系留平台收放系统电控.doc
DOC格式手机打开展开
系留平台收放系统电控,摘 要系留气球作为信息平台,具有使用成本低、滞空时间长和隐身性能好等特点,近年来已成为各国研究热点。在系留气球系统中,系留平台收放系统,即绞车的性能不仅影响着整个系统的安全性和可靠性,而且影响缆绳的使用寿命和光电信号的传输性能。在现代绞车朝着缆绳长度越来越长、张力越来越大的方向发展的过程中,绞车的速度控制精度、缆绳的有...
内容介绍
此文档由会员 违规屏蔽12 发布
摘 要
系留气球作为信息平台,具有使用成本低、滞空时间长和隐身性能好等特点,近年来已成为各国研究热点。在系留气球系统中,系留平台收放系统,即绞车的性能不仅影响着整个系统的安全性和可靠性,而且影响缆绳的使用寿命和光电信号的传输性能。在现代绞车朝着缆绳长度越来越长、张力越来越大的方向发展的过程中,绞车的速度控制精度、缆绳的有效保护成为制约现代绞车发展的瓶颈。针对上述绞车遇到的问题,本文提出了一种利用变频器对交流电动机进行控制的减张力电控绞车的方案,并对矢量变频控制系统、减张力机构及恒张力系统进行了深入的理论和试验研究,进一步对系统的可靠性进行了深入的分析,具有重要的理论价值和实际工程意义。
本课题在分析电控绞车结构的基础上,进一步研究了绞车的电控系统。减张力机构的方案的提出,解决了绞车在应用过程中出现的缆绳损坏的问题,通过应用摩擦学原理,使缆绳和摩擦轮之间的摩擦力吸收掉了缆绳上的大部分张力,在缆绳缠绕到储缆筒上时缆绳上的张力能够保持在一个稳定的范围,有效的保护了缆绳。本系统所采用的变频器对储缆绞车实施了恒转矩控制,实现了储缆绞车与减张力机构的随动,保持了缆绳上所承受张力的恒定。最后,分析了绞车的可靠性,在应用可靠性指标加权分配法对绞车电控系统的可靠性指标进行分配的基础上,应用元器件计数法对绞车电控系统的可靠性进行预计,使电控绞车在设计阶段,有效判明可靠性薄弱环节,以便改进设计。
在理论研究的同时,设计了电控绞车减张力机构的试验模型,并进行了相应的试验。理论研究和试验结果均表明,应用矢量控制变频调速的减张力机构速度控制系统模型具有较好的速度稳定性及较高的速度精度;恒转矩控制的电机能与减张力机构实现随动,当系统速度调整时能及时实现跟随,实现了缆绳所受张力的恒定。
关键词:电控绞车,矢量变频控制,减张力,恒张力,可靠性
ABSTRCT
Mooring balloon as an information platform has many advantages, such as low use-cost, long hang time and good invisible properties, having become a researching focus in recent years. In the mooring balloon system, it’s the properties of retractable mooring platform, also called the properties of winch that influence not only the security and reliability of the whole system, but also the service life of the cable and transmission performance of electrooptical signal. In modern times,winch system is developing towards the direction of longer length, bigger tension, so the speed precise control and the effective protection of the cable system have been two constraint bottlenecks of it. As to the winch with the above problems, we propose a program to control AC motor with Inverter to realize electric winch system with reducing tension mechanism we also did deeper theoretical and practical research into vector frequency conversion system ,reducing tension mechanism and constant tension system .Besides, we did further analysis of the reliabilities of the system. They have great theoretical value and practical engineering significance.
Based on the analysis of the structure of this electric winch, we did a more step to research the electric system. The proposal of reducing tension mechanism program solves the problem with broken cable during the application by applying the friction theory,depending on friction force between cable and friction wheel to share the mostly tension, so that when cable wind to the reservoir winch, the tension on the rope can stay relatively stable, as a result the rope can be effectively protected. Inverter is used to control the torque and speed of the reservoir winch and the winch. The reliability of the system is analysed, based on the application of the weighted distribution method for reliability index of the electric winch system, identify the reliability of the weak links in order to improve our design effectively.
While researching on theory, we also design the models of speed control of electro-controlling winch and constant tension mechanism experiment, and the corresponding test. Theoretical and experimental results show that the application of the frequency vector control for electric winch has the advantages of fast response, simple parameter adjustment, anti-interference ability, etc., and maintain the cable tension constant.
Key Words Electric Winch, Vector Inverter Control, Tension-Reduction, Constant Tension
目 录
摘 要 I
ABSTRCT II
第一章 概论 1
1.1 绞车的发展历史及其应用 1
1.1.1 绞车的发展历史 1
1.1.2 绞车的应用 2
1.2 绞车的分类和构成 3
1.2.1 绞车的分类 3
1.2.2 绞车的构成 3
1.3 交流变频调速控制技术的发展 4
1.3.1 相位控制 4
1.3.2 VVVF控制 4
1.3.3 转差频率控制 4
1.3.4 脉宽调制(PWM)控制 4
1.3.5 矢量变换控制 5
1.3.6 磁场控制 5
1.3.7 微型计算机控制 5
1.4 新技术及发展趋势 6
1.5 论文选题意义及研究内容 7
1.5.1 本论文选题意义 7
1.5.2 本论文的主要研究内容 7
1.6 本章小结 8
第二章 收放系统总体方案的研究 9
2.1 收放系统的配置与布局 9
2.1.1 主绞车 9
2.1.2 辅助绞车 10
2.1.3 控制与监测系统 11
2.2 主绞车驱动方案的比较及选用 11
2.3 绞车电气控制系统 13
2.4 本章小结 15
第三章 矢量控制变频器系统 16
3.1 矢量变换控制问题的提出 16
3.2 矢量变换控制的基本原理 17
3.2.1 磁场作用等效 18
3.2.2 转矩作用等效 19
3.3 矢量的..
系留气球作为信息平台,具有使用成本低、滞空时间长和隐身性能好等特点,近年来已成为各国研究热点。在系留气球系统中,系留平台收放系统,即绞车的性能不仅影响着整个系统的安全性和可靠性,而且影响缆绳的使用寿命和光电信号的传输性能。在现代绞车朝着缆绳长度越来越长、张力越来越大的方向发展的过程中,绞车的速度控制精度、缆绳的有效保护成为制约现代绞车发展的瓶颈。针对上述绞车遇到的问题,本文提出了一种利用变频器对交流电动机进行控制的减张力电控绞车的方案,并对矢量变频控制系统、减张力机构及恒张力系统进行了深入的理论和试验研究,进一步对系统的可靠性进行了深入的分析,具有重要的理论价值和实际工程意义。
本课题在分析电控绞车结构的基础上,进一步研究了绞车的电控系统。减张力机构的方案的提出,解决了绞车在应用过程中出现的缆绳损坏的问题,通过应用摩擦学原理,使缆绳和摩擦轮之间的摩擦力吸收掉了缆绳上的大部分张力,在缆绳缠绕到储缆筒上时缆绳上的张力能够保持在一个稳定的范围,有效的保护了缆绳。本系统所采用的变频器对储缆绞车实施了恒转矩控制,实现了储缆绞车与减张力机构的随动,保持了缆绳上所承受张力的恒定。最后,分析了绞车的可靠性,在应用可靠性指标加权分配法对绞车电控系统的可靠性指标进行分配的基础上,应用元器件计数法对绞车电控系统的可靠性进行预计,使电控绞车在设计阶段,有效判明可靠性薄弱环节,以便改进设计。
在理论研究的同时,设计了电控绞车减张力机构的试验模型,并进行了相应的试验。理论研究和试验结果均表明,应用矢量控制变频调速的减张力机构速度控制系统模型具有较好的速度稳定性及较高的速度精度;恒转矩控制的电机能与减张力机构实现随动,当系统速度调整时能及时实现跟随,实现了缆绳所受张力的恒定。
关键词:电控绞车,矢量变频控制,减张力,恒张力,可靠性
ABSTRCT
Mooring balloon as an information platform has many advantages, such as low use-cost, long hang time and good invisible properties, having become a researching focus in recent years. In the mooring balloon system, it’s the properties of retractable mooring platform, also called the properties of winch that influence not only the security and reliability of the whole system, but also the service life of the cable and transmission performance of electrooptical signal. In modern times,winch system is developing towards the direction of longer length, bigger tension, so the speed precise control and the effective protection of the cable system have been two constraint bottlenecks of it. As to the winch with the above problems, we propose a program to control AC motor with Inverter to realize electric winch system with reducing tension mechanism we also did deeper theoretical and practical research into vector frequency conversion system ,reducing tension mechanism and constant tension system .Besides, we did further analysis of the reliabilities of the system. They have great theoretical value and practical engineering significance.
Based on the analysis of the structure of this electric winch, we did a more step to research the electric system. The proposal of reducing tension mechanism program solves the problem with broken cable during the application by applying the friction theory,depending on friction force between cable and friction wheel to share the mostly tension, so that when cable wind to the reservoir winch, the tension on the rope can stay relatively stable, as a result the rope can be effectively protected. Inverter is used to control the torque and speed of the reservoir winch and the winch. The reliability of the system is analysed, based on the application of the weighted distribution method for reliability index of the electric winch system, identify the reliability of the weak links in order to improve our design effectively.
While researching on theory, we also design the models of speed control of electro-controlling winch and constant tension mechanism experiment, and the corresponding test. Theoretical and experimental results show that the application of the frequency vector control for electric winch has the advantages of fast response, simple parameter adjustment, anti-interference ability, etc., and maintain the cable tension constant.
Key Words Electric Winch, Vector Inverter Control, Tension-Reduction, Constant Tension
目 录
摘 要 I
ABSTRCT II
第一章 概论 1
1.1 绞车的发展历史及其应用 1
1.1.1 绞车的发展历史 1
1.1.2 绞车的应用 2
1.2 绞车的分类和构成 3
1.2.1 绞车的分类 3
1.2.2 绞车的构成 3
1.3 交流变频调速控制技术的发展 4
1.3.1 相位控制 4
1.3.2 VVVF控制 4
1.3.3 转差频率控制 4
1.3.4 脉宽调制(PWM)控制 4
1.3.5 矢量变换控制 5
1.3.6 磁场控制 5
1.3.7 微型计算机控制 5
1.4 新技术及发展趋势 6
1.5 论文选题意义及研究内容 7
1.5.1 本论文选题意义 7
1.5.2 本论文的主要研究内容 7
1.6 本章小结 8
第二章 收放系统总体方案的研究 9
2.1 收放系统的配置与布局 9
2.1.1 主绞车 9
2.1.2 辅助绞车 10
2.1.3 控制与监测系统 11
2.2 主绞车驱动方案的比较及选用 11
2.3 绞车电气控制系统 13
2.4 本章小结 15
第三章 矢量控制变频器系统 16
3.1 矢量变换控制问题的提出 16
3.2 矢量变换控制的基本原理 17
3.2.1 磁场作用等效 18
3.2.2 转矩作用等效 19
3.3 矢量的..