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原始的航天飞机模态试验计划是根据实尺轨道器、1/4缩尺复制品航天飞机模型的11种构型以及四体组合实尺航天飞机发射状态的3种构型的动力学而制定的。为保证这些计划的成功,建立了航天飞机模态试验与分析系统(SMTAS)。为使精度、速度、经费和进度更为先进合理,为保证系统/试验的可靠性,尝试并改进了许多方法和技术。另外,按与这些目标相一致的想法不断地改善了硬件和软件。开展了系统的革新和方法的应用研究。本文将讨论如下详细的课题: 1.复杂的四体组合航天飞机系统的模态试验方法的发展过程; 2.数据采集、计算机系统和试验方法的综合; 3.正弦一定频(dwell)模态试验成本最佳化; 4.单点正弦扫描/随机模态的确定; 5.未来的趋势。
The original space shuttle modal test program was developed based on the kinematics of the 11 configurations of the real orbital orbiter, 1/4-scale replica space shuttle model, and the 3 configurations of the 4-combined real-world space shuttle launch status of. To ensure the success of these programs, a Space Shuttle Modal Testing and Analysis System (SMTAS) was established. To make accuracy, speed, funding and schedule more advanced and reasonable, many methods and techniques have been tried and improved to ensure system / test reliability. In addition, the hardware and software are continually being improved in keeping with these goals. Carried out systematic innovation and applied research methods. This paper will discuss the following topics in detail: 1. Development of modal test methods for complex quadruple space shuttle systems; 2. Synthesis of data acquisition, computer systems, and test methods; 3. Sine-dwell modal Test cost optimization; 4. Single-point sine scan / random modal determination; 5. Future trends.