Remote ergonomic research in space: spacelab findings and a proposal

Area of Science:

• Human factors and ergonomics
• Spaceflight physiology
• Human-computer interaction in space

Background:

• Microgravity environments pose unique challenges for astronaut workspace design and task performance.
• Previous research has not fully quantified astronaut stabilization behaviors during extravehicular and intravehicular activities.
• Understanding crewmember movement and restraint is essential for optimizing spacecraft design and mission efficiency.

Purpose of the Study:

• To quantify astronaut behaviors related to restraint, stabilization, and mobilization in microgravity.
• To evaluate the effectiveness of current stabilization methods and identify areas for improvement.
• To propose a research model for future spacecraft ergonomics studies.

Main Methods:

• Utilized remotely situated video cameras to record astronaut activities during Spacelab missions.
• Operationally defined and quantified key performance behaviors including hand-hold, foot restraint, translation, and struggle.
• Conducted a second study focusing on the efficacy of foot restraints and hand stabilization techniques.

Main Results:

• Astronauts spent 32.2% of observed time using hand-holds and 35.3% using foot restraints.
• Inefficient one-handed working was observed, with 52 instances of hand stabilization during 18 single-foot restraint episodes.
• Significant time was dedicated to stabilization attempts, highlighting a need for more effective restraint systems.

Conclusions:

• Current stabilization methods are not fully optimized, leading to inefficient work practices.
• Adequate foot restraints are critical for enhancing astronaut performance and reducing wasted effort.
• The proposed research model using video analysis can inform future spacecraft design and operational protocols.