The Open Electrical & Electronic Engineering Journal

2016, 10 : 129-140
Published online 2016 November 15. DOI: 10.2174/1874129001610010129
Publisher ID: TOEEJ-10-129

RESEARCH ARTICLE
 Research on Calibration Method for Tractor Automatic Navigation Control System

Qun Sun1, * , Shaomin Teng2 , Yongqi Du2 , Ze Kang3 , Chengqiang Yin1 and Linlin Chen1

* Address correspondence to this author at the School of Mechanical and Automotive Engineering, Liaocheng University, No.1 Road Hunan Road, Liaocheng, Shandong, China; Tel: 86-0635-8239988; E-mail:sunxiaoqun97@163.com

ABSTRACT

A lower computer control system of tractor automatic navigation based on double-antennas Beidou satellite is developed, including the controller unit, bipolar output unit, RS232 bus communication unit, a switch reset unit and the power conversion unit. To obtain a continuous voltage output, the calibration method of lower control system using least square method to fit calibration curve has been studied. The lower computer control system receives navigation angel and navigation angel offset instruction provided by the host computer through RS232 bus communication unit. Continuous voltage from -10V to +10V is output through the bipolar output unit to adjust hydraulic valves to control the tractor steering after these are processed by the lower computer.

Keywords:

Automatic navigation, Calibration, Lower control system, Least Square Method, Tractor.