A Load Control Strategy For Stable Operation Of Free-Piston Electromechanical Hybrid Power System

IF 1.7 4区 计算机科学 Q3 AUTOMATION & CONTROL SYSTEMS Journal of Dynamic Systems Measurement and Control-Transactions of the Asme Pub Date : 2023-10-03 DOI:10.1115/1.4063428
Bo Yang, Jian Zhang, Yuan Chenheng
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Abstract

Abstract The free-piston electromechanical hybrid power system (FEHS) affords the advantages of a simple construction and high thermal efficiency due to the removal of the crankshaft. However, the unrestricted trajectory of the piston linkage assembly (PLA) also gives rise to challenges for stable operation during the process of startup or operation. In order to realize the stable operation of free-piston electromechanical hybrid power system, this paper proposed a load control strategy. First, a dynamic model is established through thermodynamic and electromagnetic theory, and its effectiveness is verified by experiment and simulation. On this basis, a coupling load control model based on linear active disturbance rejection control (ADRC) is developed. The reliability of the proposed load control strategy is validated under different interference fluctuations. The simulation results demonstrate that no matter whether the interference occurs during the startup process or the operation process, the proposed control strategy exerts effective limiting function over the piston linkage assembly and maintain its stable operation. Moreover, compared with the proportion integral differential (PID) control strategy, the proposed strategy exhibits faster response times and a smoother startup process. The compression ratio fluctuation range was reduced from 0.1 to 0.001, and the control accuracy has been greatly improved.
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自由活塞式机电混合动力系统稳定运行的负荷控制策略
摘要:自由活塞式机电混合动力系统(FEHS)省去了曲轴,具有结构简单、热效率高等优点。然而,活塞连杆总成(PLA)在启动或运行过程中的轨迹不受限制,也给稳定运行带来了挑战。为了实现自由活塞式机电混合动力系统的稳定运行,提出了一种负荷控制策略。首先,通过热力学和电磁学理论建立了系统的动力学模型,并通过实验和仿真验证了模型的有效性。在此基础上,建立了基于线性自抗扰控制(ADRC)的耦合负荷控制模型。在不同的干扰波动下,验证了所提负荷控制策略的可靠性。仿真结果表明,无论在启动过程还是运行过程中出现干扰,所提出的控制策略都能对活塞连杆装置发挥有效的限制作用,保持其稳定运行。此外,与比例积分微分(PID)控制策略相比,该策略具有更快的响应时间和更平稳的启动过程。压缩比波动范围由0.1减小到0.001,大大提高了控制精度。
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来源期刊
CiteScore
3.90
自引率
11.80%
发文量
79
审稿时长
24.0 months
期刊介绍: The Journal of Dynamic Systems, Measurement, and Control publishes theoretical and applied original papers in the traditional areas implied by its name, as well as papers in interdisciplinary areas. Theoretical papers should present new theoretical developments and knowledge for controls of dynamical systems together with clear engineering motivation for the new theory. New theory or results that are only of mathematical interest without a clear engineering motivation or have a cursory relevance only are discouraged. "Application" is understood to include modeling, simulation of realistic systems, and corroboration of theory with emphasis on demonstrated practicality.
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