共查询到18条相似文献,搜索用时 171 毫秒
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电动助力转向是汽车助力转向的发展趋势,本文设计了ATMEGA16单片机控制系统,利用PWM技术、MOSFET驱动电路和MOSFET桥式电路控制转向电机电流的大小和流向,进而控制助力的大小,利用PID控制算法实现转向电机电流的反馈控制。并分别介绍了系统结构和软件流程图。实验表明该系统能够实现良好的助力。 相似文献
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<正>一、液压式和电动机械式助力转向系统的区别液压式和电动机械式助力转向系统的主要区别在于产生助力力矩的方式不同。液压转向系统的特点在于通过内燃机的皮带传动机构或电气方式驱动助力泵。助力泵在液压系统内形成用于产生转向助力的压力或体积流量。电动机械式助力转向系统(EPS)直接通过一个电机产生转向助力,电机将其力矩施加到转向柱或转向器上。因此该系统通常还需要附 相似文献
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电动助力转向是一种新型汽车动力转向技术。提出了一种微处理器采用P87C591单片机控制的汽车电动助力转向方案,系统采用闭环电流控制,利用PWM技术调节电机端电压达到控制电机电流(力矩)的目的。实验表明,该系统具有良好的电动助力转向特性。 相似文献
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汽车电动助力转向单片机的控制系统 总被引:9,自引:0,他引:9
阐述了电子控制式电动助力转向系统的工作原理和结构特点,其控制电路核心是P87LPC768单片机,采用脉宽调制(PWM)的控制方式来改变电机电枢两端的平均电压,并通过模糊控制技术达到控制电机的目的,台架试验结果表明控制系统是有效的。 相似文献
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电动助力转向系统是对传统机械转向系统的创新,操控性能好,操作轻便,转配迅速,消耗动能少,燃油经济。本文分析比较了几种常见的电动助力转向系统结构的优缺点,给出了相应的电机选择原则,并进一步做出了相应的电机控制方案。 相似文献
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Seongho Choi Dong-Woo Cho 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2001,36(1):57-72
For the control of anti-lock brake system (ABS), a longitudinal four-wheel vehicle model with brake actuator is described and a sliding mode controller with pulse width modulation (PWM) method has been developed for passenger vehicles. In our research, we introduced actuator dynamics in the system equation and derived the equivalent control input theoretically. We propose using the PWM method to compensate for the discrete nature of actuator dynamics by duty control. Stability of the PWM controller for sliding mode control (SMC) was theoretically checked. The effectiveness of the proposed control algorithms was confirmed by vehicle tests on an In-door test bench that was specially constructed for the purpose concerned. 相似文献
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Control of Wheel Slip Ratio Using Sliding Mode Controller with Pulse Width Modulation 总被引:3,自引:0,他引:3
Seongho Choi Dong-Woo Cho 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1999,32(4):267-284
For the control of anti-lock brake system (ABS), a longitudinal four-wheel vehicle model with brake actuator is described and a sliding mode controller with pulse width modulation (PWM) method has been developed for passenger vehicles. In our research, we introduce actuator dynamics of solenoid-solenoid valve type in system equation and derive the sliding mode control input theoretically. We propose using PWM method to compensate for the discrete nature of actuator dynamics by duty control. The effectiveness of the proposed control algorithms was confirmed by vehicle test on an in-door test bench that was specially constructed for the purpose concerned. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(4-5):267-284
For the control of anti-lock brake system (ABS), a longitudinal four-wheel vehicle model with brake actuator is described and a sliding mode controller with pulse width modulation (PWM) method has been developed for passenger vehicles. In our research, we introduce actuator dynamics of solenoid-solenoid valve type in system equation and derive the sliding mode control input theoretically. We propose using PWM method to compensate for the discrete nature of actuator dynamics by duty control. The effectiveness of the proposed control algorithms was confirmed by vehicle test on an in-door test bench that was specially constructed for the purpose concerned. 相似文献
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Design of a hydraulic anti-lock braking modulator and an intelligent brake pressure controller for a light motorcycle 总被引:1,自引:0,他引:1
C-Y Lu M-C Shih 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2005,43(3):217-232
The object of this paper is to design a new hydraulic modulator and an intelligent sliding mode pulse width modulation (PWM) brake pressure controller for an anti-lock braking system, for application to light motorcycles. The paper presents a design principle and a mathematical analysis of the hydraulic anti-lock braking modulator. The intelligent sliding mode PWM brake pressure controller based on vehicle acceleration is designed and tested. A three-phase pavement experiment and a rear brake influence test are undertaken to verify the performance of the controller and the modulator. A light motorcycle is built for the real vehicle anti-lock braking experiments. The experimental results show that both the intelligent controller and the hydraulic modulator designed in the study perform well in the anti-lock braking operation. 相似文献
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