittal plane for ankle and knee | No driver, using the location of mechanical structure and spring to provide tailwind | Force control | Active assist mode |
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Leg orthoses exoskeleton robots | HAL [22] | University of Tsukuba, Japan | Full-body exoskeleton for arms, legs | Motor drive | Autonomous control Automatic mixture control | Active assist mode |
| BLEEX [23, 24] | Kazeroom et al. from University of California, US | Seven DoFs for each leg in hip, knee, and ankle joints | Hydraulic drive | EMG signal control Force control | Passive mode |
| Rutgers ankle [25] | Girone et al. of Rutgers University | Six DoFs ankle and foot based on a Stewart platform | Pneumatic drive | Impedance control Force control | Active mode Passive mode Active resist mode |
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Platform-based end-effector robots | ARBOT [26, 27] | Saglia et al. from Istituto Italiano di Tecnologia, Italy | Two ankle DoFs in plantar/dorsiflexion, inversion/eversion | Motor drive | Position control | Passive mode Active assist mode Active resist mode |
| Parallel ankle robots [28, 29] | Xie et al. from the University of Auckland New Zealand | Three ankle DoFs provided by 4-axis parallel robot | Motor drive | EMG-based evaluation and adaptive control | Active mode Passive mode |
| Gait Trainer GTI [30] | The Free University Berlin, Germany | Two footplates for foot/leg movement | Motor drive | Trajectory tracking control | Passive mode Active mode |
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Footplate-based end-effector robots | Haptic Walker [31] | Hesse et al. from Charite University Hospital, Germany | Arbitrary movement DoFs for two feet | Motor drive | Trajectory tracking control | Passive mode Active mode |
| G-EO Systems [32] | Reha Technology AG, Switzerland | Two footplates for walking and climbing DoFs | Motor drive | Position control Trajectory tracking control | Active assist mode |
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