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How Webb telescope improvement led to improved simulation software program

November 1, 2023
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How Webb telescope improvement led to improved simulation software program
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NASA's Webb telescope improves simulation software
An engineer examines the Webb telescope main mirror Engineering Design Unit section within the clear room at NASA’s Goddard House Flight Heart. Credit score: NASA

The James Webb House Telescope really explores the unknown, displaying gorgeous photos of beforehand unseen corners of the universe solely potential due to the telescope’s 21-foot segmented mirror that unfurled and assembled itself in area.

A long time of testing went into the supplies, design, and processes wanted to develop the most important telescope in area. Nonetheless, the entire mission was too advanced to check on the bottom, at scale, at –400°F, and in different space-like circumstances.

As a substitute, engineers relied on software program simulations to know how the telescope would behave beneath completely different in-space circumstances, and that work has helped advance the entire area of built-in laptop modeling.

“We pushed all the things, all of the simulation, simply as exhausting as it will go,” mentioned Erin Elliott, an optical engineer at Ansys, Inc., which makes Ansys Zemax OpticStudio, one of many design software program suites used to develop {hardware} and software program for the Webb telescope.

Simulation expertise has improved dramatically during the last twenty years due to will increase in computing energy and new methods of accessing offsite computing energy as a cloud service. However extra enhancements hint again on to Webb’s improvement.

Elliott used OpticStudio to assist the Webb telescope whereas working for different NASA contractors, starting within the early 2000s, earlier than beginning work in 2015 for Zemax—which later grew to become Ansys Zemax—headquartered in Canonsburg, Pennsylvania.

Within the early days, Elliott mentioned, Zemax tweaked its software program for the Webb telescope effort. “They made some particular adjustments for us on the time having to do with dealing with the coordinate methods of the segments,” she mentioned, referring to the 18 hexagonal segments that make up the telescope’s main mirror.

Elliott additionally recalled speaking to Zemax management quite a few instances in regards to the want for the software program to speak higher with different Microsoft Home windows applications. The corporate launched an API, or utility programming interface, for OpticStudio, which allows the suite to work with different applications and permits for additional customization. There have been loads of causes so as to add that expertise however Webb calls for had been possible important amongst them, Elliott mentioned.

Joseph Howard, an optical engineer at NASA’s Goddard House Flight Heart in Greenbelt, Maryland, the place Webb and its science instrument module had been assembled, famous that utilizing a number of modeling packages helped drive innovation within the area. “It is vital to have a number of software program firms on the market that may aid you not just for cross-checking the modeling, however as a result of they make one another higher by means of competitors,” he mentioned.







The Ansys Zemax OpticStudio software program package deal, pictured right here in a demo of James Webb House Telescope mirror modeling, was outfitted with new capabilities and options on account of getting used within the observatory’s improvement. Credit score: Ansys Inc.

Along with enhancements made to OpticStudio throughout Webb telescope improvement, Ansys Zemax in 2021 launched the Structural, Thermal, Evaluation, and Outcomes (STAR) module, which benefited from the information Elliott gained engaged on the NASA mission.

When a mirror or lens adjustments form resulting from temperature swings, the optics transfer. A lot of the OpticStudio modeling was accomplished in smaller items—engineers would run a thermal simulation independently and add that information to the following optical mannequin, producing extra information for the following run.

The STAR module incorporates analyses from different simulation software program immediately into OpticStudio optical fashions—an effectivity relevant to telescope and aerospace designs. This characteristic can be more and more vital for autonomous automobiles, mobile phone lenses, and different optics working in powerful environments.

Future telescopes and different spacecraft are more likely to contain components of the Webb design. Extra will journey in segments that should self-assemble in area, and the event of the more and more difficult robotics and optics will depend on improved modeling software program.

“Once we constructed Webb, we knew we could not absolutely check it on the bottom previous to flight, so we depended an entire lot upon modeling and doing evaluation to prepare for flight,” Howard mentioned. “The following nice observatory will probably be much more depending on modeling software program.”

In the meantime, designers of extra Earthly applied sciences are already seeing the advantages of an improved OpticStudio, utilizing it to design precision endoscopes, a thermal imager to detect COVID-19 exposures in a crowd, augmented actuality shows and headsets, a laser thruster expertise for nanosatellites, and, in fact, extra telescopes.

Elliott additionally famous that the Webb telescope mission educated the following cohort of telescope and optical machine builders—these designing and utilizing the telescope’s technological spinoffs.

“The individuals who constructed the Hubble House Telescope had been main the Webb Telescope,” she mentioned. “And now the youthful engineers who reduce our tooth on this mission and realized from it have gotten the group of people that will construct the following buildings.”

Elliott maintains that the mission “was value it alone for coaching this big cohort of younger engineers and releasing them into high-tech fields.”

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