浅海声场单模激发的自适应闭环控制
文献类型：学位论文
| 作者 | 陈剑云 |
| 学位类别 | 博士 |
| 答辩日期 | 2005 |
| 授予单位 | 中国科学院声学研究所 |
| 授予地点 | 中国科学院声学研究所 |
| 关键词 | 浅海 简正波 单模激发 自适应逆控制 |
| 其他题名 | The Adaptive Closed-Loop Control Approaches to Single Mode Excitation in the Shallow Water Acoustic Channel |
| 中文摘要 | 单模激发是基于浅海声场波导的简正波理论而提出的一种新颖的水声技术，目前尚处于理论研究和实验阶段，但它有望成为下一代浅海远程水下探测、通信、海洋环境参数研究的有力工具。单模激发的闭环控制算法是实现单模激发技术的理论核心。现有的单模激发闭环控制算法主要建立在自适应对象估计器模型的基石出之上。本文提出了一种新的基于自适应逆控制理论的单模激发算法，采用。一滤波LMS结构，以期望单模矢量作为控制指令，并引入抖动信号，通过误差抵消和误差过滤路径，自适应生成对象控制器。仿真计算结果表明提出的算法简单、有效，能很好地消除海域对象的扰动和噪声，激发预期的单模信号。建立了一套单模激发的时域波形仿真系统，它采用频域抽样和离散反傅立仆l－变换（lDFT方法）计算出多输入多输出（MIMo）信道的冲激响应矩阵，通过做发射信号与冲激响应矩阵的卷积即可获得激发出的单模信号。实验计算表明它能准确地给出单模激发的时间序列，它特别为宽带信号的单模激发提供了一套很好的分析和研究工具。对基于自适应对象估计器模型的各种单模激发算法，包括最小均方LMS算法、递推最小二乘RLS算法、Kalman算法进行了仿真计算，给出了算法的各种性能曲线，为单模激发算法的选择比较提供了基础。 |
| 英文摘要 | Single mode excitation is a new technic based on the theory of normal modes in the shallow water acoustic waveguide. It is still on the stage of research and experiment, but it would become a new powerful tool for long range detect, investigate, and communication in the shallow water. The closed-loop control algorithm for single mode excitation is very important for the technic. The algorithms in present literatures are all based on the adaptive plant estimator. A feedback control algorithm based on adaptive inverse control theory is presented in this paper. This approach introduces a e-filter structure, using the desired single mode vector and white disturbance as input, trying to attain an ideal controller by means of the special error filter and error elimination paths. The results of simulation calculation show that the algorithm is simple, effective, and can eliminate plant disturbance and noise efficiently to excite the desired single mode. A time -domain simulation system for single mode excitation is constructed. This system uses frequency sample and IDFT methods to get the multi-input multi-output (MIMO) impulse respond matrix, then does convolution with input signals vectors and the matrix to obtain the excited single mode time domain signals. Experiments show that it can excited single mode signals accurately. This simulation system would be a good tool for exciting and analyzing single mode signals especially to wideband signals. Many calculation experiments are done for single mode excitation algorithms based on the adaptive plant estimator, including LMS, RLS and Kalman. The resulted performance curves and data can be used as reference for comparing different algorithms. |
| 语种 | 中文 |
| 公开日期 | 2011-05-07 |
| 页码 | 103 |
| 源URL | [http://159.226.59.140/handle/311008/1040]  |
| 专题 | 声学研究所_声学所博硕士学位论文_1981-2009博硕士学位论文 |
| 推荐引用方式 GB/T 7714 | 陈剑云. 浅海声场单模激发的自适应闭环控制[D]. 中国科学院声学研究所. 中国科学院声学研究所. 2005. |
入库方式： OAI收割
来源：声学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。