Method for accurately synchronizing test signals of wind tunnel

• Main Authors: WU JUNQIANG, XIE JIANGYU, WANG CHUN, YI FAN, DU NING, JIANG HONG, YU WENSHAN, SUN NING, ZHANG PENG, WEI ZHI, WANG RUIBO, XIE YAN, LI PING, XUE JIANGPING, CHEN HONGTAO, TANG LIANG
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2012
• Subjects: MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention provides a method for accurately synchronizing test signals of a wind tunnel. The method comprises the following steps of: 1, measuring a delay time difference, namely changing an aircraft model arranged in the wind tunnel back and forth in an attitude angle variation region according to given velocity, acquiring data of all component output signals of a strain balance and data of output signals of an attitude angle sensor uniformly, continuously and synchronously according to a certain acquisition rate through a measurement system, transmitting into a computer, performing computational analysis on cross-correlation functions between the data of all the component output signals of the strain balance and the data of the output signals of the attitude angle sensor respectively through the computer, and solving the delay time difference between all component electrical signals of the strain balance and electrical signals of the attitude angle sensor; and 2, performing synchronous correction, namely