摘要
模型精度对仿真置信度有决定性的影响。本文综合分析了影响仿真精度的各种因素，给出了仿真模型精度验证的策略、标准、验证方案、验证技术及方法选择，重点介绍、采用了优化时间历程匹配方法，结合飞行器仿真进行模型的验证计算。结果表明，这是一种行之有效的方法。它对提高仿真模型检验置信度等级与后续模型修正提供了新思路。
Fig.1 summarizes state of art of model precision of simulation system. Fig.2 outlines all foreseen errors influencing model precision. We use eq.(4), which is well known, in conjunction with Fig.3, which is proposed by us, to achieve what we deem to be a satisfactory separation of errors. This separation function is that part of Fig.4 enclosed within dashed lines. Fig.4 shows the specific optimal time history matching method which is proposed by us. Then in a time sequence comparison with actual system test data, we make successive adjustments to reduce each dominant error at a time until the best possible system precision is achieved. Fig.5 shows big differences between measured velocities and predicted ones when separation technique is not used (Fig.4 without the part enclosed within dashed lines). Fig.6 shows good agreement between measured velocities and predicted ones when our specific optimal time history matching method is used (Fig.4).
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
1999年第2期290-294,共5页
Journal of Northwestern Polytechnical University
关键词
精度
模型验证
验模方法
飞行器
仿真系统
simulation system, model precision, optimal time history matching method
