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HomeRobots

ALICE 4

ALICE 4 is a 160 cm humanoid robot with 41 DOF, proprietary gearless linear actuators, embedded AI compute, enabling precise, natural interactive tasks.
Software Type
Closed Source
Software Package
Real-time Field-Oriented Control (FOC) for linear actuators. Vision and depth-sensing AI pipelines with object detection. Natural Language Processing (NLP) and gesture generation. VR-based teleoperation tools for skill transfer.
Aparobot Readiness Score
ARS?
0
...
Actuators
Proprietary in-house developed gearless linear actuators with low friction and high precision.
Compiute
Intel Core i7-1370PE (6P+8E cores, 20 threads, 1.90 GHz, 28 W TDP) via GENE-RAP6 embedded module, for motion control. NVIDIA Jetson Orin NX for perception and AI
Sensors
Force Sensing Resistors (FSR) for tactile feedback. Inertial Measurement Unit (IMU) for balance and movement monitoring. Depth cameras enabling 3D environment perception.
Max Op. time
mins

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Robot Brief

ALICE 4 is an advanced humanoid robot platform developed by South Korea based AeiRobot. Standing around 160 cm tall and weighing approximately 45 kg, it features 41 degrees of freedom and proprietary gearless linear actuators which allow for highly precise and natural human-like movements. ALICE 4 emphasizes quiet operation, energy efficiency, and durability through an innovative linear actuator design without reducers. It integrates an onboard NVIDIA Jetson Orin NX compute module for AI vision, depth sensing, and real-time control, positioning it as a next-generation robot for diverse human environments. Its development is focused on seamless human interaction and multi-task support in commercial, research, and service applications.

Use Cases

  • Precise Human-Like Physical Manipulation:
    Executes complex manipulation tasks, from delicate assembly to heavier object handling, using 7-DoF arms and 6-DoF hands with impedance control that responds dynamically to external forces.
  • Bipedal Locomotion in Unstructured Environments:
    Navigates stairs, narrow spaces, and uneven terrain as a fully bipedal platform, accessing areas inaccessible to wheeled robots.
  • Multi-Modal Perception and Environment Awareness:
    Uses stereo depth cameras and a 6-axis IMU alongside custom foot contact sensors for spatial awareness, balance, and real-time proprioceptive control.
  • Embedded AI Task Execution:
    Runs AI inference directly onboard via an NVIDIA Jetson Orin NX module, enabling real-time vision-based object detection and task execution without reliance on external networks.
  • VR Teleoperation and Imitation Learning:
    Supports VR-based remote control and skill transfer workflows, enabling rapid training of new behaviours through human demonstration.
  • Natural Language and Gesture-Based Interaction:
    Processes natural language commands and generates context-appropriate physical responses through integrated NLP and AI pipelines.

Industries

  • Research and Development:
    Serves as a development platform for embodied AI, locomotion control, dexterous manipulation research, and human-robot interaction studies in academic and corporate R&D settings.
  • Commercial and Service Robotics:
    Applicable in customer-facing service roles in hospitality, retail, and corporate environments where human-scale form factor and natural interaction capability are required.
  • Education and Entertainment:
    Used in demonstrations, interactive exhibitions, and educational settings to illustrate advanced robotics and human-robot collaboration.
  • Healthcare and Rehabilitation:
    Potential deployment for assistive robotics applications, patient engagement, and rehabilitation support where precise, safe physical interaction with humans is required.

Specifications

Length
-
mm
Width
-
mm
Height (ResT)
-
mm
Height (Stand)
-
1600
mm
Height (Min)
-
mm
Height (Max)
-
mm
Weight (With Batt.)
-
45
kg
Weight (NO Batt.)
-
kg
Max Step Height
-
mm
Max Slope
+/-
-
°
Op. Temp (min)
-
°C
Op. Temp (Max)
-
°C
Ingress Rating
-
No items found.

Intro

ALICE 4 stands 160 cm tall and weighs approximately 45 kg. Its 41 degrees of freedom are distributed as: 6 DoF per leg (12 total) for bipedal locomotion including stair climbing and navigation on uneven terrain; 7 DoF per arm (14 total) for humanlike reach and manipulation; 1 DoF at the waist for torso rotation; 2 DoF in the head for perception and interaction; and 6 DoF per hand (12 total) for dexterous object handling. All joints are powered by AeiRobot's proprietary linear actuators, developed entirely in-house without reduction gears. These actuators are highly sensitive to current, back-drivable, and operate with a low reduction ratio that minimises inertia and mechanical noise. The integrated heatsink frame and thermal management system within each actuator dissipate motor-generated heat passively, enabling sustained operation under load. Dedicated motor drivers enable real-time Field-Oriented Control (FOC) for precise torque management across all joints.

The onboard compute architecture consists of two modules operating in parallel: an Intel Core i7-1370PE processor (6 performance cores + 8 efficiency cores, 20 threads, 1.90 GHz base, 28 W TDP) handling real-time motion control, and an NVIDIA Jetson Orin NX module managing perception, vision-based AI inference, and object detection pipelines. This split-compute design allows the control loop and AI workflows to run independently, improving system stability and responsiveness. The sensor suite includes a stereo depth camera for 3D environment perception, a 6-axis IMU for balance and movement monitoring, and custom foot contact sensors (Force Sensing Resistors) for proprioceptive ground interaction feedback. A URDF model is available for download from the AeiRobot developer site, supporting simulation and development integration.

Connectivity

  • Supports Wi-Fi for cloud integration and control.
  • Compatible with remote monitoring and AI model updates.

Capabilities

  • Gearless Linear Actuator Control:
    Proprietary in-house linear actuators provide precise impedance control, back-drivability, low friction, and quiet operation without reducers, enabling safe and natural physical interaction with humans.
  • Force-Based Impedance Control:
    Arms and hands respond dynamically to external forces via impedance control, a critical safety feature for robots operating in close proximity to people.
  • Bipedal Navigation in Complex Environments:
    Climbs stairs, navigates narrow spaces, and traverses uneven terrain as a fully bipedal platform, operating in environments inaccessible to wheeled robots.
  • Embedded AI Inference:
    NVIDIA Jetson Orin NX runs object detection and AI vision pipelines directly on the robot without dependence on external network connectivity, supporting reliable real-world deployment.
  • VR Teleoperation and Skill Transfer:
    Supports VR-based remote control interfaces and imitation learning workflows, enabling rapid skill acquisition through human demonstration.
  • Multi-Modal Sensor Fusion:
    Integrates stereo depth camera, 6-axis IMU, and custom foot contact sensor data for comprehensive environmental awareness, balance control, and proprioceptive feedback.