基于自动机械式变速的拖拉机定速巡航系统

Cruise control system of tractor based on automated mechanical transmission

为了将定速巡航系统应用于大型农场拖拉机轻载作业(播种和喷药等),该文以福田雷沃TG1254型拖拉机为平台,研制了一种电-液自动机械式变速装置,设计了一种油门自动调节装置,开发了基于ARM7的单片机控制系统,设计了增量式比例积分微分(PID)控制算法。并在平整水泥路面上以不同车速对设计的定速巡航系统进行试验,试验表明,所开发的定速巡航系统具有较高的可靠性和稳定性,速度控制精度在0.2m/s以内,达到定速巡航要求。该文为实现拖拉机各种车速下的定速巡航提供了硬件支持。

In order to apply a cruise control system （CCS） to the tractor with less labor intensity, such as sowing and spraying, a electro-hydraulic automated mechanical transmission （AMT） was developed, a automatic adjusting mechanism of throttle was designed, a single chip microcontroller using advanced RISC machine 7（ARM7） was exploited and incremental proportional-integral-differential control algorithm was designed based on the platform of tractor of FOTON LOVOL TG1254 in this paper. The designed CCS was tested at different speed on the concrete road, the experimental results indicated that the developed CCS run reliably and stably, the speed control accuracy was less than 0.2m/s,it meets the need of cruise control. It provides a hardware foundation for realization cruise control of tractor at different speed.