基于改进WLSSVM的无人艇操纵性参数辨识

张海胜; 董早鹏; 杨莲; 张铮淇; 齐诗杰; 李家康

doi:10.11993/j.issn.2096-3920.2022-0044

基于改进WLSSVM的无人艇操纵性参数辨识

doi: 10.11993/j.issn.2096-3920.2022-0044

张海胜^{1, 2,},
董早鹏^{1, 2, ,},
杨莲³,
张铮淇^{1, 2,},
齐诗杰^{1, 2,},
李家康^{1, 2,}

1.
武汉理工大学高性能舰船技术教育部重点实验室, 湖北武汉, 430063
2.
武汉理工大学船海与能源动力工程学院, 湖北武汉, 430063
3.
中国船舶集团有限公司综合技术经济研究院, 北京, 100081

基金项目: 国家自然科学基金项目(51709214)

详细信息

作者简介:
张海胜(2000-), 男, 在读硕士, 主要研究方向为无人艇操纵性参数辨识

通讯作者:
董早鹏(1988-), 男, 博士, 副教授, 主要研究方向为船舶操纵性参数辩识、海洋无人航行器集群编队与控制

中图分类号: TJ630.33; U661.33
计量
- 文章访问数: 115
- HTML全文浏览量: 23
- PDF下载量: 19
- 被引次数: 0
出版历程
- 收稿日期: 2022-08-09
- 修回日期: 2022-09-13
- 录用日期: 2022-09-27
- 网络出版日期: 2023-10-12

Identification of Unmanned Surface Vehicle Maneuverability Parameters Based on Improved WLSSVM

ZHANG Haisheng^{1, 2
,},
DONG Zaopeng^{1, 2
, ,},
YANG Lian³,
ZHANG Zhengqi^{1, 2
,},
QI Shijie^{1, 2
,},
LI Jiakang^{1, 2
,}

1.
Key Laboratory of High Performance Ship Technology of Ministry of Education, Wuhan University of Technology, Wuhan 430063, China
2.
School of Naval Architecture, Ocean and Energy Power Engineering, Wuhan University of Technology, Wuhan 430063, China
3.
China Institute of Marine Technology & Economy, China State Shipbuilding Corporation Limited, Beijing 100081, China

摘要

摘要: 为了实现高精度的无人艇操纵运动辨识建模, 针对最小二乘支持向量机(LSSVM)辨识无人艇2阶非线性响应模型时, 部分参数会辨识不准的问题, 设计了余弦处理方法, 对辨识模型进行重构; 为进一步提高辨识精度, 在此基础上根据数据加权思想, 结合引入变异策略的自适应粒子群算法, 提出了一种可对权值寻优的加权最小二乘支持向量机(WLSSVM)算法。基于仿真数据和实船数据的辨识结果表明, 余弦方法重构后的模型很好地解决了参数辨识不准的问题, 权值寻优后的WLSSVM进行参数辨识建模具有更高的预报精度。研究结果能够为无人艇操纵运动的高精度参数辨识建模提供参考。
- 无人艇操纵运动 /
- 运动参数辨识 /
- 最小二乘支持向量机 /
- 自适应粒子群
Abstract: A cosine processing method was designed to achieve high-precision identification modeling of unmanned surface vehicle(USV) maneuvering motion and address the issue that some parameters will be inaccurately identified when the second-order nonlinear response model of USVs is identified by least square support vector machine(LSSVM). On this premise, a weighted LSSVM(WLSSVM) algorithm that could optimize the weight was proposed. The algorithm was based on the idea of data weighting and used the adaptive particle swarm optimization technique with a mutation approach. Based on simulation data and actual ship data, the identification results indicate that the model after cosine reconstruction effectively handles the problem of inaccurate parameter identification. At the same time, the WLSSVM with optimized weights has better prediction accuracy for parameter identification modeling. The research findings can serve as a reference for high-precision parameter identification modeling of USV maneuvering motion.
- unmanned surface vehicle /
- motion parameter identification /
- least squares support vector machine /
- adaptive particle swarm

HTML全文

图 1 20°/20°Z形操纵运动仿真实验数据

Figure 1. Simulation experimental data of 20°/20° zigzag maneuvering motion

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图 2 基于仿真数据的变异APSO寻优

Figure 2. Optimization of mutation APSO based on simulation data

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图 3 基于LSSVM的艏向角及艏向角速度预报

Figure 3. Prediction of bow angle and bow angular velocity based on LSSVM

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图 4 10°/10°Z形操纵运动艏向角速度仿真

Figure 4. Simulation of bow angular velocity of 10°/10° zigzag maneuvering motion

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图 5 10°回转运动艏向角速度仿真

Figure 5. Simulation of bow angular velocity of 10° rotary motion

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图 6 基于实船试验数据的变异APSO寻优

Figure 6. Optimization of mutation APSO based on actual ship test data

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图 7 实船舵角数据

Figure 7. Rudder angle data of an actual ship

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图 8 基于实船数据的艏向角及艏向角速度预报

Figure 8. Prediction of bow angle and bow angular velocity based on actual ship data

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表 1 船舶模型参数

Table 1. Ship model parameters

参数名	${T_1}$	${T_2}$	${T_3}$	K	$\;\beta $	${\delta _r}$
参数值	1.439 7	0.120 2	0.044 0	0.588 3	−0.123 9	0.009 3

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表 2 基于仿真数据的参数辨识结果

Table 2. Parameter identification results based on simulation data

参数名	真实值	原始模型+LSSVM		模型重构+LSSVM		原始模型+变异APSO-WLSSVM		模型重构+变异APSO-WLSSVM
参数名	真实值	辨识结果	相对误差/%	辨识结果	相对误差/%	辨识结果	相对误差/%	辨识结果	相对误差/%
${T_1}$	1.439 7	1.463 2	1.63	1.463 5	1.65	1.463 2	1.63	1.464 7	1.74
${T_2}$	0.120 2	0.147 7	22.88	0.147 9	23.04	0.147 7	22.88	0.147 0	22.30
${T_3}$	0.044 0	0.070 7	60.68	0.071 0	61.36	0.070 7	60.68	0.070 9	61.14
K	0.588 3	0.587 9	−0.07	0.588 1	−0.03	0.587 9	−0.07	0.588 3	0
$\beta $	−0.123 9	−0.134 6	8.64	−0.124 9	0.81	−0.134 6	8.64	−0.123 3	−0.48
${\delta _r}$	0.009 3	0	−100.00	0.009 3	0	0	−100.00	0.009 3	0

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表 3 基于仿真实验数据的辨识建模预报误差

Table 3. Prediction error of identification modeling based on simulation experimental data

名称	RMSE
名称	$ \psi $	r
原始模型+LSSVM	8.704 4	0.317 8
模型重构+LSSVM	0.208 8	0.064 5
模型重构+变异APSO-WLSSVM	0.207 0	0.064 0

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表 4 10°/10°Z形操纵运动及10°回转运动预报误差

Table 4. Prediction error of 10°/10° zigzag maneuvering motion and 10° rotary motion

名称	Z形操纵运动RMSE		回转运动RMSE
名称	$ \psi $	r	$ \psi $	r
原始模型+LSSVM	8.592 3	0.307 7	8.945 4	0.312 9
模型重构+LSSVM	0.101 9	0.039 7	0.184 9	0.009 6
模型重构+变异APSO-WLSSVM	0.101 1	0.039 4	0.137 3	0.009 0

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表 5 无人艇部分参数

Table 5. Parameters of the USV

垂线间长/m	型宽/m	吃水/m	空船质量/t
7.500	2.600	0.567	2.970

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表 6 基于实船数据的参数辨识结果

Table 6. Parameter identification results based on actual ship data

参数名	原始模型+ LSSVM	模型重构+ LSSVM	模型重构+ 变异APSO- WLSSVM
$ T_{1} $	4.227 8	4.407 6	4.304 0
$ T_{2} $	0.069 3	0.069 4	0.069 6
$ T_{3} $	0.049 2	0.038 0	0.036 6
K	0.988 7	1.018 8	0.994 1
$\beta $	9.053 5	9.884 3	9.228 0
$ \delta_{r} $	−0.000 1	0.024 3	0.012 0

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表 7 基于实船试验数据的辨识建模预报误差

Table 7. Prediction error of identification modeling based on actual ship experimental data

名称	RMSE
名称	$ \psi $	r
原始模型+LSSVM	79.472 3	1.105 9
模型重构+LSSVM	52.081 5	1.035 2
模型重构+变异APSO-WLSSVM	13.734 2	0.870 4

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