玉米田间作业车液压行驶系统设计与仿真分析

doi:10.13733/j.jcam.issn.20955553.2022.06.016

摘要/Abstract

摘要： 为解决玉米田间作业车行驶不稳定、平衡性差的问题，设计一种双泵双伺服阀控液压马达行驶系统，双泵供油可降低油路干扰，反馈式PID算法控制双伺服阀精准调整驱动轮转速以提高作业车行驶稳定性。利用AMESim软件对单、双泵两种供油方式进行仿真分析。仿真结果表明，负载恒定变速直线行驶时，单、双泵供油最大同步误差分别为2.6%、2.2%；单侧负载变化定速行驶时，单、双泵供油最大同步误差分别为16.8%、8%；单侧负载变化变速行驶时，单、双泵供油最大同步误差分别为37.76%、14.3%；负载恒定转弯时，单泵供油马达转速达到设定值较慢且有波动。在液压驱动系统试验台上对双泵双伺服阀控液压马达行驶系统在实际工况下转向和直线行驶性进行模拟。结果表明，单通道转弯时马达转速接近期望值；双通道控制直线行驶时，两组马达变化趋势相同，系统同步误差为3.06%，验证了双泵双伺服阀控制田间作业车的行驶性能是可行的。

关键词: 液压驱动, 比例伺服控制, 双泵供油, AMESim仿真

Abstract: To solve the problems of unstable drive and poor balance performance in cornfields, a dualpump and dualservo valvecontrolled driving system with a hydraulic motor was designed. Using dual pumps for fuel supply could reduce fuel intermingled interference. Besides, the dualservo valve controlled by the feedback PID algorithm enabled adjustment of the rev speed of the driving wheel precisely to improve the stableness of the operation of vehicles in working. In the study, AMESim software was employed to conduct emulation analysis on the fuel supply methods by single pump and dual pumps. The results showed that when the load was constant in straight driving with variable speed, the maximum synchronous error of a single pump was 2.6%, and that of dual pumps was 2.2%. When the unilateral load was changed in constant speed driving, the maximum synchronous errors of the single pump and dual pumps were 16.8% and 8%, respectively. When the unilateral load was changed in variable speed driving, the maximum synchronous errors of the single pump and dual pumps were 37.76% and 14.3%, respectively. In constant load but steering conditions, the speed of the motor fueled by a single pump was slow when it reached the set value and fluctuated, which verified the feasibility of the dualpump hydraulic driving system. In addition, on the hydraulic driving system tested, the actual operating conditions of steering and straightline driving utilizing the dualpump and dualservo valvecontrolled driving system with the hydraulic motor were simulated. The results showed that the motor speed was close to the expected value when steering in a single channel. In the case of dualchannel straightline driving, the two groups of motors shared the same variation trend, and the system synchronization error was 3.06%, verifying that the feasibility of the driving performance of the dualpump dualservo valvecontrolled field operation vehicles.

Key words: hydraulic drive, proportional servo control, dualpump fuel supply, AMESim simulation

中图分类号:

S224.2

张红梅, 陈博, 李康, 李顺利, 朱晨辉, 王万章. 玉米田间作业车液压行驶系统设计与仿真分析[J]. 中国农机化学报, 2022, 43(6): 119-125.

Zhang Hongmei, Chen Bo, Li Kang, Li Shunli, Zhu Chenhui, Wang Wanzhang. . Design and simulation analysis of a hydraulic driving system for cornfield trucks[J]. Journal of Chinese Agricultural Mechanization, 2022, 43(6): 119-125.

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