Crane booms system is an important type of crane booms bearing parts, its mechanical properties of the normal operation of machine has direct influence.
起重机臂架系统是臂架类型起重机的重要承载部件之一，其力学特性对整机的正常运转有直接的影响。
It is shown that PLC has better performance in managing and controlling for great switch amount, improving the control system reliability for platform booms.
充分说明PLC在大规模开关量的管理和控制、提高产品的可靠性等方面具有极好的性能和优势。
The application of PLC in the control system of platform booms, the hardware and software design method of PLC control system are presented and discussed.
介绍了PLC在舞台吊杆控制系统中的应用，以及PLC控制系统的硬件和软件的设计方法。
It is found and established of the system about residual life evaluation for large cranes' booms in the thesis.
本文建立了大型履带起重机桁架臂结构寿命预测体系，并且得到了验证。
This paper presents the application of PLC to the control system for platform booms, and the designing method of PLC′s control system is discussed.
通过介绍可编程控制器（PLC）在舞台吊杆控制系统中的应用，阐述PLC控制系统硬件和软件的设计方法。
This paper presents the application of PLC to the control system for platform booms, and the designing method of PLC′s control system is discussed.
通过介绍可编程控制器（PLC）在舞台吊杆控制系统中的应用，阐述PLC控制系统硬件和软件的设计方法。
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