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首页> 外文期刊>Mechatronics, IEEE/ASME Transactions on >Pressure-Based Clutch Control for Automotive Transmissions Using a Sliding-Mode Controller
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Pressure-Based Clutch Control for Automotive Transmissions Using a Sliding-Mode Controller

机译：使用滑模控制器的汽车变速器基于压力的离合器控制

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Clutch shift control is critical for efficient and high-performance transmission designs, including automatic, dual clutch, and hybrid transmissions. To ensure a smooth clutch to clutch shift, appropriate controls for two consecutive processes are critical. One is the precise coordination between the on-coming and off-going clutches, which requires the on-coming clutch to be filled and ready for engagement at the predetermined time (clutch fill). The other is the proper torque control during clutch engagement. In this paper, we will investigate the closed-loop “wet” clutch control enabled by a pressure sensor in the clutch chamber. The main challenges of the pressure-based “wet” clutch control lie in the complex nonlinear dynamics due to the interactions between the fluid and the mechanical systems, the ON/OFF behavior of the clutch assembly, the time-varying clutch loading condition, the required short time duration for a precise and robust clutch shift, and the lack of the displacement information. To enable precise and robust pressure-based control, this paper focuses on the following three aspects. First, a clutch dynamic model is constructed and validated, which precisely captures the system dynamics in a wide pressure range. Second, a sliding-mode controller is designed to achieve robust pressure control while avoiding the chattering effect. Finally, an observer is constructed to estimate the clutch piston motion, which is not only a necessary term in the nonlinear controller design but also a diagnosis tool for the clutch fill process. To validate the proposed methods, a transmission clutch fixture has been designed and built in the laboratory. The experimental results demonstrate the effectiveness and robustness of the proposed controller and observer.
机译：离合器换档控制对于高效和高性能的变速箱设计至关重要，包括自动变速箱，双离合器变速箱和混合动力变速箱。为确保离合器到离合器的平稳换挡，两个连续过程的适当控制至关重要。一种是待接合和待接合的离合器之间的精确协调，这要求待接合的离合器被填充并准备在预定时间接合（离合器填充）。另一个是离合器接合期间的适当扭矩控制。在本文中，我们将研究由离合器腔中的压力传感器启用的闭环“湿式”离合器控制。基于压力的“湿式”离合器控制的主要挑战在于，由于流体和机械系统之间的相互作用，离合器总成的开/关性能，随时间变化的离合器负载状况，复杂的非线性动力学而引起的复杂的非线性动力学。需要较短的持续时间以实现精确而可靠的离合器换档，并且缺少排量信息。为了实现基于压力的精确和鲁棒控制，本文着重于以下三个方面。首先，建立并验证离合器动态模型，该模型可以精确地捕获宽压力范围内的系统动态。其次，设计了滑模控制器以实现强大的压力控制，同时又避免了颤振的影响。最后，构造观察者以估计离合器活塞的运动，这不仅是非线性控制器设计中的必要术语，而且还是离合器填充过程的诊断工具。为了验证所提出的方法，已经在实验室中设计并制造了变速箱离合器夹具。实验结果证明了所提出的控制器和观测器的有效性和鲁棒性。

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