报道了一种采用双路高速伺服电机驱动光栅选线的方式,实现9~11μm CO2激光快速调谐输出。双光路谱线切换时间小于100μs,单光路谱线切换时间小于50 ms。激光器输出谱线达70条,其中9P(20)、9P(28)单脉冲输出能量大于100 m J,9R(30)、9P(...报道了一种采用双路高速伺服电机驱动光栅选线的方式,实现9~11μm CO2激光快速调谐输出。双光路谱线切换时间小于100μs,单光路谱线切换时间小于50 ms。激光器输出谱线达70条,其中9P(20)、9P(28)单脉冲输出能量大于100 m J,9R(30)、9P(40)单脉冲能量大于90 m J,激光脉冲宽度小于100 ns,重复频率为20 Hz。展开更多
The dynamic transmission characteristics and the sensitivities of the three stage idler gear system of the new NC power turret are studied in the paper. Considering the strongly nonlinear factors such as the periodica...The dynamic transmission characteristics and the sensitivities of the three stage idler gear system of the new NC power turret are studied in the paper. Considering the strongly nonlinear factors such as the periodically time-varying mesh stiffness, the nonlinear tooth backlash, the lump-parameter model of the gear system is developed with one rotational and two translational freedoms of each gear. The eigen-values and eigenvectors are derived and analyzed on the basis of the real modal theory. The sensitivities of natural frequencies to design parameters including supporting and meshing stiffnesses, gear masses, and moments of inertia by the direct differential method are also calculated. The results show the quantitative and qualitative impact of the parameters to the natural characteristics of the gear system. Furthermore, the periodic steady state solutions are obtained by the numerical approach based on the nonlinear model. These results are employed to gain insights into the primary controlling parameters, to forecast the severity of the dynamic response, and to assess the acceptability of the gear design.展开更多
文摘报道了一种采用双路高速伺服电机驱动光栅选线的方式,实现9~11μm CO2激光快速调谐输出。双光路谱线切换时间小于100μs,单光路谱线切换时间小于50 ms。激光器输出谱线达70条,其中9P(20)、9P(28)单脉冲输出能量大于100 m J,9R(30)、9P(40)单脉冲能量大于90 m J,激光脉冲宽度小于100 ns,重复频率为20 Hz。
文摘The dynamic transmission characteristics and the sensitivities of the three stage idler gear system of the new NC power turret are studied in the paper. Considering the strongly nonlinear factors such as the periodically time-varying mesh stiffness, the nonlinear tooth backlash, the lump-parameter model of the gear system is developed with one rotational and two translational freedoms of each gear. The eigen-values and eigenvectors are derived and analyzed on the basis of the real modal theory. The sensitivities of natural frequencies to design parameters including supporting and meshing stiffnesses, gear masses, and moments of inertia by the direct differential method are also calculated. The results show the quantitative and qualitative impact of the parameters to the natural characteristics of the gear system. Furthermore, the periodic steady state solutions are obtained by the numerical approach based on the nonlinear model. These results are employed to gain insights into the primary controlling parameters, to forecast the severity of the dynamic response, and to assess the acceptability of the gear design.
