{"id":989,"date":"2021-03-27T15:11:34","date_gmt":"2021-03-27T14:11:34","guid":{"rendered":"https:\/\/telecomkh.info\/?p=989"},"modified":"2021-03-27T15:12:15","modified_gmt":"2021-03-27T14:12:15","slug":"battery-in-focus-computer-scientists-optimize-operation-of-nano-satellites-in-orbit","status":"publish","type":"post","link":"https:\/\/telecomkh.info\/?p=989","title":{"rendered":"Battery in focus: Computer Scientists optimize operation of nano-satellites in orbit"},"content":{"rendered":"

They are about the size of a shoebox, high-tech, and soon tens of thousands of them will be orbiting the earth \u2013 so called nano-satellites. They can, for example, take high-resolution photos of our planet, or reinforce telecommunications networks. However, these actions take energy and this resource is scarce in the compact high-tech devices<\/strong><\/p>\n

Computer scientists at Saarland University now show how the energy consumption of satellites can be planned in such a way that they always work optimally without ever overstraining their batteries. The results can be transferred to other application domains.
\n\u00abThe core of our current work is a so-called ‘scheduler’,\u00bb explains Holger Hermanns, Professor of Computer Science at Saarland University. This scheduler allows one to plan the numerous different activities that modern nano-satellites can perform, continually in advance, and to optimize them with regard to their energy consumption profile.
\nOf special note is the battery model which the Saarbr\u00fccken researchers’ planning method is based on: \u00abWe do not rely on the commonly used linear model, according to which battery charge is simply represented as a value between 100 and 0 percent,\u00bb says computer scientist Hermanns. \u00abOur scheduler uses the kinetic battery model, which can also precisely account for charge fluctuations that are inherent in every battery\u00bb. The new satellite operation method thus allows long-term activity planning and scales smoothly to entire satellite fleets.
\nThe researchers developed their new action planning tool by means of two GOMX-4 satellites from the Danish-Luxembourgish company GOMspace. Each time the satellites pass over the ground station in Denmark, they send down the telemetry data of their battery usage. Based on this data, a new action plan is calculated using the novel scheduler and then uploaded to the satellites. \u00abBy optimizing the plan each time the satellites fly over the ground station, we always ensure the best possible battery utilization,\u00bb explains Hermanns.
\nThe market for so-called LEO (low-earth orbit) satellites is growing rapidly: Today, about 2500 active miniature satellites orbit our planet. Over the next 10 years launches for about 50,000 more have already been announced. However, the novel planning approach for battery usage goes beyond this use case and can also be transferred to other areas of application, such as e-mobility, drones, or smart home devices.
\nThe researchers have published their results under the title \u00abManaging Fleets of LEO Satellites: Non-Linear, Optimal, Efficient, Scalable, Usable, Robust\u00bb at one of the largest conferences on embedded software, the \u00abInternational Conference on Embedded Software\u00bb. Besides Professor Holger Hermanns, Juan Fraire, Tobias M\u00f6mke and Gregory Stock from Saarland University participated. On behalf of the company GOMspace in Luxembourg, Fakhri Babayev and Eduardo Cruz were involved. The project is mainly financed by the European Research Council through the ERC Advanced Grant \u00abPOWVER\u00bb and the German Research Foundation DFG through the Transregional Collaborative Research Center \u00abCPEC – Center for Perspicuous Computing\u00bb. Also involved is the \u00abKey-Area Research and Development Program\u00bb of Guangdong Province in China.<\/p>\n

Above, at the photo, \u00abResearch in home office\u00bb: computer scientist Holger Hermanns shows the model of a nano-satellite. Copyright: Oliver Dietze<\/em><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

They are about the size of a shoebox, high-tech, and soon tens of thousands of them will be orbiting the earth \u2013 so called nano-satellites. They can, for example, take high-resolution photos of our planet, or reinforce telecommunications networks. However, these actions take energy and this resource is scarce in the compact high-tech devices Computer … <\/p>\n

Continue reading \u00abBattery in focus: Computer Scientists optimize operation of nano-satellites in orbit\u00bb<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":990,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[50],"tags":[],"_links":{"self":[{"href":"https:\/\/telecomkh.info\/index.php?rest_route=\/wp\/v2\/posts\/989"}],"collection":[{"href":"https:\/\/telecomkh.info\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/telecomkh.info\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/telecomkh.info\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/telecomkh.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=989"}],"version-history":[{"count":2,"href":"https:\/\/telecomkh.info\/index.php?rest_route=\/wp\/v2\/posts\/989\/revisions"}],"predecessor-version":[{"id":992,"href":"https:\/\/telecomkh.info\/index.php?rest_route=\/wp\/v2\/posts\/989\/revisions\/992"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/telecomkh.info\/index.php?rest_route=\/wp\/v2\/media\/990"}],"wp:attachment":[{"href":"https:\/\/telecomkh.info\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=989"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/telecomkh.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=989"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/telecomkh.info\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=989"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}