Power Systems Team

The Power Systems Sub-Team specializes in designing and integrating the energy systems that drive the exoskeleton. This team focuses on optimizing power delivery, efficiency, and reliability to ensure seamless performance in demanding scenarios. By developing innovative solutions for lightweight, durable power systems, they enable the exoskeleton to enhance strength and endurance for users effectively.

Sensors and Motors

Sensors

The exoskeleton leverages precision load cells embedded in each steel-toed boot to monitor and analyze gait forces in real-time. Each boot has two load cells, one in the toe and one in the heel, which measure and transmit weight distribution data. This information is processed to adjust the exoskeleton’s movements dynamically, enhancing user stability and responsiveness during operation.

Load Cell Specifications:

Type: Half-bridge strain gauge load cell
Placement: Two per boot (toe and heel)
Capacity: Measures forces up to 50 kg per sensor
Output: High-precision A/D conversion for force data
Compatibility: Interfaces with microcontrollers
Purpose: Monitors gait forces for stability and adaptive movement control

Motors

Two brushless DC motors with integrated encoders articulate the hip and knee joints. These motors provide precise control and smooth motion, ensuring that the exoskeleton responds dynamically to user input and environmental conditions. Their lightweight, compact design makes them ideal for the exoskeleton's demanding operational requirements.

Motor Specifications:

Type: Brushless DC motors with integrated encoders
Placement: Two motors at the hip joints, two at the knee joints
Max Speed: 220 RPM at rated torque
Encoder Resolution: High-precision control up to 0.05 degrees
Integration: Built-in planetary gear system
Purpose: Drives joint motion for smooth and adaptive movement

Power Delivery

Electrical power is distributed through custom PDB boards and regulated to maintain optimal performance across all systems.

Microcontrollers manage the power flow while interfacing with code developed by the software team to synchronize motor functions and sensor feedback.

Motors with built-in encoders at the knee and hip joints translate electrical input into precise mechanical movement, enabling smooth and adaptive motion.

Load sensors embedded in the boots provide real-time data on forces associated with gait, allowing for dynamic adjustments to enhance user stability and responsiveness.

Synergy

The power systems team focuses on designing and fabricating components that drive the exoskeleton’s functionality and adaptability. These include load-sensing footplates for gait analysis, bilaterally-placed motors with precise encoders for joint movement, and a waterproof electrical housing system for reliable power management.

Each component is engineered for seamless integration, enabling the exoskeleton to operate efficiently in real-world applications. The electrical housing has been refined to a waterproof, backpack-compatible casing.