A Novel Fast-moving Device Driven by Hydraulic System for Aerodynamic Heating Tests

摘要

In order to avoid the measurement error brought by heating before aerodynamic heating tests in a hypersonic wind tunnel, it's essential that the testing model should be insert into the flow field quickly. This paper presents a novel fast-moving device driven by a hydraulic system which was based on gas-liquid boosting cylinder and servo proportional valve. The control system of the fast-moving device has adopted IPC centralized-control, electro-hydraulic servo, AC servo and industrial field bus technologies, so mutual independent multiple freedom motion control circuits have been built. By using the high-speed data acquisition and analog output, reading CPU work frequency etc., the control system has solved the difficult question of fast insertion and timing. A series of experimental results show the device satisfies the speed and impact requirements, which can move the testing model into the flow field quickly during aerodynamic heating tests and operate stably.