预应力自动张拉同步控制算法研究

Study on synchronization control algorithm for automatic tensioning prestress

针对梁板预应力人工张拉测量误差大、回缩值不可测、两端同步率低、缺乏可靠的过程控制手段和有效的检测评估办法等不足,对自动张拉控制系统、张拉控制过程和系统的数学模型进行了详细的研究,提出了一种基于压力同步的预应力自动张拉控制算法,并给出了具体的控制参数。研究结果表明,该自动张拉控制系统能实现压力同步的自动控制以及伸长量、压力、回缩量的自动测量和记录,并按要求自动生成各种报表;该算法实用、控制精度高,能满足梁板的预应力张拉控制要求,解决人工张拉的各种问题。实践证明,该算法控制压力同步精度可达2%。

Aiming at the problems of prestressed tensioning artificially, such as large measurement error, retraction value unmeasurable, low both ends synchronization rate, lacking of reliable means of process control and effective methods of inspection and evaluation. In order to solve these problems, the automatic tension control system, mathematical model of tensioning control processes and system were studied in detail. A prestressed automatic tensioning control algorithm based on pressure synchronization was proposed, and the specific control parameters were given. The results show that the system can achieve automatic control of pressure synchronization, and automatic measure and record of elongation, pressure, shrank back shrinkage, and generate various reports automatically as required. The algorithm is practical and high control accuracy, which can meet tension control requirements of prestressed beam and slab, and solve other problems of artificial tensioning. Practice has proved that the pressure synchronization accuracy of the algorithm is up to 2%.