Abstract：Load signals detected with a force measuring balance are dynamic ones when the measuring force test was conducted on a hypersonic speed integrated aircraft model in an impulse combustion wind tunnel. It is necessary to study the dynamic response features of the force measurement balance. Firstly, based on the structure and working principle of the balance, it was simplified as a system of spring, damper and continuous rod. Then, the dynamic equation of the balance was deduced with Lagrange equation. Secondly, the dynamic performance of the balance was simulated. Through computation, the balance’s output law was acquired under sine excitation loads with different frequencies and step load. Results showed that when the excitation load frequency is far from the balance’s natural frequency, the elastic mean output of the balance is taken as the force measuring result; introducing inertia compensation not only improves the accuracy of the output result of the balance, but also makes the transient deviation between output and input drop significantly, the output result of the balance can meet the requirements of transient force measurement.
吕金洲1,2，张小庆2，陈光雄1，刘伟雄2，王锋2. 基于惯性补偿的脉冲风洞测力天平瞬态研究[J]. 振动与冲击, 2018, 37(2): 216-222.
LV Jinzhou1,2, ZHANG Xiaoqing1, CHEN Guangxiong1, LIU Weixiong2, WANG Feng2. Transient simulation for dynamic output of force measuring balance in an impulse combustion wind tunnel based on inertia compensation. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(2): 216-222.
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