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时间:2018-12-30
《飞行器制导控制半实物系统采样步长的优化设计》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、万方数据第18卷第5期2010年5月光学精密工程OpticsandPrecisionEngineeringV01.18No.5May2010文章编号1004—924X(2010)05—1144—08飞行器制导控制半实物系统采样步长的优化设计阉胜利,高慧斌,贾宏光(中国科学院长春光学精密机械与物理研究所,吉林长春130033)摘要:为了提高飞行器制导控制系统半实物仿真的仿真精度,提出通过合理选择采样步长,优化仿真实时性来协调系统计算能力与仿真精度之间关系的思想。建立了制导控制半实物仿真系统的模型,依据采
2、样控制原理推论出约束半实物仿真采样步长的主要条件。依据优化原则,建立了满足数值计算精度及稳定性的约束条件,推导出优化的采样步长。最后,对制导控制系统进行半实物仿真。系统软件采用C语言编写了飞行器的六自由度运动方程,硬件为三轴转台系统和Vxworks操作系统的嵌入式仿真机,并在转台内框加入陀螺实现稳定控制。结果表明,在优化设计的采样步长1ms下,系统的实时性能够满足制导控制仿真精度及稳定性要求。在不增加系统软硬件负担的情况下,提升了半实物系统的置信度。关键词:飞行器制导;制导控制系统;半实物仿真;实时性
3、;采样控制;六自由度仿真中图分类号:V448.2;TP391.4文献标识码:Adoi:10.3788/OPE.20101805.1144Optimaldesignofsamplingsimulationforaircraftstepsinhardware-in-loopguidanceandcontrolYINSheng—li,GAOHui—bin,JIAHong—guang(GbangchtmInstituteofOptics.Fine^&chanicsandPhysics,ChineseAcade
4、myofSciences,Cha.gchun130033,China)Abstract:ToimprovethesimulationaccuracyoftheHardware-in-loopSimulation(HILS)daguidanceandcontrolsystem,anideaisproposedtowellbalancetherelationshipbetweencalculationabilityandsimulationaccuracyofthesystembyselectingrea
5、sonablesamplingstepsandoptimizingrealtimeabilityofthesystem.AmodefortheHILSofguidanceandcontrolsystemisestablished,andtherestrainingconditionsforsamplingstepsoftheHILSarededucedaccordingtothesamplingprinciple.Furthermore,therestrainingconditionsareoptim
6、izedandtheoptimizedsamplingstepsaredeterminedtoimplementtherestrainingconditionsofcal—culationaccuracyandstability.Finally,aHILSiscarriedoutfortheguidanceandcontrolsystem.Inthesim—ulation,theaircraftsixDegree-of-freedom(6DOF)differentialequationiswritte
7、nbyCMEXS-function,andthehardwareconsistsofathreeaxisturntable,areal-timecalculatorandaflight-motion-simulator.Itiscon—eludedthattheHILscanmeettherequirementofguidanceandcontrolsystemsforthesimulationaccuracyandrealtimestabilityinanoptimizedsamplingstepo
8、f1msandcanimprovethesimulationaccuracywithoutaddinganysoftwareorhardware.。Keywords:aircraftguidance;guidanceandcontrolsystem;hardware-in-loopsimulation;samplingcon—trol:six-DOFsimulation收稿日期:2009—04—30;修订日期:2009-06-11.基金项目:中国科学院三
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