火星探測器協(xié)同設計與仿真案例介紹

1、CAE帶你探索生命之源1火星探火星探測測器家族照片器家族照片MSL的的負載負載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比比較較以前的著以前的著陸陸地點和地點和MSL的著的著陸陸地點地點MSL最最終終可能的著可能的著陸陸地點地點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任任務務概述概述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)進進入、降落和著入、降落和著陸時間陸時間表表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 時間順時間順序序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航天器的裝配航天器的裝配環(huán)環(huán)境境巡航系巡航系統(tǒng)統(tǒng)太陽太陽熱熱真空真空測試測試探探測測器的穿越器的穿越機械臂的操作機械臂的操作探探測測器的器的Z軸軸振振動動探探測測器的表面器的表面熱測試熱測試MSL應應用用NX Design and

13、Simulation的介的介紹紹系統(tǒng)級的設計和配置 - parts and assembly models, drawings, WIP data management, top assembly configuration, viewing質量屬性 CG determination布線 design and routing of round wire and flex系統(tǒng)載荷和動力學分析 - parts stress, FEM, testing運動分析 deployments, range of motion, swept volumes, interferences分離事件 clearan

14、ces, dynamics, validation tests熱分析和性能 modeling, performance analysis, test predictions and correlation視角 Obscurations, FOVs發(fā)布產品 data mgmt熱熱分析和性能分析和性能探探測測器排器排熱熱系系統(tǒng)統(tǒng)模型模型MSL Solid Geometry MSL Thermal MeshMSL Fluid Mesh 基于NX實體幾何模型，生成TMG所需的完整的表面系統(tǒng)模型為探測器生成熱網格和流體網格，來表示排熱系統(tǒng)利用Fortran用戶子程序和飛行閥數據，把排熱系統(tǒng)的邏輯閥和TM

15、G進行連接探探測測器太陽器太陽熱測試熱測試2102/15/2011運運動動范范圍圍、 、間間隙隙檢測檢測運運動動、干涉、干涉、間間隙隙 - SASPAH樣樣本交付本交付間間隙隙 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掃掃掠體掠體積積、機械臂方向、機

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檢查檢查分離事件分離事件分離事件分離事件MSL有七個主要的分離事件和三個著陸后的展開分離: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 分離事件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完整的運完整的運動動跌落跌落測試測試Sky Crane完整的運完整的運動動跌落跌落測試視頻測試視頻JPL下一步下一步還還會如何使用會如何使用NX? 在設計審查時，無縫的集成設計和分析數據完全利用布線設計，進行虛擬的布線裝配所有的機械地面支持設備干涉檢查和體積掃掠都在NX/TC Eng內完成增加基于物理測試