阀控空气弹簧显式动力学建模与改进模糊PID控制OA
Explicit Dynamic Modeling and Improved Fuzzy PID Control for Valve-controlled Air Springs
针对阀控空气弹簧高度伺服系统强非线性与死区振荡难题,开展动力学解耦建模与智能控制策略研究.首先,建立基于位移-质量双重回归的显式解析模型,消除 Simulink 联合仿真中的压力隐式代数环.其次,在频域内揭示流量积分与时滞耦合下的负微分镇定机理,证明负微分增益在抑制气动低频发散中的必要性.最后,针对比例阀死区与起步迟滞,设计具备非对称规则库的改进型模糊 PID 控制器.仿真结果反映:在标称载荷下,相比传统 PID,该策略显著抑制了极限环振荡,实现±0.005 mm 的稳态跟踪;在承载质量突增及硬件参数劣化(死区展宽、时滞延长)等摄动工况下,系统保持了良好的单调收敛特性.
We investigate dynamic decoupling modeling and intelligent control for valve-controlled air spring height servo systems facing strong nonlinearity and dead-zone oscillations.An explicit analytical model based on displacement-mass dual regression eliminates implicit pressure algebraic loops in Simulink co-simulations.Frequency domain analysis reveals the stabilization mechanism of negative derivative gain under coupled flow integration and time delay,proving its necessity for suppressing low-frequency divergence.Guided by these findings,an improved fuzzy PID controller with asymmetric rules addresses proportional valve dead-zones and start-up delays.Simulation results indicate that the proposed strategy significantly suppresses limit cycle oscillations and achieves steady-state tracking of±0.005 mm under nominal loads.Moreover,the system maintains monotonic convergence under adverse perturbations,including a mass increase and deteriorated hardware parameters(dead-zone widening and time delay extension).
袁枭;朱清波;夏万;杨晟
湖北工业大学 机械工程学院,湖北 武汉 430068湖北工业大学 机械工程学院,湖北 武汉 430068||海军工程大学 舰船与海洋学院,湖北 武汉 430033湖北工业大学 机械工程学院,湖北 武汉 430068湖北工业大学 机械工程学院,湖北 武汉 430068
机械制造
空气弹簧高度伺服系统显式建模负微分机理模糊PID
air springheight servo systemexplicit modelingnegative derivative mechanismfuzzy PID
《液压与气动》 2026 (6)
18-31,14
国家自然科学基金青年科学基金项目(52201389)国家自然科学基金面上项目(52471354)
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