Servo control of hydraulics hasn't quite lived up to its promise in terms of widespread use of the technology. One big limitation: Its cost. In a recent Design News survey of users of hydraulics, 68% of respondents say that they would use servo if they could buy it for the same price as proportional control. Some other reasons for not servo'ing: Maintenance considerations (52%); complexity (26%); installation difficulties (19%); and filtration considerations (13%).
Researchers have been working on a number of alternative chemistries to lithium-ion for next-gen batteries, silicon-air among them. However, while the technology has been viewed as promising and cost-effective, to date researchers haven’t managed to develop a battery of this chemistry with a viable running time -- until now.
Norway-based additive manufacturing company Norsk Titanium is building what it says is the first industrial-scale 3D printing plant in the world for making aerospace-grade metal components. The New York state plant will produce 400 metric tons each year of aerospace-grade, structural titanium parts.
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