随着化工行业朝着智能化方向发展,化工反应系统频繁遭受网络攻击,产生了严重的后果。现有工控安全仿真研究大多单独在网络领域进行,缺少针对化工反应系统的工控安全仿真技术。因此,针对该问题,以化工反应系统中常见的连续搅拌式反应釜(c...随着化工行业朝着智能化方向发展,化工反应系统频繁遭受网络攻击,产生了严重的后果。现有工控安全仿真研究大多单独在网络领域进行,缺少针对化工反应系统的工控安全仿真技术。因此,针对该问题,以化工反应系统中常见的连续搅拌式反应釜(continuous stirred tank reactor,CSTR)为研究对象,提出一种针对CSTR的工控安全虚实融合仿真技术。首先建立CSTR控制系统模型,提出了基于攻击类型分析、攻击仿真方法、响应分析方法与攻击监测和控制方法的工控安全虚实融合仿真技术框架,利用CSTR工控安全仿真平台,实现了针对CSTR系统的攻击模拟和响应分析,并验证了提出的针对网络攻击的监测和控制方法,为推动网络安全在化工领域内的研究提供了借鉴。展开更多
针对低空经济发展涉及的安全管理问题,在总结低空经济相关技术路线原理及落地方案的运行经验,分析低空安防普适性的4个建设方案:雷达与通感一体技术融合方案、广播式自动相关监视技术方案、远程识别技术方案和基于TDOA(time difference ...针对低空经济发展涉及的安全管理问题,在总结低空经济相关技术路线原理及落地方案的运行经验,分析低空安防普适性的4个建设方案:雷达与通感一体技术融合方案、广播式自动相关监视技术方案、远程识别技术方案和基于TDOA(time difference of arrival)无线电技术的多源融合方案的基础上,构建无人飞行器探测技术评价指标体系,并建立了一种基于决策试验评估实验室(decision-making trial and evaluation laboratory, DEMATEL)和优劣解距离法(technique for order preference by similarity to an ideal solution, TOPSIS)的多属性评价方法。结果发现,以TDOA为基础的多源融合方案是构建城市低空安防体系的有效路径和普适性方案。研究表明,低空安防体系的建设是一个系统性工程,需要政府、企业和社会各方的共同努力,在技术、数据、运营等多个层面进行整合,以适应未来低空经济的发展需求。展开更多
This paper presents a method for identification of the hydrodynamic coefficients of the dive plane of an autonomous underwater vehicle. The proposed identification method uses the governing equations of motion to esti...This paper presents a method for identification of the hydrodynamic coefficients of the dive plane of an autonomous underwater vehicle. The proposed identification method uses the governing equations of motion to estimate the coefficients of the linear damping, added mass and inertia, cross flow drag and control. Parts of data required by the proposed identification method are not measured by the onboard instruments. Hence, an optimal fusion algorithm is devised which estimates the required data accurately with a high sampling rate. To excite the dive plane dynamics and obtain the required measurements, diving maneuvers should be performed. Hence, a reliable controller with satisfactory performance and stability is needed. A cascaded controller is designed based on the coefficients obtained using a semi-empirical method and its robustness to the uncertainties is verified by the μ-analysis method. The performance and accuracy of the identification and fusion algorithms are investigated through 6-DOF numerical simulations of a realistic autonomous underwater vehicle.展开更多
文摘随着化工行业朝着智能化方向发展,化工反应系统频繁遭受网络攻击,产生了严重的后果。现有工控安全仿真研究大多单独在网络领域进行,缺少针对化工反应系统的工控安全仿真技术。因此,针对该问题,以化工反应系统中常见的连续搅拌式反应釜(continuous stirred tank reactor,CSTR)为研究对象,提出一种针对CSTR的工控安全虚实融合仿真技术。首先建立CSTR控制系统模型,提出了基于攻击类型分析、攻击仿真方法、响应分析方法与攻击监测和控制方法的工控安全虚实融合仿真技术框架,利用CSTR工控安全仿真平台,实现了针对CSTR系统的攻击模拟和响应分析,并验证了提出的针对网络攻击的监测和控制方法,为推动网络安全在化工领域内的研究提供了借鉴。
文摘针对低空经济发展涉及的安全管理问题,在总结低空经济相关技术路线原理及落地方案的运行经验,分析低空安防普适性的4个建设方案:雷达与通感一体技术融合方案、广播式自动相关监视技术方案、远程识别技术方案和基于TDOA(time difference of arrival)无线电技术的多源融合方案的基础上,构建无人飞行器探测技术评价指标体系,并建立了一种基于决策试验评估实验室(decision-making trial and evaluation laboratory, DEMATEL)和优劣解距离法(technique for order preference by similarity to an ideal solution, TOPSIS)的多属性评价方法。结果发现,以TDOA为基础的多源融合方案是构建城市低空安防体系的有效路径和普适性方案。研究表明,低空安防体系的建设是一个系统性工程,需要政府、企业和社会各方的共同努力,在技术、数据、运营等多个层面进行整合,以适应未来低空经济的发展需求。
文摘This paper presents a method for identification of the hydrodynamic coefficients of the dive plane of an autonomous underwater vehicle. The proposed identification method uses the governing equations of motion to estimate the coefficients of the linear damping, added mass and inertia, cross flow drag and control. Parts of data required by the proposed identification method are not measured by the onboard instruments. Hence, an optimal fusion algorithm is devised which estimates the required data accurately with a high sampling rate. To excite the dive plane dynamics and obtain the required measurements, diving maneuvers should be performed. Hence, a reliable controller with satisfactory performance and stability is needed. A cascaded controller is designed based on the coefficients obtained using a semi-empirical method and its robustness to the uncertainties is verified by the μ-analysis method. The performance and accuracy of the identification and fusion algorithms are investigated through 6-DOF numerical simulations of a realistic autonomous underwater vehicle.
