电子节气门控制系统设计精编版.doc

精品资料推荐 I 电子节气门控制系统设计 精品资料推荐 I 摘 要 电子节气门产品自 20 世纪 80 年代问世以来，已逐渐应用到各种中、高级 轿车中相对于传统的机械式节气门，电子节气门系统(ETCS)能根据驾驶员的 驾驶意图以及整车行驶状况确定节气门的最佳开度，保证车辆具有最佳的动力 性和燃油经济性，并能够为怠速控制(IDL)、驱动防滑控制(ASR)和巡航控制 (CCS)等电子控制功能的实现奠定基础，从而提高安全性和乘坐舒适性同时， 对于混合动力汽车，为了实现能量的管理和分配，电子节气门也成为了必然的 选择本文对电子节气门系统进行了研究和开发，为电子节气门在混合动力轿 车上的应用奠定了基础 本文分析了电子节气门系统的工作原理、基本结构以及机械结构中存在的 非线性因素和各自的特性，如复位弹簧、气流的冲击、库伦+粘滑摩擦等测 定电子节气门的关键参数，建立了电子节气门系统的数学模型 为了适应电子节气门控制系统的快速动态特性，抑制由于电子节气门体的 非线性因素对控制特性的影响，提出了一种新的模糊 PID 复合控制策略，通过 模糊控制提高电子节气门系统的动态性能，用智能积分 PID 控制保证系统的稳 态能，利用权重因子函数改善控制切换过程。

电子节气门控制器采用飞思卡尔公司的 MC9S12DG128 单片机作为主控芯 片,同时硬件系统还包括控制器的供电电源模块、直流电机的脉宽调制驱动模块、 串行通信模块和 CAN 总线通信模块等采用 CodeWarrior 编译的程序软件，完 成了控制功能和调试功能为了对系统状态实时显示和故障报警，以及在控制 过程中进行数据采集，本文开发出基于 LabWindows/CVI 的串口通信系统 试验结果表明:模糊 PID 复合控制相对于 PID 控制和智能积分 PID 控制能够 较精确地控制节气门开度，减小超调量，瞬态误差较小，滞后时间较短所开 发的模糊 PID 复合控制器能够完成电子节气门系统的控制功能要求 关键词关键词：电子节气门；非线性；模糊 PID 复合控制策略 精品资料推荐 II Abstract Since the electronic throttle product was developed in the eighties of the twentieth Century, it has gradually been applied to high-grade automobile. Relative to the traditional mechanical throttle, the electronic throttle control system can sense the drive intention from the driver and the current situation of the auto, and then decide the correct throttles position, so that the dynamic performance and fuel economy can be improved. Furthermore, its helpful to realize some electronic control function, such as IDL, ASR and CCS, thereby the security and driving comfort can be improved. With the appearance of hybrid vehicle, electronic throttle becomes an inevitable choice for the power control and management for hybrid vehicle. In this paper,the electronic throttle control system was researched and developed, which laid the foundations of applying the ETCS to vehicle. The principle and basic structure of the electornic throttle control system(ETCS) was analyzed. The nonlinearity characteristics including nonlinear spring, aerodynamic impact, coulomb and viscous friction in the mechanical part of the throtle body was studied too. After the analysis of the ETCS, the key parameters of the throttle was measured. The numerical model of the electronic throttle control was built up. In order to adapt the swift dynamic characteristics of ETCS and restrain influence on control performance owing to nonlinearity factors of ETCS, a new Fuzzy-PID multiple compound control method is proposed. The robust dynamic characteristic of ETCS is attained by fuzzy control and the static performance is ensured by intelligent integral PID control, while switching process between two control methods is improved by using weighting factor function. The main microchip of the electrionic throttle controller is MC9S12DG128 which is manufactured by Freescale. In this paper, the power supply module, DC motors PWM drive module, serial communication module, CAN bus communication 精品资料推荐 III module and so on, was designed. The software, which is programmed with CodeWarrior software for microcontroller accomplished control, function and serial communication function.In order to display the state of the system in real time and give an alarm when malfunction occurs, serial communication system based on LabWindows/CVI was designed. The results of the experiments show that the Fuzzy-PID multiple compound control method can exactly control the throttles position, the overshoot is reduced, the transient tracking error is small and the hysteresis is short, while the PID control method and intelligent integral PID control method dont work well. So the ETCSs controller which was developed based on Fuzzy-PID control strategy can meet ETCSs function requirements. Key Words: Electronic Throttle, Nonlinearity, Fuzzy-PID Multiple Compound Control Strategy 精品资料推荐 IV 目 录 摘 要 ...............................................................................................................I ABSTRACT ......................................................................................................II 目 录..............................................................................................................IV 第 1 章 引 言....................................................................................................1 1.1 电子节气门产生的背景.............................................................................1 1.2 电子节气门在国内外的发展状况 ..............................................................2 1.2.1 电子节气门在国外的发展状况............................................................2 1.2.2 电子节气门在国内的发展状况............................................................2 1.3 电子节气门存在的问题及未来的发展趋势................................................3 1.3.1 电子节气门存在的问题.......................................................................3 1.3.2 电子节气门系统发展的趋势................................................................3 1.4 本设计主要研究工作 ................................................................................4 1.5 本章小结 ...........................................................。