近日，美国宇航局（NASA）的“毅力号”火星车在其自动导航系统的帮助下，成功穿越了一片充满危险的火星地形，创造了火星探测的新纪录。这次惊险的旅程为科学家节省了几周的宝贵时间，让他们可以进行更多的科学研究。虽然毅力号任务团队通常会手动规划火星车的行驶路线，但此次名为 AutoNav 的自动导航系统表现出了非凡的能力，安全地引导“毅力号”绕过了轨道图像上看不到的岩石。6 月底，“毅力号”从东面进入了一个名为“雪峰”的布满巨石的区域，这里的岩石密度比之前遇到的任何地方的都要高。毅力号先停下来检查了两块岩石，然后在 AutoNav 的引导下，勇敢地穿越了这片区域。“毅力号”7 月底离开了“雪峰”，总共行驶了 759 米。科学家们称，毅力号火星车所行驶的距离比直线距离 520 米稍长一些，这是因为 AutoNav 在帮助“毅力号”绕过任务团队看不到的岩石。自从 1997 年美国宇航局第一辆火星车“追寻者号”（Sojourner）使用基于硅的导航器避开危险的岩石以来，自动导航器就一直保护着机器人探测器在陌生的火星地形上安全行驶。但是由于内存太小，以至于火星车每行驶 13 厘米就需要停下来重新定位周围环境。随着软件的改进，每一代访问火星的后继者都提升了这个距离。现在，“毅力号”完全不需要停下来决定下一步该去哪里，这要归功于强大的摄像头和专用于图像处理的计算机，它们一起帮助 AutoNav 实时规划路线。毅力号是第一辆有两个计算机大脑共同工作、能够即时做出决定的火星车。这些编程好的大脑还帮助毅力号在火星上创造了之前的一个纪录 —— 在杰泽罗陨石坑（Jezero Crater）行驶了 699.9 米，这是没有人类审查的最长行驶距离。本月早些时候，“毅力号”开始了它的第四次科学活动，探索了杰泽罗陨石坑西缘的内部区域，这里似乎富含碳酸盐，可能会揭示更多关于火星上可能存在过的古代微生物生命的信息。根据轨道飞行器收集的数据，这个区域也充满了破碎的岩石、高坡和火星沙丘。
英文标题：NASA’s Mars Rover Achieves New Record in AutoNav System, Saving Weeks of Valuable Time for Scientific Research
关键词：NASA, Mars rover, AutoNav, record, time
新闻内容：
Recently, the Mars rover \”Perseverance\” has achieved a new record in the United States National Aeronautics and Space Administration (NASA) due to its autonomous navigation system. The recent journey of the Mars rover saved several weeks of valuable time for scientists to conduct more research. Although the mission team manually plans the Mars rover’s route, the AutoNav system demonstrated exceptional capabilities in guiding the rover around obstacles that cannot be seen in the orbit image. In June, the Mars rover stopped to inspect two rocks before successfully crossing a dangerous region in the \”Snow peak\” area, which has higher rock density than any other place encountered. The Mars rover covered a distance of 759 meters in total. Scientists said that the distance traveled by the Mars rover is slightly longer than the straight distance of 520 meters due to the AutoNav system’s help in guiding the rover around obstacles that the mission team could not see. Since 1997, when the first Mars lander \”Sojourner\” used a silicon-based navigator to avoid obstacles in unfamiliar Martian terrain, the autonomous navigation system has been protecting robots in unknown Martian environments. However, due to limited memory, the Mars rover needs to stop and re-position every 13 cm. With software improvements, each subsequent Mars mission has enhanced this distance. Now, the Mars rover does not need to stop and decide where to go next, thanks to the powerful cameras and specialized image-processing computers that help AutoNav plan the route in real-time. The Mars rover is the first rover with two computer brains working together to make instantaneous decisions. These programmed brains have also helped the Mars rover create a new record in traveling 699.9 meters on the Jazero Crater, the longest distance driven by a human-reviewed mission. In recent months, the Mars rover has been conducting its fourth scientific mission, exploring the internal region of the Jazero Crater West 缘，which appears to contain a wealth of information about possible ancient microorganisms that may have existed
【来源】https://www.ithome.com/0/721/793.htm
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