A Cam Variable Assignment Method Based on High Angle of Attack Device in Low Speed Wind Tunnel
In the design and operation of the wind tunnel test device,the control quality of the multi-axis syn-chronous motion mechanism directly affects the accuracy of the model motion range and aerodynamic character-istics.Taking the tail support mechanism of 4 m × 3 m wind tunnel with high angle of attack as an example,in order to ensure the control accuracy of the equipment,the coupling relationship between the moving axes devel-opes from"one master and one slave"to"one master and multiple slaves"and"multiple masters and one slave",while the traditional electronic cam has the problem of single coupling relationship.In view of the above problems,a Cam variable assignment method based on electronic cam is proposed,which combines the trajecto-ry generation method based on polynomial calculation with the dynamic generation of key point type electronic cam table,so that the system is on longer limited to the single variable guiding control mode.The method great-ly reduces the number of switching between electronic cam,reduces the calculation load and running time of the equipment,and is suitable for the motion mechanism that needs to perform multi-axis linkage.
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维普
