前馈-串级控制在电梯门控系统中的应用

针对传统电梯门控系统存在的故障频发问题,提出了一种故障自抑制控制方案.该方案基于前馈-串级控制理论,在传统的转速-电流双闭环调速系统上增加了前馈控制.介绍了电梯门控系统的总体结构及工作原理,并给出了基于TMS320LF2407A DSP芯片的电梯门控系统的硬件及软件设计方案,引入简易光电码盘实现转子位置检测,去掉了4个双稳开关,降低了成本和维护量.通过实验及现场运行,结果表明:所设计的系统降低了电梯门控机的故障率,稳定性好、精度高,满足了门控系统的性能要求.

Application of Feed Forward-Cascade Control in Control System of Elevator Door

To solve the problem of that the faults occurred frequently in conventional control system of an elevator door,a self-restraining control scheme is proposed for those faults,based on the theory of feed forward-cascade control.It means that the feed forward control is introduced in the double close-loop control system of speed and current.Describing the global structure and working principle of the control system,the system hardware configuration and design of softwares are developed with the DSP(digital signal processor) TMS320LF2407 taken as core element.A simple optoelectronic encoder is introduced in the system to detect rotor position,thus reducing 4 bistable switches to decrease cost and maintenance jobs.Testing results showed that by the control system designed the rate of door faults is reduced with high stability and precision provided to meet the requirements of control performance for elevator door.