日本三菱重工业公司已制出1∶1的H-Ⅱ火箭模型。目前正在宇宙开发事业团的筑波宇宙中心进行试验,旨在验证其主要部分的振动特性、制导装置和火箭发动机安装部分的设计等。这次制成的 H-Ⅱ火箭模型,第一级发动机安装部分和第二级制导控制装载部分等四、五个部位,均使用筑波宇宙中心的试验设施进行振动试验,与设计时提出的振动方 Japan’s Mitsubishi Heavy Industries has made a 1: 1 H-Ⅱ rocket model. Experiments are currently underway at Tsukuba Cosmic Center of the Cosmos Development Group to verify the vibration characteristics of the main part, the design of the guidance device and the rocket engine mounting part, and so on. The H-Ⅱ rocket model, the first-stage engine mounting section and the second-stage pilot control loading section are all tested in the vibration test at the test facility of Tsukuba Cosmic Center at four or five sites. The vibration square