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24 Sep 2021, 23:28 [ UTC - 5; DST ]


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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 25 Apr 2021, 16:58 
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Third flight successful. Remarkable accomplishments. Photo here.

Quote:
...The helicopter took off at 1:31 a.m. EDT (4:31 a.m. PDT), or 12:33 p.m. local Mars time, rising 16 feet (5 meters) – the same altitude as its second flight. Then it zipped downrange 164 feet (50 meters), almost half the length of a football field, reaching a top speed of 6.6 feet per second (2 meters per second)...

The Mastcam-Z imager aboard NASA’s Perseverance Mars rover, which is parked at “Van Zyl Overlook” and serving as a communications base station, captured video of Ingenuity. In the days ahead, segments of that video will be sent back to Earth showing most of the helicopter’s 80-second journey across its flight zone.

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 26 Apr 2021, 10:11 
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Username Protected wrote:
Nasa today is more the equivalent of samuel langley circa 1900. Government-funded, committed in principle to advancing science, but too mired in bureaucracy and confined thinking to create a step change in technical capability.

I agree in most regards, but JPL seems to be an exception. The work they do there is generally directed, focused, technologically advanced, and successful. There seems to be much less bureaucracy at JPL than in the manned space flight program that we normally associate with NASA.

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 29 Apr 2021, 13:42 
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Very nice aerial photo that includes the rover (far left corner) and small sand deposits is here: https://mars.nasa.gov/resources/25862/i ... m-the-air/
Jay

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 30 Apr 2021, 20:15 
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Cool photo of Ingenuity from the rover on the fourth hop:
Attachment:
PIA24642-16x9-web1.jpg


Please login or Register for a free account via the link in the red bar above to download files.

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 01 May 2021, 20:58 
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The team now plans to expand Ingenuity's mission to include operational tasks. Read the details here.

Quote:
Ingenuity’s transition from conducting a technology demonstration to an operations demonstration brings with it a new flight envelope. Along with those one-way flights, there will be more precision maneuvering, greater use of its aerial-observation capabilities, and more risk overall....

With short drives expected for Perseverance in the near term, Ingenuity may execute flights that land near the rover’s current location or its next anticipated parking spot. The helicopter can use these opportunities to perform aerial observations of rover science targets, potential rover routes, and inaccessible features while also capturing stereo images for digital elevation maps. The lessons learned from these efforts will provide significant benefit to future mission planners. These scouting flights are a bonus and not a requirement for Perseverance to complete its science mission.

The cadence of flights during Ingenuity’s operations demonstration phase will slow from once every few days to about once every two or three weeks, and the forays will be scheduled to avoid interfering with Perseverance’s science operations.

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 07 May 2021, 14:36 
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The latest video includes (faint) audio of the helicopter in action. Video and details here.

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 28 May 2021, 22:35 
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This account of the sixth flight describes some amazing engineering.

Intro:

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On the 91st Martian day, or sol, of NASA’s Mars 2020 Perseverance rover mission, the Ingenuity Mars Helicopter performed its sixth flight. The flight was designed to expand the flight envelope and demonstrate aerial-imaging capabilities by taking stereo images of a region of interest to the west. Ingenuity was commanded to climb to an altitude of 33 feet (10 meters) before translating 492 feet (150 meters) to the southwest at a ground speed of 9 mph (4 meters per second). At that point, it was to translate 49 feet (15 meters) to the south while taking images toward the west, then fly another 164 feet (50 meters) northeast and land.

Telemetry from Flight Six shows that the first 150-meter leg of the flight went off without a hitch. But toward the end of that leg, something happened: Ingenuity began adjusting its velocity and tilting back and forth in an oscillating pattern. This behavior persisted throughout the rest of the flight. Prior to landing safely, onboard sensors indicated the rotorcraft encountered roll and pitch excursions of more than 20 degrees, large control inputs, and spikes in power consumption.

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 29 May 2021, 13:30 
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... Ingenuity began adjusting its velocity and tilting back and forth in an oscillating pattern. This behavior persisted throughout the rest of the flight. Prior to landing safely, onboard sensors indicated the rotorcraft encountered roll and pitch excursions of more than 20 degrees, large control inputs, and spikes in power consumption.

So... it hit some turbulence? :shrug:

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 29 May 2021, 14:28 
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The article describes the circumstances. It’s a fascinating read that explains how the rotorcraft maintains its orientation and navigates, and how the engineering team anticipated problems and designed systems to handle them.

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 29 May 2021, 15:33 
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The article describes the circumstances. It’s a fascinating read that explains how the rotorcraft maintains its orientation and navigates, and how the engineering team anticipated problems and designed systems to handle them.

Ok, thanks for prodding me to read the article in the first place, it is a much more fascinating problem than just turbulence. :)

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 30 May 2021, 08:58 
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Username Protected wrote:
The article describes the circumstances. It’s a fascinating read that explains how the rotorcraft maintains its orientation and navigates, and how the engineering team anticipated problems and designed systems to handle them.


Good that they identified a race condition in the software. But will they fix it knowing how dangerous remote software updates can be?


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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 30 May 2021, 17:39 
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Username Protected wrote:
Good that they identified a race condition in the software. But will they fix it knowing how dangerous remote software updates can be?

They’ve already updated the software on the rover to “surface” vs “landing”. That was a planned event, so they have a process. I want to say that the helicopter got an update but maybe not. It’s a chance, but they can’t leave it as it is. Properly done it shouldn’t be a big risk.

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 17 Aug 2021, 18:05 
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JPL is getting bolder with Ingenuity’s flight plans:

https://arstechnica.com/science/2021/08 ... a-cropper/

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