1.郑州大学 机械与动力工程学院, 河南 郑州 450001
张强(1994— ),男,河南驻马店人,硕士研究生,主要研究方向为多学科多领域仿真。
秦东晨(1965— ),男,河南焦作人,博士生导师,主要研究方向为机械结构与多学科优化设计、数字化设计、多学科多领域仿真。
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张强,秦东晨,朱强等.基于神经网络-牛顿混合算法的盾构机掘进位姿求解研究[J].机械传动,2021,45(07):24-29.
Zhang Qiang,Qin Dongchen,Zhu Qiang,et al.Research on Solving the Excavation Pose of Shield Machine based on Neural Network-Newton Hybrid Algorithm[J].Journal of Mechanical Transmission,2021,45(07):24-29.
张强,秦东晨,朱强等.基于神经网络-牛顿混合算法的盾构机掘进位姿求解研究[J].机械传动,2021,45(07):24-29. DOI: 10.16578/j.issn.1004.2539.2021.07.004.
Zhang Qiang,Qin Dongchen,Zhu Qiang,et al.Research on Solving the Excavation Pose of Shield Machine based on Neural Network-Newton Hybrid Algorithm[J].Journal of Mechanical Transmission,2021,45(07):24-29. DOI: 10.16578/j.issn.1004.2539.2021.07.004.
为了解决盾构机推进系统运动学建模及正解求解困难等问题,采用简化等效模型法,构建了盾构机推进系统简化模型,将n-SPS的盾构并联推进系统简化为4-SPS的等效并联推进机构,并构建其运动学模型。根据建立的等效机构运动学模型,采用神经网络-牛顿混合算法求解盾构掘进位姿;利用神经网络的解域搜索功能,对初值进行预测并把预测结果代入牛顿迭代法进行计算求解,分析比较了单一神经网络预测值与BP神经网络-牛顿迭代混合算法计算结果的优劣性。研究发现,盾构机推进系统等效模型的建立可以大大简化运动学建模复杂度,而且利用混合算法求解运动学正解的求解精度更高,可以提高盾构机掘进位姿控制精度,从而提高掘进隧洞质量。
In order to solve the problems such as the kinematics modeling of the shield machine propulsion system and the difficulty of forward solution, the simplified equivalent model method is adopted to construct a simplified model of the shield machine propulsion system, and the parallel shield propulsion system of n-SPS is simplified to 4-SPS equivalent parallel propulsion mechanism and construct its kinematics model. According to the established equivalent mechanism kinematics model, a neural network-Newton hybrid algorithm is used to solve the shield tunneling pose, and the solution domain search function of the neural network is used to predict the initial value and substitute the prediction result into the Newton iteration method for calculation and solution. The pros and cons of the single neural network predicted value and the calculated results of the BP neural network-Newton iterative hybrid algorithm are analyzed and compared. The study found that the establishment of the equivalent model of the shield machine propulsion system can greatly simplify the complexity of kinematics modeling, and the use of hybrid algorithms to solve the kinematics positive solution has higher accuracy, which can improve the control accuracy of the shield machine excavation attitude, thereby improving the tunneling tunnel quality.
盾构机运动学正解牛顿迭代法BP神经网络等效模型
Shield machinePositive kinematics solutionNewton iteration methodBP neural networkEquivalent model
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