喷气推进实验室对勇气号现状测试-Second Test Rover Add ...

A second, lighter-weight test rover has entered the testing setup at JPL where rover team members are assessing strategy for getting Spirit out of soft soil where it is embedded on Mars. The rover team has begun using a test rover that does not carry a science payload or robotic arm, as do Spirit and Opportunity on Mars, and the primary engineering test rover at JPL. While the primary test rover's weight on Earth is greater than Spirit's weight on Mars.The testing team plans to run such comparisons both in the soft, fluffy material being used to simulate the soil at Spirit's current location and also on coarser, crushed rock that offers better traction."There is no perfect Earth analog for Spirit's current situation," said JPL's John Callas, project manager for the twin Mars Exploration Rovers. "There's less gravity on Mars, little atmosphere, and no moisture in the soil where Spirit is.The team has also made further assessments of the position of a rock underneath Spirit relative to the rover's center of gravity. Part of the strategy for getting Spirit free will be to avoid getting in a position with the center of gravity directly over a rock touching the rover.
第二，轻质材料试验火星车进入喷气推进实验室的测试安装，探测器团队成员正在评估火星车在火星上陷入软土时的策略。火星车团队已经开始在没有进行科学有效载荷条件下测试火星车，就像在火星工作的勇气号和机遇号条件一样，以及主要工程在喷气推进实验室测试。虽然火星车在地球上的重量大于在火星上的重量。测试团队计划用蓬松的材料来模拟在勇气号当前位置的土壤和碎石，提供更好的牵引力。“不可能完美地模拟勇气号在火星的情况，喷气推进实验室的火星探测漫游者主管约翰卡拉丝说。勇气号所处的地方基本没有大气，没有重力，和土壤湿度。研究小组还提出了进一步的评估，即勇气号底部岩石与其重心的相对位置。避免重心直接与岩石接触。

Mars rover team members are planning a long-duration experiment with the test rover at JPL beginning next week. This test will check whether favorable motion seen in earlier tests can be sustained to gain as much distance in the sandbox as Spirit would need to complete on Mars to escape its predicament. Based on test results, the team might begin sending driving commands to Spirit during the second week of September. Any progress by Spirit toward getting out of the soft soil where it is embedded is expected to be slow. With its right front wheel disabled since 2006, Spirit's success at getting out of the sand trap is not guaranteed. Both Spirit and Opportunity have operated on Mars more than five years longer than their initially planned missions of three months.
火星探测器团队成员正计划于下周开始在喷气推进实验室进行长时间测试，一帮助勇气号走出困境。根据实验结果，改小组可能在九月第二周对勇气号发出指令。但是对于陷入的勇气号来说，进展是缓慢的，自从06年以来，右前轮不能工作后，陷入沙地的勇气号无法保证能顺利走出沙坑，但是现在为止，两个火星探测器都运行了五年多了，比起计划中的三个月任务期，延长了很多。

Mars rover team members are planning a long-duration experiment with the test rover at JPL beginning next week. This test will check whether favorable motion seen in earlier tests can be sustained to gain as much distance in the sandbox as Spirit would need to complete on Mars to escape its predicament. Based on test results, the team might begin sending driving commands to Spirit during the second week of September. Any progress by Spirit toward getting out of the soft soil where it is embedded is expected to be slow. With its right front wheel disabled since 2006, Spirit's success at getting out of the sand trap is not guaranteed. Both Spirit and Opportunity have operated on Mars more than five years longer than their initially planned missions of three months.
火星探测器团队成员正计划于下周开始在喷气推进实验室进行长时间测试，一帮助勇气号走出困境。根据实验结果，改小组可能在九月第二周对勇气号发出指令。但是对于陷入的勇气号来说，进展是缓慢的，自从06年以来，右前轮不能工作后，陷入沙地的勇气号无法保证能顺利走出沙坑，但是现在为止，两个火星探测器都运行了五年多了，比起计划中的三个月任务期，延长了很多。

<br /><br />火星车的可靠性真是不错啊
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美国佬的设计冗余留的很大啊！另外火星上的风出乎意料的强大，使得火星车的太阳能电池板始终处于较高的可用度。当初设计只使用三个月好像主要就是因为考虑到火星尘土会使太阳能电池板失去能力。

这次起死回生的可能性太低了，其实勇气号到活到今天也算是奇迹了。

向勇气号致敬