论文部分内容阅读
748B转台是三维火控系统模拟中的重要设备。为达到满意的跟踪性能要求,我们认真地进行了传动链刚度设计与试验。 本文从转台设计实践、零部件试验等方面来介绍传动链刚度的设计计算方法、测试方法及测试结果,并对如何提高传动链刚度以改善系统性能加以研究与探讨。 传动链刚度与系统性能密切相关。传动链刚度越大,表明结构组合的谐振频率越高,有利于系统频带的提高。因伺服系统在谐振频率附近是无法工作的。一般要求谐振频率大于伺服系统带宽的3～5倍。因此提高传动链谐振频率是结构设计者的主要任务之一。 传动链刚度包括传动轴刚度、齿轮刚度、减速器各支承刚度及箱体刚度等等。而且转台各框架与传动链紧密连接着,所以框架的刚度直接影响着传动链综合刚度。 一、转台传动链刚度设计与计算 在初步完成转台结构设计之后,需进行刚度计算。若刚度未满足总体要求,则即需更改结构设计。 传动链总刚度用下式计算:
748B turntable is an important equipment in the simulation of three-dimensional fire control system. In order to achieve satisfactory tracking performance requirements, we have seriously carried out the drive chain stiffness design and testing. In this paper, the design and calculation methods, test methods and test results of transmission chain stiffness are introduced from the aspects of turntable design practice and parts testing, and the research on how to improve the stiffness of transmission chain to improve the system performance is also discussed. The rigidity of the transmission chain is closely related to the system performance. The greater the stiffness of the drive chain, indicating that the higher the resonant frequency of the structure combination is conducive to the improvement of the system frequency band. Due to the servo system near the resonant frequency is not working. Generally require the resonant frequency is greater than the servo system bandwidth of 3 to 5 times. Therefore, improving the transmission chain resonant frequency is one of the main tasks of structural designers. Transmission chain stiffness, including transmission shaft stiffness, gear stiffness, reducer support stiffness and stiffness of the box and so on. And the turret and the drive chain are closely linked to the frame, so the stiffness of the frame directly affects the overall stiffness of the drive chain. First, turntable transmission chain stiffness design and calculation After the initial completion of the turret structure design, the need for stiffness calculation. If the stiffness does not meet the overall requirements, then the need to change the structural design. The total stiffness of the drive chain is calculated using the following formula: