I am not aware of any specific Stewart robots designed to operate in extreme cold and vacuum conditions, such as -80 degrees Celsius and 0.09 bars. Stewart platforms, also known as hexapods, are robotic systems that utilize multiple actuators to provide motion and precision control in various applications. However, their suitability for extreme environments would depend on the specific design, materials, and components used.
Robotic systems intended for operation in cold and vacuum conditions would typically require specialized engineering and components to withstand the low temperatures and vacuum environment. Extreme temperature conditions can affect the performance and reliability of mechanical and electronic components, including sensors, actuators, and lubricants. Additionally, vacuum environments pose challenges such as potential outgassing of materials and increased risk of thermal expansion and contraction.
If you require a robotic system for operation in such extreme conditions, it would be best to consult with experts in the field of robotics and engineering who specialize in designing systems for harsh environments. They can provide guidance on available options, potential modifications, or suggest alternative solutions that meet your specific requirements.