【摘要】 为了提高农业中耕管理车辆工作现场转向系统的灵活性,避免因过大转弯半径对车辆造成不可逆的损坏,设计了一种具有多种转向方式的中耕管理车,包括前轮转向方式、四轮转向方式及斜走方式;对转向系统的核心采用电液比例技术,实现对转向角度的精确控制;同时,建立了电液比例系统的数学模型,并运用AMESim软件模拟系统。在常用控制算法的基础上加入PID控制算法进行优化,在K_P=5、K_I=0. 02和K_D=0的条件下,转向控制响应更好,响应信号相对接近理想状态。更多还原

【Abstract】 In order to improve the flexibility of the steering system of the farm vehicle and avoid the irreversible damage to the vehicle due to the excessive turning radius,this paper designs a vehicle with multiple steering modes,such as the front wheel steering mode,the four wheel steering mode and the diagonal way. For the core of the steering system,the electro-hydraulic proportional technique is used to realize the precise control of the steering angle. The mathematical model of the electro-hydraulic proportional system is set up in this paper,and the AMESim software is used to simulate the system. Based on the commonly used control algorithm,PID control algorithm is added to optimize. When K_P= 5,K_I= 0. 02 and K_D= 0,the steering control response is better,and the response signal is relatively close to the ideal state.更多还原