排序方式: 共有17条查询结果,搜索用时 15 毫秒
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Jocelyn Sabatier Serge Poullain Patrick Latteux Jean Luc Thomas Alain Oustaloup 《Nonlinear dynamics》2004,38(1-2):383-400
Robust speed control of a low damped electromechanical system with backlash is studied, controlled load angular speed being not measured. The proposed control strategy combines a Luenberger observer (load angular speed and load torque disturbance estimations) and a robust CRONE controller. The observer provides estimation of the load angular speed and of the disturbance torque applied on the load. Through the computation of only three independent parameters (as many as a PID controller), the CRONE controller permits to ensure the robust speed control of the load in spite of plant parametric variations and speed observation errors. The proposed control strategy is applied to a four mass experimental test bench. 相似文献
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针对某火控雷达俯仰同步传动机构的回差精度不能满足使用要求,经过理论分析与实践验证提出了可行的改进方案. 相似文献
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Occurrence of gear rattle in transmission systems can result in severe vibration and noise, which in applications such as automobiles is an important source of user discomfort. As a result , the reduction of the rattling noise has attracted lot of concerns. The rattling noise level is affected by several gearbox parameters, an understanding of which is essential to prevent the expensive design modifications at later stages of product development. To develop such understanding at the gearbox design stage, this paper analytically evaluates the gear parameters’ effect on the root mean square of the wheel gear acceleration under idling condition, which is known to be linearly correlated to the
rattling noise level. Therefore, this evaluation allows for an investigation of the gear parameters’ influence on the rattling noise as well. This method is then verified by comparing the analytical results with the simulation results from a dynamic model built in SIMPACK as well as previously published experimental results. Thus, the proposed analytical evaluation method can optimize the gearbox specifications at the design stage to reduce the gear rattle noise level. 相似文献
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More and more attention has been focused on effectively generating
chaos via simple physical devices. The problem of creating chaotic
attractors is considered for a class of nonlinear systems with
backlash function in this paper. By utilizing the Silnikov
heteroclinic and homoclinic theorems, some sufficient conditions are
established to guarantee that the nonlinear system has
horseshoe-type chaos. Examples and simulations are given to verify
the effectiveness of the theoretical results. 相似文献
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介绍了红外系统中自动调焦技术的基本原理,详细分析了调焦组件的机械回程间隙对传统自动调焦算法效果的影响。就此提出了不同优化方案并充分考虑了算法的适用性及稳定性。最后,通过设计实验验证了算法的可行性,实现了快速、稳定、精确的自动对焦,并将其应用于工程实践中。 相似文献
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本文从一对齿轮的齿轮副系统齿侧问隙非线性动力学问题展开研究,重点探讨了考虑行星齿轮齿侧间隙的非线性动力学的模型建立思路及方式。 相似文献
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为了研究电机输入电压和传动问隙对伺服系统带宽的影响,建立了含有齿隙伺服系统的模型,得出了伺服系统反谐振频率和谐振频率的计算公式。通过对不同电压和齿侧间隙下伺服系统的仿真,定量地给出了齿侧间隙大小和电压与该机构响应频率的对应关系。对于一个带有减速器的伺服系统,这样就能够确定满足带宽下的最大输入电压和最大传动间隙。 相似文献
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针对一类坦克炮控伺服系统,充分考虑系统中的未知齿隙非线性及摩擦非线性,将这些未知非线性的影响表示成有界扰动项与未知非线性动态项之和,借助ARC(自适应鲁棒控制)的思想设计控制器,当未知非线性动态项为零时,控制器即为自适应控制器,保持系统稳定的同时实现对参考信号的精确跟踪,而当系统存在未知非线性动态项时,控制器具有很好的鲁棒性,保持系统所有信号有界的同时实现对参考信号的误差跟踪,且跟踪误差可以由设计参数的取值设定来任意调节,与现有结果相比,控制器的设计建立在充分考虑系统未知非线性的影响之上,从而避免了简单的把未知非线性影响简单的考虑成系统"总扰动"所造成的被控系统性能的损失。 相似文献