The solar panel furling problem was a design problem, as are most of the problems encountered. I laughed when the crew lost their grease gun bag, thinking why on earth (a pun) would they design a joint that would require adding grease? Here in the ground we use grease not so much for lubrication, but to prevent moisture entry and oxydation. In space a PTFE bearings would seem like a no brainer as I have often used them in aircraft bearings with good results in areas that the FAA rules do not apply. I think that non-engineers make too many decisions based on time and costs that reflect poorly back to the enineering staff. Prior to every flight mission I advise my crew "Don't break anything, don't even touch anything, and please try to keep it out of the ocean!" And to my ground crews I add "Don't just do something, just stand there (and think about what you are observing before you act)".
A word about NASA Mission Control. Yes they were experts in their various subsystems, but contrary to popular myth, they did not know everything about everything. Some were engineers but others were well trained operators. In my experience, engineers make very poor operators. It may possibly be due to boredom or perhaps their minds drift toward improving what they are looking at rather than being aware of the content of what they are looking at. On top of that, telemetry often lies. This again can be traced back to design problems and most design problems can be traced back to time and money. It seems to all be circular.
I too will side with humans, just not all of them universally. Some humans should never touch tools at all. Many lack "psi". Some can destroy a cast iron ball with nothing more than a powder puff. I think of them as being negativly gifted.
When I had seen the advertisements for the movie {I Robot}, I thought that the still photos in the cleverly designed movie add, were an advertisement for a real android. "I had tried looking this up on the net"!
There are two factors in the use of this kind of robot. Since this is a machine man reference, there are always the unforeseen problems such as a piece of equipment getting in the way, that only a human could handle. This situation, or an unforeseen difficulty that would block a more simplistic robot_?
This society for some self-paranoid reason has not elected to design and build its first rentable by lease home anthropomorphic robots?
I feel that to where robots are nice and "in this case it's really a man to machine inference", that a better robotic ,"like us", company start should at this point be in the works for both developers and potential customers.
You still need mankind in near space to fill the gaps where a faulty situationed robot falls short.
George, your stories make me wonder if things could work less well when designed for servicing by robots instead of humans. I mean, if it had to work or you, a human, were dead, then perhaps there might be a lessening of standards for robot-serviced equipment, since robots being damaged are more acceptable. I hope that's not true.
That's an interesting point you bring up about cost, Alex. The webpage that describes NASA's Satellite Servicing Capabilities Office's Notional Robotic Servicing Mission, which my story discusses, specifically mentions costs. But the costs it describes are those of junking a defense, communication, science, or weather monitoring satellite altogether vs servicing it with robots. That seems to imply that the cost of making and sending a satellite far outweighs the cost of servicing it with a robot. So I would bet that those high servicing costs are from sending humans.
Gus was quite the interesting speaker, George. My favorite Gus Gruff-ism was his comment at the Convair plant after he was asked to give a speech prior to his first space flight. His speech consisted of four words: "Well...do good work."
Reminds me of what Gus Grissom told the McDonnell Douglas engineers before his Mercury-Redstone launch 50 years ago (paraphrasing). "I'm going home for this weekend so don't touch anything on the spacecraft and let's launch this sucker next week." They didn't, his mission was perfect, but the exploding hatch malfunction and he almost drowned. (Someone screwed up at the MD factory.)
The other relevant example of "keeping it simple" was the the ascent engine on the lunar module: no pumps, no valves, you couldn't test it, it had to work or you were dead. It worked every time.
It's relevant to note that repairs in space often cost more (or cost a high percentage) of the original cost of the equipment). Think Hubble Space Telescope, though the scope of the original error (a bad mirror) makes this an outlier. Anyway, this means design for repairability or redundancy is or should be a requirement for space, except there's the factor that weight reduction is a higher priority and designing for redundancy by definition adds weight. So it's an insoluable technical tautology, at least in a lingustic sense. (The robot discussed in this story do provide something of a solution, a la both the COTS cost savings I commented on earlier and the lessening of the requirement for human intervention.
That is an interesting assertion about the "techies" being the source of most damage. MY guess is that those who are guilty are both overpaid and underqualified. Repairs should really be handled by a "rocket scientist" because at that distance it really is "rocket science". What I mean is that just like in the early days of our space programs, those folks sitting at the consoles in mission control knew and understood every single bit of their system. Every bit of it was in their head, so they would instantly be able to understand a problem. That is one huge difference from those who are mostly qualified to fix car stereos.
The problem that I do see as very big with robot repair workers is the lack of strength and compliance. The robot would need to have the correct wrench, an astronaut could use a channel-locks wrench and handle a fitting that was a bit off centered. ON the other hand, it certainly should be possible to create a robot that could do most repairs. OF course, it will be bigger and stronger than a minimum capabilities package, and cost a bit more as well.
Island Al, the solar arrays on the space station were designed for automatic extension and furling. Yet one of them broke during the process. The repairs executed by humans on STS120 to fix it could not have been done easily by robots. I'm hesitant to say never be done by robots.
Humans fixed it, with on-hand materials, in just a couple of hours.
The rotary joints for the solar arrays also needed repairs. Humans fixed it; a robotic repair probably could not have executed it
I'l give you the rebuttals to these human successes; when a tool bag containing grease guns for that same joint repair got away from an astronaut on STS126. Or on Apollo 16, where an astronaut's foot got caught in a cable, yanking it out at the connector and thus ruining an extrodinarily expensive experiment.
Humans can pull success from the jaws of utter defeat, and can cost incalculable damage from a simple pratfall. Overall, the successes outweigh the oops in space. I'll take a human over robot any day.
AJ2X, that's interesting input about NASA and COTS way back in the 70s. To clarify, the robot missions are for refueling and servicing once something has broken. I would think that, considering how much it costs to send either robots or humans out in space, the problems Island Al describes would be less likely to occur.
For 3D printing to make the jump from rapid prototyping to manufacturing, engineers will need to find easier ways to move products from their CAD screens to their printers.
Gigabit and PoE are two networking technologies moving ahead in tandem as industrial users power remote Ethernet devices such as IP security cameras at 1,000 Mbps over existing CAT5 cable.
New versions of BASF's Ecovio line are both compostable and designed for either injection molding or thermoforming. These combinations are becoming more common for the single-use bioplastics used in food service and food packaging applications, but are still not widely available.
From Dell / Intel® New Paradigms in Design Work Scott Hamilton, vertical market strategist for Dell Precision workstations, 5/2/2013 5
Early in my career, I worked as a draftsman and remember the days of drawing on vellum with numbered pencils and Mylar with plastic lead. This was a fun experience in the sense that I ...
I've been using workstations for more than 10 years and love finding ways to get more performance from my system. With demanding professional applications that require more power each ...
A lasting memory from my first job as an engineer in an auto assembly plant is standing on hard concrete at six in the morning, vending-machine coffee clutched in hand, listening to ...
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This radio show will show what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.
To save this item to your list of favorite Design News content so you can find it later in your Profile page, click the "Save It" button next to the item.
If you found this interesting or useful, please use the links to the services below to share it with other readers. You will need a free account with each service to share an item via that service.
Tweet This
2 
