【作者】 徐兴； 陈照章； 李仲兴； 周孔亢；

【Author】 Xu Xing1, Chen Zhaozhang1, Li Zhongxing2,Zhou Kongkang2 (1. School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 202013, China; 2. School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 202013, China)

【机构】 江苏大学电气信息工程学院； 江苏大学汽车与交通工程学院；

【摘要】 装备电子控制空气悬架(ECAS)的农用运输车,在运输过程中可设定合理的行驶高度降低农产品的损坏率,以及自动调节车身高度以便提高农用运输货物的装卸效率,结合了变质量充放气系统的热力学和车辆动力学理论,建立农用运输车的高度调节模型;为了解决车身高度调节中存在"过充"、"过放"及振荡现象,提出了变速积分的PID/PWM高度控制策略并开发了基于Freescale单片机的车身高度控制器。最后搭建模拟农用运输车的半实物台架,其高度控制试验结果表明设计的控制系统满足高度调节要求。更多还原

【Abstract】 The farm transporter with electrically controlled air suspension(ECAS) could reduce the losing of farming production by setting running height when transporting, and to improve the loading &unloading efficiency, a height modulating model was built by combining theories of thermodynamics of variable-mass charging-discharging system and vehicle kinetics. To solve such problems as "over-charging", "over-discharging" and surging, a height control strategy of variable integrator PID/PWM was proposed and its controller was developed base on the Freescale single chip. Finally the semi-physical rig was built for simulating the farm transporter with the height controller, and the testing result shows that the designed control system satisfies the requirement of height modulation.更多还原