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首页> 外文会议>International Conference on Intelligent Human-Machine Systems and Cybernetics >Investigation on Nonlinear Speed Regulating System in a High-Pressure Common-Rail Diesel
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Investigation on Nonlinear Speed Regulating System in a High-Pressure Common-Rail Diesel

机译：高压共轨柴油机非线性调速系统研究

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摘要

Currently, the digital electronic speed regulator and electrical fuel injection system can only achieve independent control on engine speed and common-rail pressure, respectively. Aiming to enhance the control performance, this study proposed an idea of designing a control module to simultaneously control the diesel engine speed and common-rail pressure. Firstly, differential equations of the speed regulating system in a high-pressure common-rail diesel were derived, and a multi-input coupling nonlinear mathematical model was established by quadratic polynomial fitting, in which engine speed and common-rail pressure were used as state variables and fuel injection quantity and pulse width of fuel supply solenoid valve were used as input variables. Then, the established model was treated as an affine nonlinear system for further analysis, and a sliding-mode variable structure controller was developed. Finally, MATLAB simulation and bench test were performed to examine the control performance of the engine speed and common-rail pressure using PID and sliding-mode variable structure control algorithms respectively. Both simulation and bench test results revealed that the sliding-mode variable structure controller exhibited many advantages including small overshoot, fast response and strong resistance to interference.
机译：当前，数字电子调速器和电子燃油喷射系统只能分别实现对发动机转速和共轨压力的独立控制。为了提高控制性能，本研究提出了一种设计控制模块以同时控制柴油机转速和共轨压力的想法。首先，推导了高压共轨柴油机调速系统的微分方程，并通过二次多项式拟合建立了以发动机转速和共轨压力为状态的多输入耦合非线性数学模型。变量，供油电磁阀的喷油量和脉冲宽度用作输入变量。然后，将建立的模型作为仿射非线性系统进行进一步分析，并开发了滑模变结构控制器。最后，进行了MATLAB仿真和台架试验，分别使用PID和滑模可变结构控制算法来检查发动机转速和共轨压力的控制性能。仿真和基准测试结果均表明，滑模变结构控制器具有许多优点，包括过冲小，响应速度快和抗干扰能力强。

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