火星探测器协同设计与仿真案例介绍

1、CAE带你探索生命之源1火星探火星探测测器家族照片器家族照片MSL的的负载负载REMSChemCamMastCamRADDANREMOTE SENSINGMastCam (M. Malin, MSSS) - Color imaging, atmospheric opacityChemCam (R. Wiens, LANL/CNES) Chemical composition; remote micro-imagingCONTACT INSTRUMENTS (ARM) MAHLI (K. Edgett, MSSS) - Microscopic imagingAPXS (R. Gellert, U

2、. Guelph, Canada) - Chemical compositionANALYTICAL LABORATORY (ROVER BODY) SAM (P. Mahaffy, GSFC/CNES) - Chemical and isotopic composition, including organicsCheMin (D. Blake, ARC) - Mineralogy ENVIRONMENTAL CHARACTERIZATIONMARDI (M. Malin, MSSS) - Descent imageryREMS (J. Gmez-Elvira, CAB, Spain) -

3、Meteorology / UVRAD (D. Hassler, SwRI) - High-energy radiationDAN (I. Mitrofanov, IKI, Russia) - Subsurface hydrogenWheel Base:2.2 mHeight of Deck:1.1 mHeight of Mast:2.2 mMAHLIAPXSBrushDrill / SievesScoopMARDISAMCheMinMSLMERLV/Launch MassAtlas V（宇宙神5）/4000 kgDelta II/1050 kgPrime Mission1 yr. cruis

4、e/2 yrs. surface7 mo. cruise/3 mo. surfacePayload10 instruments (80 kg)5 instruments (5 kg)EDL SystemGuided entry + skycraneMPF Heritage/AirbagsHeatshield Diam.4.5 m2.65 mSurface PowerRTG at 2500 W-hr/solSolar Panels at 20 km600 m (few km actual)The data/information contained herein has been reviewe

5、d and approved for release by JPL Export Administration on the basis that this document contains no export-controlled information.MSL MER比比较较以前的着以前的着陆陆地点和地点和MSL的着的着陆陆地点地点MSL最最终终可能的着可能的着陆陆地点地点Eberswalde Crater (24S, 327E, -1.5 km) contains a clay-bearing delta formed when an ancient river deposited s

6、ediment, possibly into a lake. Gale Crater (4.5S, 137E, -4.5 km) contains a 5-km sequence of layers that vary from clay-rich materials near the bottom to sulfates at higher elevation.Mawrth Vallis (24N, 341E, -2.2 km) exposes layers within Mars surface with differing mineralogy, including at least t

7、wo kinds of clays. Holden Crater (26S, 325E, -1.9 km) has alluvial fans, flood deposits, possible lake beds, and clay-rich sediment.MSL任任务务概述概述SURFACE MISSION Prime mission is one Mars year Latitude-independent and long-lived power source 20-km range 85 kg of science payload Acquire and analyze samp

8、les of rock, soil, and atmosphere Large rover, high clearance; greater mobility than MPF, MERENTRY, DESCENT, LANDING Guided entry and controlled, powered “sky crane” descent 2025-km landing ellipse Discovery responsive for landing sites 30 latitude, 0 km elevation 1000-kg landed massCRUISE/APPROACH

9、9-10 month cruise Spinning cruise stage Arrive N. hemisphere summerLAUNCH Nov. 2011 Atlas V (541)进进入、降落和着入、降落和着陆时间陆时间表表EntryEnergy Dissipation Via: Aerodynamic Drag / Aerothermodynamic heatingVelocity Range: 12,000 mph 1,000 mphPeak Temperature : 1447 CParachute DescentEnergy Dissipation via: Aerody

10、namic DragVelocity Range: 1,000 mph 200 mphLandingEnergy Dissipation Via: DampingVelocity Range: 4 40 mph 0.0 mphPowered DescentEnergy Dissipation Via: Rocket ThrustVelocity Range: 200 mph4-40 mphEDL 概述概述 时间顺时间顺序序Cruise Stage SeparationDespin (2 rpm 0 rpm)Cruise Balance Mass JettisonEntry InterfaceE

11、+0, r = 3522.2 kmM = 2.0h = 10 km MSLPeak HeatingPeak DecelerationHeading AlignmentDeploy Supersonic ParachuteExo-atmosphericEntryTurn to Entry Attitude E-10 minEDL Overview Event Timeline (cont.)Heatshield SeparationMLE Warm-Up2000 m above MOLA areoid FlyawayRover TouchdownSupersonic ParachuteDesce

12、ntPowered DescentRadar Activation Deploy Supersonic ParachuteBackshell SeparationSky CraneCut to Four EnginesRover SeparationEntry Balance Mass JettisonM = 0.7h = 8 km MSLh = 800 m AGL航天器的装配航天器的装配环环境境巡航系巡航系统统太阳太阳热热真空真空测试测试探探测测器的穿越器的穿越机械臂的操作机械臂的操作探探测测器的器的Z轴轴振振动动探探测测器的表面器的表面热测试热测试MSL应应用用NX Design and

13、Simulation的介的介绍绍系统级的设计和配置 - parts and assembly models, drawings, WIP data management, top assembly configuration, viewing质量属性 CG determination布线 design and routing of round wire and flex系统载荷和动力学分析 - parts stress, FEM, testing运动分析 deployments, range of motion, swept volumes, interferences分离事件 clearan

14、ces, dynamics, validation tests热分析和性能 modeling, performance analysis, test predictions and correlation视角 Obscurations, FOVs发布产品 data mgmt热热分析和性能分析和性能探探测测器排器排热热系系统统模型模型MSL Solid Geometry MSL Thermal MeshMSL Fluid Mesh 基于NX实体几何模型，生成TMG所需的完整的表面系统模型为探测器生成热网格和流体网格，来表示排热系统利用Fortran用户子程序和飞行阀数据，把排热系统的逻辑阀和TM

15、G进行连接探探测测器太阳器太阳热测试热测试2102/15/2011运运动动范范围围、 、间间隙隙检测检测运运动动、干涉、干涉、间间隙隙 - SASPAH样样本交付本交付间间隙隙 NX Motion案例案例: Hardware - Portioner, SAM 1 Inlet, Far Corner, Standoff 55mm, Failure modes - Failed CHIMRA ThwackerConclusion - Turret Rotated Allows Failed Scoop and Thwacker to Clear SAM Inlets扫扫掠体掠体积积、机械臂方向、机

16、械臂方向CHIMRA Primary Portioner at SAM15mm from SAM1 Inlet to CHIMRA WG Hybrid Plate/FunnelClearance from APXS to Poker 高精度模型的精度高精度模型的精度检查检查分离事件分离事件分离事件分离事件MSL有七个主要的分离事件和三个着陆后的展开分离:Launch vehicle separation Cruise Stage separation Parachute release Heatshield separation PDV separation Rover separation

17、Rover releaseDeployments: Robotic Arm High Gain Antenna Remote Sensing Mast 分离事件Pictures show the sequence of the Powered Descent Vehicle drop out of the Backshell.The Old Days: Few events per mission, typically zero-G Discrete and deterministic energy sources Sensitivity studies, RSSd Today: Many events per mission Atmospheric conditions Indeterminate energy sources, timing Monte Carlo, swept volumes, dynamic analysisSkycrane完整的运完整的运动动跌落跌落测试测试Sky Crane完整的运完整的运动动跌落跌落测试视频测试视频JPL下一步下一步还还会如何使用会如何使用NX? 在设计审查时，无缝的集成设计和分析数据完全利用布线设计，进行虚拟的布线装配所有的机械地面支持设备干涉检查和体积扫掠都在NX/TC Eng内完成增加基于物理测试