共查询到16条相似文献,搜索用时 93 毫秒
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遗传算法结合FLNN实现加速度传感器动态特性补偿 总被引:3,自引:0,他引:3
对加速度传感器动态性能进行分析,利用遗传算法与函数链神经网络相结合实现其动态性能补偿的方法,介绍补偿原理以及算法,给出了用遗传算法和函数链神经网络相结合建立的加速度传感器动态补偿网络的数学模型。结果表明,这种补偿模型具有精度高、有良好的鲁棒性以及动态补偿器实现简单等优点,在测试领域中有很好的应用前景。 相似文献
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基于LabVIEW设计了动态力测量仿真系统,该系统应用系统辨识和动态补偿来提高力传感器的动态性能,使之适用于动态测量。着重介绍了该系统对力传感器仿真模型进行系统辨识与动态补偿的原理、方法和步骤。仿真实验证明:通过选择合适的激励信号,该系统能够准确辨识力传感器仿真模型并提高力传感器系统的动态性能。 相似文献
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针对电化学气体传感器的动态响应延迟问题,设计了一种电化学气体传感器的动态特性测量装置,研究了气体传感器动态特性补偿及应用。为减小电化学气体传感器的动态响应时间,提出了用粒子群优化(PSO)算法对电化学气体传感器逆建模的动态补偿法,获得动态补偿滤波器模型,对电化学气体传感器的响应-恢复时间进行补偿。将补偿方法应用于研制的存储式气体浓度测试系统,测试结果表明该方法有效地改善了传感器的动态响应特性,并在响应时间上提高了3.6倍,恢复时间提高了2.8倍,具有可移植性强、易于实现的特点。 相似文献
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基于动态递归神经网络的半主动控制结构响应预测 总被引:3,自引:0,他引:3
提出了一种多输入多输出分支动态递归神经网络模型,利用梯度下降法推导了网络权值调整公式。该模型针对结构控制中结构状态变量、控制变量和外激励荷载对结构的响应有不同的影响,采用分支输入递归处理,不但结构响应预测精度好,而且大大提高了动态网络的学习和训练效率。应用该模型对线性结构和非线性结构在变阻尼控制和外荷载激励下结构的响应进行了数值仿真,表明所提的动态递归神经网络可以达到较高的预测精度。该模型为利用神 相似文献
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基于BP神经网络的传感器非线性补偿 总被引:1,自引:0,他引:1
由于传感器本身的非线性特性以及传感器在测量过程中外界环境因素的影响,使得传感器的输入输出特性呈现出非线性.讨论了BP神经网络模型在传感器非线性补偿中的应用.给出了相应的补偿方法,即采用两个相同的传感器对同一被测量进行测量,其测量结果作为神经网络模型的输入,经过补偿后的传感器具有线性的输入输出关系.采用递推预报误差算法训练神经网络,具有收敛速度快、收敛精度高的特点.试验结果表明,应用神经网络对传感器的非线性进行动态补偿是一种行之有效的方法. 相似文献
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腕力传感器动态补偿与解耦方法的研究 总被引:3,自引:1,他引:2
本文提出一种动态补偿与解耦方法,并解决了腕力传感器动态响应速度和各通道之间动态干扰这两个关键问题。推导出补偿解耦环节的设计公式,给出处理过程的步骤。分别对构造模型和传感器实验数据进行补偿与解耦。结果表明,这一新方法十分有效。 相似文献
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飞机座舱气压变化范围较大,对气体传感器产生较大影响,导致空气质量检测结果不准确,提出采用RBF神经网络进行气压补偿。首先设计试验系统;然后对HCHO、CO、CO2和NO2共4种典型的座舱空气质量检测气体传感器进行正负压试验,采集试验数据并绘制各气体的特征变化曲线;最后建立了以12个气压点和测量值为输入、期望值为输出的3层RBF神经网络模型,并对试验数据进行了误差修正补偿。结果表明:采用该RBF神经网络补偿算法,HCHO、CO、CO2、NO2气体传感器的最大相对误差分别由32.85%、28.42%、52.87%、87.18%降低到2.001%、3.668%、2.392%、12.68%,达到较好的补偿效果。 相似文献
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Adaptive control with hysteresis estimation and compensation using RFNN for piezo-actuator 总被引:1,自引:0,他引:1
Lin FJ Shieh HJ Huang PK Teng LT 《IEEE transactions on ultrasonics, ferroelectrics, and frequency control》2006,53(9):1649-1661
Because the control performance of a piezoactuator is always severely deteriorated due to hysteresis effect, an adaptive control with hysteresis estimation and compensation using recurrent fuzzy neural network (RFNN) is proposed in this study to improve the control performance of the piezo-actuator. A new hysteresis model by modifying and parameterizing the hysteresis friction model is proposed. Then, the overall dynamics of the piezo-actuator is completed by integrating the parameterized hysteresis model into a mechanical motion dynamics. Based on this developed dynamics, an adaptive control with hysteresis estimation and compensation is proposed. However, in the designed adaptive controller, the lumped uncertainty E is difficult to obtain in practical application. Therefore, a RFNN is adopted as an uncertainty observer in order to adapt the value of the lumped uncertainty E on line. And, some experimental results show that the proposed controller provides high-performance dynamic characteristics and is robust to the variations of system parameters and external load. 相似文献
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Industrial robots are widely used in various areas owing to their greater degrees of freedom (DOFs) and larger operation space compared with traditional frame movement systems involving sliding and rotational stages. However, the geometrical transfer of joint kinematic errors and the relatively weak rigidity of industrial robots compared with frame movement systems decrease their absolute kinematic accuracy, thereby limiting their further application in ultraprecision manufacturing. This imposes a stringent requirement for improving the absolute kinematic accuracy of industrial robots in terms of the position and orientation of the robot arm end. Current measurement and compensation methods for industrial robots either require expensive measuring systems, producing positioning or orientation errors, or offer low measurement accuracy. Herein, a kinematic calibration method for an industrial robot using an artifact with a hybrid spherical and ellipsoid surface is proposed. A system with submicrometric precision for measuring the position and orientation of the robot arm end is developed using laser displacement sensors. Subsequently, a novel kinematic error compensating method involving both a residual learning algorithm and a neural network is proposed to compensate for nonlinear errors. A six-layer recurrent neural network (RNN) is designed to compensate for the kinematic nonlinear errors of a six-DOF industrial robot. The results validate the feasibility of the proposed method for measuring the kinematic errors of industrial robots, and the compensation method based on the RNN improves the accuracy via parameter fitting. Experimental studies show that the measuring system and compensation method can reduce motion errors by more than 30%. The present study provides a feasible and economic approach for measuring and improving the motion accuracy of an industrial robot at the submicrometric measurement level.The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-022-00400-6 相似文献