新型三轴离心机系统构型及数学建模

传统离心机系统一般采用高速高精度单轴转台系统,进行单方向宽范围的离心加速度精确仿真.为实现现今的航空器件对其三轴通道的大法向过载仿真,提出新型三通道离心机系统.其构型是以一台由底座和3个转动框架组成的高精度三轴转动机构,通过外主轴的速度调节,内、中两框的精确位置控制实现3个方向的飞行器法向过载仿真.在此构型基础上对三轴离心机建立数学模型,进行相关的运动学分析及理论计算.由已知x,y,z方向上的过载,通过力平衡方程反解出离心机内、中框偏移的角度以及外主轴的转速.最后通过动态仿真,进一步验证新型离心机构型的正确性和有效性.

Configuration and mathematical modeling for advanced three-axis centrifuge system

The traditional centrifuge system usually uses a high speed, high precision single-axis rotator system to achieve one-way precise simulation of unidirectional centrifugal acceleration in a broad range. Nowadays, in order to realize immense three-axis normal overload of an aviation apparatus in three dimensions, an advanced three-axis centrifuge system was proposed. The high precision three-axis rotator was composed of a foundation and three rotational axes. It succeeded in simulating normal acceleration overload by regulating speed of outer axis, and precise position control of inner and middle axis. Based on the configuration above, a mathematical model of a three-axis centrifuge system was built; related kinematics simulation and theoretic calculation were analyzed. Given the three directions overload of x,y,z, offset angle of internal axis, middle axis and rotation speed of outer axis was solved inversely by means of the force-balance equation. In the end, through the analysis of dynamics simulations, correctness and effectiveness of the new centrifuge system configuration were validated further.