Denmark's Andreas Mogensen, trials a skinsuit on the ISS in 2015
The Australian Space Agency is leading an international effort alongside NASA and the European Space Agency to develop three types of next-generation spacesuits that will protect the human body from the effects of prolonged time in space.
RMIT University has partnered with Human Aerospace, an Australian company that specialises in the fields of aerospace medicine, bioastronautics, life sciences and aeronautical engineering to help position Australia along with global leaders in compression spacesuit technology.
Professor Rajiv Padhye, Director of RMIT’s Centre for Materials Innovation and Future Fashion, said that his team were eager to apply their knowledge and expertise in compression garment design to the spacesuit project.
“This is an exciting opportunity to show our cross-disciplinary teamwork in design and technology and to partner with the best in the world on designing suits that will have a real impact on people’s health,” said Professor Padhye.
These suits will be the next step to allowing for longer space missions to planets such as Mars which with current rocket propulsion technology, would take nine months to travel there, and nine months to get back.
The health impacts associated with such prolonged missions is a major challenge that engineers, scientists and medical professionals are working together to overcome.
Director and Chief Engineer at Human Aerospace, Dr James Waldie said that the travel alone, notwithstanding scientific exploration of the surface of Mars itself, would take a tremendous toll on the human body.
“Bone loss is a particular challenge - it’s like an extreme version of osteoporosis. Your hip bones could age by 50 years over a Mars mission.
To get around these impacts, astronauts currently use exercise machines for around 2 hours each day while on the spacecraft.
Whilst this is fairly effective in maintaining strength, spacecraft on longer expeditions in future won’t have the same capability to carry these bulky exercise machines, nor the spares necessary for their continued use.
That’s why we’re prototyping a suit that keeps them in shape just by wearing it” said Dr Waldie.
The skin-tight elastic skinsuit inside the spacesuit will mimic the impact of gravity on the body in order to mitigate bone and muscle loss that astronauts can experience in a weightlessness environment. The suits will also help impose Earth-like longitudinal loading on the torso and lower body.
According to Dr Waldie, “Being very light elastic and requiring no power, it allows the astronauts to continue working when in use, so it is well suited to extended space missions”.
The team is also developing spacesuit to be worn by astronauts on spacewalks that will solve the issues relating to gas pressurised suits.
“Existing gas - pressurised suits for spacewalking are amazing personal spaceships, but they are also bulky, heavy, rigid, unsafe, and require high maintenance.
New designs and advancements are critical in this area too and we think elastic skinsuit pressure layers could work well as an alternative or supplement to traditional gas pressurised layers in spacesuits” said Dr Waldie.
According to Dr Waldie, the main challenge will be activating the elastics within the suit to manage to pressure and allow the suits to be put on and take off with ease.
“We will work with our US collaborators in exploring new ways to achieve this activation and enable skinsuits to be a feasible option in the future, providing lighter, safer and more dexterous spacesuits,” said Dr Waldie.
The final suit will surprisingly not be for use in space, but rather to help astronauts adjust to being back on Earth after prolonged exposure to a weightlessness environment.
Similar to G-suits worn by high altitude pilots, the Earth suit will help astronauts stay health as their blood returns to pool in the lower extremities in the body as opposed to how it was equalised across their body when in space.
This will help astronauts avoid orthostatic intolerance which results in fainting as they are not using to their blood reacting to an environment where gravity is prevalent
One of the spacesuits will be designed as a concept only whilst the other two will be fully developed as highly advanced prototypes.
Dr Waldie says that “this type of technology is not only about aiding the health and safety of astronauts, but also in creating medical technologies to help treat the broader population in cases such as burns, lymphedema and Peripheral Vascular Disease”.