To reduce the effect of nonlinear factors and improve the tracking accuracy of the control system, a controller based on feedback linearization sliding mode control (FLSMC) method is proposed. This paper takes a variable displacement pump driven by a constant speed motor as the research object to verify the effectiveness of the designed controller. First, a high-order nonlinear model of the variable pump displacement control mechanism is established. Meanwhile, the load characteristic of the control cylinder is obtained by analyzing the swashplate control moment. Then the author uses the feedback linearization method to linearize the system model and designs a sliding mode controller to eliminate the impact of load parameter changes. Finally, the proposed FLSMC controller is used in simulation and experiment, and the PID controller is used as a comparison. Results show that the FLSMC controller can effectively improve the robustness of the pump control system.

中文翻译：

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基于FLSMC方法的变量泵排量控制器设计

为减少非线性因素的影响，提高控制系统的跟踪精度，提出了一种基于反馈线性化滑模控制（FLSMC）方法的控制器。本文以恒速电机驱动的变量泵为研究对象，验证所设计控制器的有效性。首先，建立变量泵排量控制机构的高阶非线性模型。同时，通过对斜盘控制力矩的分析，得到了控制缸的负载特性。然后作者采用反馈线性化方法对系统模型进行线性化，并设计了滑模控制器来消除负载参数变化的影响。最后，将提出的 FLSMC 控制器用于仿真和实验，PID控制器用作比较。结果表明，FLSMC控制器能有效提高泵控制系统的鲁棒性。