On the Mechanical Analysis and Control for the Tension System of the Cylindrical Filament Winding

The constant winding tension can make the filament arranged in order. The stress distribution between the filament balance fully gives play to the enhancement of filament, and increases the intensive workload of the composite winding material. This paper conducts the mechanical analysis for the unwinding roller and tension measuring roller of the cylindrical winding machine so that gets the mechanical model, gives error compensation formula caused by the radius change of the yarn group in the unwinding side, designs the closed-loop control system and utilizes the dynamical- integral PID control strategy to achieve the tension control during the process of the cylindrical winding.

Design and Analysis of a Novel Tension Control Method for Winding Machine

Filament winding has emerged as the main process for carbon fiber reinforced plastic(CFRP) fabrication, and tension control plays a key role in enhancing the quality of the winding products. With the continuous improvement of prod?uct quality and e ciency, the precision of the tension control system is constantly improving. In this paper, a novel tension control method is proposed, which can regulate the fiber tension and transport speed of the winding process by governing the outputs of three di erent driven rollers(the torque of the unwind roll, the torque of the magnetic powder brake roller, and the speed of the master speed roller) in three levels. The mechanical structures and dynamic models of the driven rollers and idle rollers are established by considering the time?varying features of the roller radius and inertia. Moreover, the influence of parameters and speed variation on fiber tension is investigated using the increment model. Subsequently, the control method is proposed by applying fiber tension in three levels accord?ing to the features of the three driven rollers. An adaptive fuzzy controller is designed for tuning the PID parameters online to control the speed of the master speed roller. Simulation is conducted for verifying the performance and sta?bility of the proposed tension control method by comparing with those of the conventional PID control method. The result reveals that the proposed method outperforms the conventional method. Finally, an experimental platform is constructed, and the proposed system is applied to a winding machine. The performance and stability of the tension control system are demonstrated via a series of experiments using carbon fiber under di erent reference speeds and tensions. This paper proposes a novel tension control method to regulate the fiber tension and transport speed.

Variable Tension Control for Discontinuous Tape Winding of Composites Based on Constant Extension Ratio

Discontinuous tape winding, which has obvious advantages in large extension ratio winding, is widely used in the molding of composites. Therefore, the research on technological parameters becomes the focus of many scholars. However, how to accomplish the variable tension control is usually not fully considered. Accordingly, the constant extension ratio and the smoothness of winding process cannot be ensured. Aiming at the problem of tension control, this paper first gives a comparatively deep research on the control method and the interaction mechanism of tension, extension ratio, automatic lap and automatic rectification. Then, according to the winding process features, the mechanical device and the mathematical model of tension control system are established respectively. With regard to the characteristics of PID controller and fuzzy controller, the fuzzy self-tuning PID controller is designed. As a result, the variable tension control is realized during the winding and lapping process, and the constant extension ratio is guaranteed. Finally, a sample application is presented for demonstration. By presenting the variable tension control techniques for discontinuous tape winding, the constant extension ratio of tapes is achieved, the consecution and the automation degree of winding process is improved as well. Thus, the quality of wound products is guaranteed.

Precision Tension Control System Using Magnetic Particle Clutch

The control of the stability of the filament tension is one of the crucial techniques ensuring the component quality of the composite materials. The open-loop tension control system, with industrial control computer as the core, magnetic particle clutch as the actuator, equipped with compensation technique is researched and manufactured. It can assure the tension control stability of the yarn in filament winding process and increase the control precision of the whole system.

Development of PLC-based Tension Control System

Fiber winding tension is an important factor in the molding techniques of composite material which influences the quality of winding product directly, and the tension control is a key technique in fiber winding techniques. This paper introduces a closed-loop tension control system with the programmable logic controller （PLC） with function modules as its control kernel, the alternating current （AC） servo motor as execute element and the radius-following device to accomplish the real-time radius compensation. The mechanism of the tension control system is analyzed and the numerical model is set up. The compensation technique of the radius of the scroll is analyzed. Experimental results show that the system is well qualified with high control precision and high reaction speed.

Adaptive RISE Control of Winding Tension with Active Disturbance Rejection

A winding system is a time-varying system that considers complex nonlinear characteristics,and how to control the stability of the winding tension during the winding process is the primary problem that has hindered development in this field in recent years.Many nonlinear factors affect the tension in the winding process,such as friction,structured uncertainties,unstructured uncertainties,and external interference.These terms severely restrict the tension tracking performance.Existing tension control strategies are mainly based on the composite control of the tension and speed loops,and previous studies involve complex decoupling operations.Owing to the large number of calculations required for this method,it is inconvenient for practical engineering applications.To simplify the tension generation mechanism and the influence of the nonlinear characteristics of the winding system,a simpler nonlinear dynamic model of the winding tension was established.An adaptive method was applied to update the feedback gain of the continuous robust integral of the sign of the error(RISE).Furthermore,an extended state observer was used to estimate modeling errors and external disturbances.The model disturbance term can be compensated for in the designed RISE controller.The asymptotic stability of the system was proven according to the Lyapunov stability theory.Finally,a comparative analysis of the proposed nonlinear controller and several other controllers was performed.The results indicated that the control of the winding tension was significantly enhanced.

A compensating technique for precise tension control

The Paper presents the mathematical model which has been Proved to be right and tha compensating tech-nique for the Precise tension control system on a nuznerical controlled winding machine. Which has been proved to bereasonable and feasible to Pereisely coned the tension of fihannt.

Analysis for the residual prestress of composite barrel for railgun with tension winding

Based on the elastic theory of cylindrical shells and the theory of composite laminates,a prediction model for the residual prestress of the simplified round composite barrel for railgun is established.Only the fibre pretension is considered in this model.A three dimensional numerical simulation for the residual prestress in the railgun barrel is carried out,by combining the temperature differential method with the element birth and death technology.The results obtained by the two methods are compared.It reveals that the distribution trends of residual prestress are consistent.And the difference for residual prestress in the filament wound composite housing of barrel is relatively small.The same finite element method is used to analysis the residual prestress in the non-simplified composite barrels for railgun,which are under different control modes of winding tension.The results mean that the residual prestress in barrel will increase while the taper coefficient for winding is decreasing.Therefore,the sealing performance in bore is improved,but the strength of the filament wound composite housing drops.In addition,the axial and circumferential residual prestress in the filament wound composite housing with constant torque winding are close to the ones in iso-stress design for barrel.

Research on PCC Control Method for Ribbon-free Random Winding

Based on analyzing the overlap appearance of random winding, basic principles of ribbon-free random winding and parametric selections for anti-overlap are discussed. The ribbon-free random winding control system and its related hardware construction as well as its software design are introduced by applying PCC technology to high speed spinning machine of synthetic filament.

考虑张力制度影响的碳纤维缠绕容器爆破性能预测与仿真插件开发

针对缠绕张力对碳纤维缠绕容器承载性能影响规律尚不明确的问题,基于ABAQUSTM软件开发了一套用户友好、自主选择性好且高效的插件工具,能够自动化完成模型建立和相关设置工作,实现了考虑多种缠绕工艺参数的容器结构精细化建模。基于该插件工具,对碳纤维缠绕容器在不同缠绕张力制度下的爆破性能进行了参数化分析,通过爆破试验验证了数值模型的有效性。对于直径为Ф155 mm和Ф474 mm的容器,90 N-80 N-60 N和200 N-180 N-160 N逐层减小的缠绕张力制度将提高容器的爆破性能;对于20 N和30 N递减张力制度,直径Ф474 mm容器的爆破压强随着内层张力的减小逐渐降低,当张力递减幅度增加时,容器的爆破压强趋于稳定,其下降幅度由16.79%减小到3.05%。此外,容器封头段与筒身段过渡区域的应变水平最高,为碳纤维缠绕容器的薄弱位置。

高效全自动数控缠绕机的设计开发

随着新能源技术的不断发展,高压气瓶的生产需求日益增长,纤维缠绕成型技术则是生产高压气瓶过程中的一种关键技术.目前纤维缠绕技术在国内发展中依然面临着许多严峻的挑战,如由于有芯纱团自身原因导致纱线缠绕张力控制不均以及缠绕手腕运作时所需的驱动电机过多导致成本过高等问题.故该文以数控龙门式缠绕机为研究对象,设计了一种缠绕手腕装置,然后对纤维缠绕工艺进行优化,提出了一种往复式数控有芯纱团张力控制方法,并通过实验对龙门缠绕机器的性能进行验证.实验表明,经过改进后的缠绕机缠绕速度提升至150 m·min^(-1),缠绕小车运行速度提升至125 m·min^(-1).

基于PID的高速造纸机收卷部纸幅张力智能控制方法研究

收卷部纸幅张力与造纸质量之间存在决定关系。为保证高速造纸机的造纸质量,提出基于PID的高速造纸机收卷部纸幅张力智能控制方法。模拟高速造纸机收卷部工作过程,在静止和动态状态下,智能检测高速造纸机收卷部实时纸幅张力,确定高速造纸机收卷部电机参数与纸幅张力之间的关系,利用PID算法计算纸幅张力控制量,将其转换为收卷部电机控制量,生成收卷部纸幅张力控制指令,实现高速造纸机收卷部的纸幅张力智能控制。通过效果测试得出结论:综合考虑理想和干扰两种工况,与传统方法相比,优化设计方法控制下,收卷部纸幅张力的控制误差降低了3.22N。

基于柱形容器缠绕特性的控制稳定性分析

针对玻璃纤维缠绕机在工作中由于张力不稳定导致的线型变化,以及在高速缠绕模式下的张力调节不稳定的问题,设计了自适应模糊PID控制策略以及适用于高速缠绕工况的滑模控制策略。首先,针对缠绕工况建立缠绕动力学模型、张力控制模型;其次,引入模糊PID控制策略和滑模控制策略分别对不同工况下的缠绕特性进行MATLAB-Simulink仿真,寻找最优控制策略;最后,基于被验证的最优控制策略进行实验。结果表明,在模糊PID控制的调节下,不同速度变化下的缠绕张力相对于无控制得到较好改善,提高了柱形容器在缠绕时的线性稳定性和张力稳定性。模糊PID控制对缠绕时的张力调节精度优于滑模控制,为大型管道缠绕设备提供了新的研究思路。

基于计算机系统的收卷装置智能控制方法

收卷装置在纺织、造纸等行业中扮演着重要角色。随着工业4.0的发展,智能控制方法成为提高收卷质量和效率的关键。本项目采用计算机系统对收卷装置进行智能控制,通过建立数学模型、设计控制算法并进行仿真实验。结果表明,该方法能有效减少张力波动,提高收卷均匀性,并实现自适应调节。与传统控制方法相比,智能控制在收卷质量和生产效率方面均有显著提升,为相关行业的技术升级提供了新的思路。

自动络筒机的关键技术及发展趋势

为了促进自动络筒机的技术进步,分析自动络筒机高效插管、管纱高速生头及输送、高速卷绕、纱线张力闭环控制等关键技术的工作原理及应用效果,总结其发展趋势;阐明可通过CCD和视觉检测技术、管纱自动翻转和中间等待位技术提高插管速度,槽筒卷绕技术需解决高速卷绕与纱线疵点的关系以及管纱脱圈等问题,精密卷绕系统需降低摆动电机的制造成本,栅式张力控制机构和非旋转式陶瓷张力盘控制机构可解决张力部分缠回丝问题,纱线捻接技术需开发新型捻接器并提高品种适应性,固定式气圈控制器因结构简单、成本低被广泛采用,精密定长专家系统能解决非相同因素造成的长度误差修正问题,通过数字化智能化控制技术提高单锭质量可减小挡车工工作量、提高筒纱成形质量。指出:自动络筒机是智能化纺纱车间的关键设备,必须适应“无人工厂”“黑灯工厂”的发展趋势;人工智能将倒逼传统纺织制造业向柔性化、数字化、智能化方向加速转型。

Adaptive Force Control of in Web Handling Systems

Winding/unwinding system control is a very important issue to web handling machines. In this paper, a novel adaptive H∞ control strategy is developed for winding process control. A gain scheduling scheme is proposed based on a neural fuzzy approximator to improve the transient response and enhance tension control;the controller’s convergence and adaptive capability can be further improved by an efficient hybrid training algorithm. The effectiveness of the proposed adaptive H∞ control is verified by experimental tests. Test results show that the developed gain approximator can adaptively accommodate parameter variations in the system and improve the control performance.

Intelligent Winding Machine of Plastic Films for Preventing Both Wrinkles and Slippages

Flexible continuous plastic films are used to produce various products, including optical films and packaging materials, because plastic film is suited to use in mass production manufacturing processes. Generally, the web handling process is applied to convey the plastic film, which is ultimately rewound into a roll using a rewinder. In this case, wrinkles, slippage and other defects may occur if the rewinding conditions are inadequate. In this paper, the authors explain the development of a rewinder system that prevents wound roll defects—primarily starring and telescoping. The system is able to prevent such defects by optimizing the rewinding conditions of tension and nip-load. Based on the optimum design technique, the tension and nip-load are calculated using a 32-bit personal computer. Our experiments have also empirically shown that this rewinder system can prevent roll defects when applying optimized tension and nip-load. Additionally, inexperienced operators can control this system easily.

基于张力补偿的变张力控制方法研究

针对回转体构件纤维缠绕过程中纱线由出纱机构缠绕到主轴上存在的摩擦阻力及悬纱长度的变化引起落纱点处纤维张力变化的问题,提出基于张力补偿的变张力控制方法。分析纱线以任意包角经过导辊前后的张力关系,并采取测地线的缠绕理论对出纱导丝头运动轨迹进行规划,获得出纱导丝头的运动轨迹方程;建立芯模缠绕数学模型,分析芯模缠绕过程中悬纱长度对张力变化的影响,获得在不同落纱点处的张力与出纱端需要提供的张力的关系,对悬纱长度变化引起的张力波动施加补偿,从而使落纱点处张力值恒定。进行了施加张力补偿的回转体纤维缠绕实验,缠绕实验结果表明,施加张力补偿后,缠绕张力更加稳定,验证了提出的基于张力补偿的变张力控制方法能有效抑制缠绕过程中张力的波动。

基于ATV71 Controller Inside卡的卷取控制

介绍了施耐德电气最新一代变频器ATV71及其附件Controller Inside卡和相应的编程软件。同时,论述了利用这张卡开发卷取控制程序的几种方法。讨论了卷取控制的基本原理,并基于这些理论,提出了针对不同工艺要求分别采取张力开环力矩控制、张力闭环力矩控制和张力闭环速度控制这3种结构。最后,论述了如何在ATV71 Controller Inside卡上实现这3种控制结构。文中所讨论的方法均已投入实用,取得良好效果。

风电叶片多点静力测试神经网络偏差耦合控制策略

为解决风电叶片全尺寸静力加载测试中叶片参数出现变化时系统加载拉力偏离的问题,文中参照偏差耦合控制方式,通过建立基于偏差耦合控制的反向传播神经网络自整定比例积分微分控制算法,搭建基于Labview的静力测试仿真模型来验证算法的有效性。结果表明,该算法在叶片参数波动微弱情况下加载点拉力维持在较低误差;叶片参数在波动较大情况下加载点拉力出现轻微波动,但维持在符合测试标准内。由此可见,该算法有利于提高系统的鲁棒性,解决了系统拉力在参数变化时偏离的问题,提高了加载曲线的精度,增强了系统的自适应能力。