H2W Technologies, Inc. has engineered and manufactured a custom multi-axis linear motor positioning stage designed to advance human mobility and gait rehabilitation research. The system was custom-built for a premier research institution dedicated to the study of human biomechanics. The primary goal of this research is to develop therapeutic interventions that help individuals, ranging from elderly patients to those recovering from severe accidents, regain and maintain their physical balance, stability, and long-term independence.
To effectively study human balance and fall-recovery mechanisms, researchers require a motion platform that can safely and dynamically interact with human subjects. The engineering requirements for this application required that the system support and rapidly manipulate a high-mass payload. In doing so, it also required short, high-velocity bursts of speed to simulate sudden trips, slips, or balance disruptions, demanding massive instantaneous force output. Further, achieving high-speed positioning while maintaining micron-level precision is critical to ensuring subject safety and producing accurate scientific data.
H2W addressed these challenges by designing the XX' Y Two-Axis Dual Rail Linear Motor Positioning Stage. Utilizing an H-gantry configuration, the platform provides exceptional structural stability and synchronization across multiple axes of motion.
The system features an innovative design optimized for high-force applications:
- H-Gantry Architecture: The bottom axis consists of two dual-rail stages, mechanically linked by a robust cross-axis, distributing loads evenly and eliminating structural deflection during rapid acceleration.
- High-Force Iron Core Technology: The platform uses BLSM-2E single-sided, iron-core brushless linear motors. These motors are specifically chosen for their ability to deliver massive force in a compact footprint, achieving a peak force of 506 lbs (2246 N) per axis at a 10% duty cycle.
- High-Resolution Feedback: To maintain tight control over short bursts of speed, the system integrates a 1-micron encoder, enabling the control system to react instantly to minuscule position changes.
- Low-Friction Guidance: Heavy-duty recirculating ball bearings provide smooth, low-friction linear guidance that can withstand substantial downward forces from human payloads.
The system's technical profile outlines its performance capabilities:
|
Parameter |
Specification (Per Axis / System) |
|
Motor Type |
BLSM-2E Iron Core Brushless Linear Motor |
|
Stroke Length (each axis) |
20 inches (508 mm) |
|
Continuous Force (100% Duty) |
170 lbs (755 N) |
|
Peak Force (10% Duty Burst) |
506 lbs (2,246 N) |
|
Feedback Resolution |
1-micron |
|
Bearing System |
Recirculating Ball Bearings |
|
Total System Mass |
Approx. 650 lbs (295 kg) |
By delivering instantaneous, high-force acceleration across a flexible 20-inch stroke, this positioning stage allows researchers to safely test human neuromuscular responses to sudden momentum shifts. The precision of the 1-micron encoder ensures that any automated safety stops or vector changes happen within milliseconds, protecting vulnerable participants. This system provides the underlying control and power necessary to unlock new insights into fall prevention, biomechanical recovery, and assistive technology design.
H2W Technologies specializes in the design and manufacture of linear and rotary motion products for the industrial, medical, and scientific industries. With decades of expertise in linear motors, voice coil actuators, and multi-axis positioning tables, H2W delivers custom-engineered motion solutions from its headquarters in Santa Clarita, California. For more information, visit www.h2wtech.com.