A dual-mode integration framework and application to agile feedback design of launch vehicles

In recent decades,the design of complex systems like launch vehicles in the aerospace industry has presented engineers with challenges that go beyond system complexity.Issues such as time-to-market pressures and intricate industrial processes have underscored the increasing significance of agile design methodologies.Agile design is derived from the simplification of the design process and enhancing cross-domain data transmission and feedback.While methods based on model-based system engineering have improved iteration times in system architecture design,challenges persist in cross-domain data transmission.Due to the diversity of complex system models and data,a single-mode integration method is difficult to realize the data link construction of all tools used.To address this challenge,this paper proposes a dualmode data integration framework with expansibility,universality,and cost-efficiency which leverages the benefits of Remote Procedure Call and Intermediate Exchange Module,addressing the challenge of constructing cross-domain data links under single-mode integration.In this study,two critical requirements of the first-and second-stage separation systems,namely,weight and minimum separation gap,are selected for data feedback.A Modelica-based multiphysics simulation model is developed in MWorks;visualization and computation of the minimum gap are carried out in CoppeliaSim.To bridge the gap between domain-specific tools,Matlab and Functional Mock-up Unit modules are introduced as middleware,facilitating data feedback linkage.The entire simulation process is orchestrated using activity diagrams in the MagicDraw tool.The study delves into the influence of critical design parameters,such as the initial angular velocity of separation and the thrust of the retro rocket,on the minimum separation gap.It provides an analysis of minimum separation gap variations under uncertain operating conditions and examines design margins.Significantly,the paper highlights the significance of controlling the initial angular velocity during separation and the reliability of the retro rocket,providing essential decision supports and valuable insights to agile the process of system design.

Wideband chaos generation based on a dual-mode microsquare laser with optical feedback

We propose and demonstrate the generation of wideband chaos based on a dual-mode microsquare semiconductor laser with optical feedback. By adjusting the dual-mode intensity ratio and the feedback strength, wideband chaos covering more than 50 GHz in the RF spectrum is achieved. The standard and effective bandwidths of the chaotic signal are 31.3 GHz and 30.7 GHz with the flatness of 8.3 dB and 6.1 dB, respectively.

Simulation and experimental characterization of a dual-mode two-section amplified feedback laser with mode separation over 100 GHz

A tunable two-section amplified feedback laser, which employs an amplifier section as the integrated feedback cavity, is designed and fabricated for dual-mode operation with mode separation of 100 GHz. Detailed simulations and experimental characterizations on the performance of the laser are presented. Promising dual-mode emission with continuous tuning range over 16 GHz（87.41–103.64 GHz） is experimentally demonstrated.

基于本体手势-触觉感知的机器手抓取

遥操作机器人为从事各种风险工作的人们提供智能和方便的支持,成为机器人人机交互领域中关键技术之一。而触觉感知及反馈技术能够很好地辅助操作者完成精细遥操作机器人抓握控制,研究触觉反馈在遥操作中的协同作用有助于提高机器人遥操作性能。在基于数据手套及触觉感知阵列的遥操作机器人控制系统下,构建了包含视觉及触觉双模态的反馈体系。采用上位机实时显示的方式解析机器人作业状态,同时构建了基于电刺激的力触觉临场感反馈模型,实现对机器人灵巧手的精准控制及抓握作业情况和握力的再现,增加操作者的本体感。针对不同的用户使用情况进行了交叉验证,实验结果表明,触觉反馈技术能够提高遥操作机器人的作业性能,同时基于视-触双模态反馈技术能够实现对触觉力的大小及遥操作机器人作业状态更优的反馈性能,实现了操作者在视觉受阻碍状况下对机器人灵巧手进行遥操作并完成稳定抓取的任务。