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High-efficiency inspecting method for mobile robots based on task planning for heat transfer tubes in

《机械工程前沿（英文）》 2023年第18卷第2期 doi: 10.1007/s11465-022-0741-z

摘要： Many heat transfer tubes are distributed on the tube plates of a steam generator that requires periodic inspection by robots. Existing inspection robots are usually involved in issues: Robots with manipulators need complicated installation due to their fixed base; tube mobile robots suffer from low running efficiency because of their structural restricts. Since there are thousands of tubes to be checked, task planning is essential to guarantee the precise, orderly, and efficient inspection process. Most in-service robots check the task tubes using row-by-row and column-by-column planning. This leads to unnecessary inspections, resulting in a long shutdown and affecting the regular operation of a nuclear power plant. Therefore, this paper introduces the structure and control system of a dexterous robot and proposes a task planning method. This method proceeds into three steps: task allocation, base position search, and sequence planning. To allocate the task regions, this method calculates the tool work matrix and proposes a criterion to evaluate a sub-region. And then all tasks contained in the sub-region are considered globally to search the base positions. Lastly, we apply an improved ant colony algorithm for base sequence planning and determine the inspection orders according to the planned path. We validated the optimized algorithm by conducting task planning experiments using our robot on a tube sheet. The results show that the proposed method can accomplish full task coverage with few repetitive or redundant inspections and it increases the efficiency by 33.31% compared to the traditional planning algorithms.

关键词： steam generator transfer tubes mobile robot dexterous structure task planning efficient inspection

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A novel task-oriented framework for dual-arm robotic assembly task

《机械工程前沿（英文）》 2021年第16卷第3期页码 528-545 doi: 10.1007/s11465-021-0638-2

摘要： In industrial manufacturing, the deployment of dual-arm robots in assembly tasks has become a trend. However, making the dual-arm robots more intelligent in such applications is still an open, challenging issue. This paper proposes a novel framework that combines task-oriented motion planning with visual perception to facilitate robot deployment from perception to execution and finish assembly problems by using dual-arm robots. In this framework, visual perception is first employed to track the effects of the robot behaviors and observe states of the workpieces, where the performance of tasks can be abstracted as a high-level state for intelligent reasoning. The assembly task and manipulation sequences can be obtained by analyzing and reasoning the state transition trajectory of the environment as well as the workpieces. Next, the corresponding assembly manipulation can be generated and parameterized according to the differences between adjacent states by combining with the prebuilt knowledge of the scenarios. Experiments are set up with a dual-arm robotic system (ABB YuMi and an RGB-D camera) to validate the proposed framework. Experimental results demonstrate the effectiveness of the proposed framework and the promising value of its practical application.

关键词： dual-arm assembly AI reasoning intelligent system task-oriented motion planning visual perception

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机器人任务规划：基于PDDL和ASP的任务规划系统实验比较研究 Special Feature on Intelligent Robats

Yu-qian JIANG, Shi-qi ZHANG, Piyush KHANDELWAL, Peter STONE

《信息与电子工程前沿（英文）》 2019年第20卷第3期页码 363-373 doi: 10.1631/FITEE.1800514

摘要：本文比较了目前最先进的基于规划领域定义语言（planning domain description language, PDDL）和回答集程序（answer set programming, ASP）规划器的性能

关键词：任务规划；机器人；规划领域定义语言（PDDL）；回答集程序（ASP）

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移动众包环境下基于友谊度的任务规划 Article

Yuan LIANG,Wei-feng LV,Wen-jun WU,Ke XU

《信息与电子工程前沿（英文）》 2017年第18卷第1期页码 107-121 doi: 10.1631/FITEE.1601860

摘要：最近，众包平台已吸引了大量的注册用户在线下执行特定的任务。然而，大部分现有方法仅考虑了工人和任务信息都已提前获知的情况（静态离线情景），而较少考虑到工人动态抵达的情况（动态在线情景）。因此，当工人动态抵达时，如何给工人安排适合的任务以获得其最大的满意度成为了一个具有挑战性的问题。为解决这一问题，本文提出了一种有用并且普遍的人工-任务模型，该模型不仅考虑在静态离线时给工人安排任务的情况，还同时考虑了在工人动态抵达时如何给工人安排合适的任务。在本文中，为解决静态离线情景下的任务分配问题，我们首先提出一个有效的贪心算法。由于贪心算法极易陷入局部最优，我们又加入了模拟退火法来提高贪心算法的性能。另外，为解决动态在线情景下的分配问题，我们提出了一种贪心算法。最后，在真实数据集和具有不同分布人造数据集上进行了大量实验，实验结果验证了算法的效果与性能。

关键词：移动众包；任务规划；贪心算法；模拟退火

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基于融合任务信息图神经网络的多智能体系统协同规划 Research Article

戴汉奇1,2,芦维宁2,李祥隆3,杨君1,孟德山4,刘衍泽5,梁斌1

《信息与电子工程前沿（英文）》 2022年第23卷第7期页码 1069-1076 doi: 10.1631/FITEE.2100597

摘要：协同规划是多智能体系统博弈领域的关键问题之一。本文聚焦每个智能体只有一个局部观测范围和局部通信情况下的协作规划。提出一种新型协同规划框架，该框架将图神经网络与融合任务信息采样方法相结合。本文的两个主要贡献是基于与前期工作的比较：（1）使用图采样与聚合方法（GraphSAGE）实现动态近邻智能体信息融合，这是该方法首次用于处理协同规划问题；（2）提出一种面向任务的采样方法，从特定方向聚合知识，使所提模型获得高效、稳定的训练过程。实验结果证明了所提方法的有效性。

关键词：多智能体系统；协同规划；图采样与聚合（GraphSAGE）；融合任务信息

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可佳：一种容忍环境变化的自助服务机器人 Special Feature on Intelligent Robats

Wei SHUAI, Xiao-ping CHEN

《信息与电子工程前沿（英文）》 2019年第20卷第3期页码 307-317 doi: 10.1631/FITEE.1900096

摘要：可佳是一个家庭服务机器人。硬件结构由一个可移动底盘、一个机械臂、两个相机构成；软件系统包括6个模块：感知、物体操纵、自然语言理解、运动规划、任务规划和整合决策。通过在线运行这些模块，机器人能够适应不可预知的动态环境。提出一个分层方法，将运动规划结果和神经网络结合，让机器人在执行动作时能够容忍传感器、齿轮间隙和人工干预造成的误差。在可佳机器人上验证了该方法，并让可佳在不断人为干扰下成功操纵微波炉烹饪爆米花。

关键词：机器人；任务规划；物品操纵

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支撑强国目标的中国工程科技发展战略路径谋划

“中国工程科技2035发展战略研究”总体项目组

《中国工程科学》 2017年第19卷第1期页码 27-33 doi: 10.15302/J-SSCAE-2017.01.005

摘要：

工程科技是与生产力结合最为紧密的科学技术，是实现强国目标的直接推动力。工程科技中长期发展战略研究的任务是面向“两个一百年”的强国目标，结合我国国情和发展需求，开展工程科技发展路径设计。本文探讨了我国经济社会发展与科技强国建设对工程科技创新的要求，介绍了将需求牵引与技术推动相结合开展工程科技中长期发展战略研究和路径谋划的方法体系，在愿景分析基础上，提出了面向2035年中国工程科技发展的总体思路和战略构想。

关键词： 2035年中国工程科技发展战略构想路径规划战略研究方法技术预见需求分析

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Risk evaluation for the task transfer of an aircraft maintenance program based on a multielement connection

《工程管理前沿（英文）》 doi: 10.1007/s42524-023-0282-0

摘要： This paper proposes a framework for evaluating the efficacy and suitability of maintenance programs with a focus on quantitative risk assessment in the domain of aircraft maintenance task transfer. The analysis is anchored in the principles of Maintenance Steering Group-3 (MSG-3) logic decision paradigms. The paper advances a holistic risk assessment index architecture tailored for the task transfer of maintenance programs. Utilizing the analytic network process (ANP), the study quantifies the weight interrelationships among diverse variables, incorporating expert-elicited subjective weighting. A multielement connection number-based evaluative model is employed to characterize decision-specific data, thereby facilitating the quantification of task transfer-associated risk through the appraisal of set-pair potentials. Moreover, the paper conducts a temporal risk trend analysis founded on partial connection numbers of varying orders. This analytical construct serves to streamline the process of risk assessment pertinent to maintenance program task transfer. The empirical component of this research, exemplified through a case study of the Boeing 737NG aircraft maintenance program, corroborates the methodological robustness and pragmatic applicability of the proposed framework in the quantification and analysis of mission transfer risk.

关键词： risk evaluation maintenance steering group analytic network process task transfer maintenance program

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Real-time task processing method based on edge computing for spinning CPS

Shiyong YIN, Jinsong BAO, Jie LI, Jie ZHANG

《机械工程前沿（英文）》 2019年第14卷第3期页码 320-331 doi: 10.1007/s11465-019-0542-1

摘要： Spinning production is a typical continuous manufacturing process characterized by high speed and uncertain dynamics. Each manufacturing unit in spinning production produces various real-time tasks, which may affect production efficiency and yarn quality if not processed in time. This paper presents an edge computing-based method that is different from traditional centralized cloud computation because its decentralization characteristics meet the high-speed and high-response requirements of yarn production. Edge computing nodes, real-time tasks, and edge computing resources are defined. A system model is established, and a real-time task processing method is proposed for the edge computing scenario. Experimental results indicate that the proposed real-time task processing method based on edge computing can effectively solve the delay problem of real-time task processing in spinning cyber-physical systems, save bandwidth, and enhance the security of task transmission.

关键词： edge computing real-time task scheduling CPS spinning

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A modular design kit for task-adaptable low-cost robots based on BaPaMan design

G. BORCHERT, C. L?CHTE, G. CARBONE, A. RAATZ

《机械工程前沿（英文）》 2013年第8卷第1期页码 33-41 doi: 10.1007/s11465-013-0356-5

摘要：

This paper discusses the redesign of a binary parallel manipulator named BaPaMan (Binary Actuated Parallel Manipulator). The aim of this work is the improvement of the structures stiffness of BaPaMan. Additionally this paper shows the implementation of a construction kit which allows task-adaptation of low-cost robots based on the BaPaMan structure. BaPaMan is a three degree of freedom (DOF) spatial parallel robot which comprises flexure hinges and Shape Memory Alloy (SMA) actuators to achieve a low-cost design, well suited for easy operation applications. Measurements have shown that this comes at the cost of poor structural stiffness and end effector accuracy. To counter these issues BaPaMan2 and BaPaMan3 have been developed and are elaborated within this work. During the design phase, an empirical FEA is used to improve the flexure hinge performance, which analyses relations between several design parameters and the stiffness of the entire system. Finally, task-adaptation is achieved by using a design methodology and a parametric CAD model for BaPaMan. Besides the paper introduces first applications of the BaPaMan structure and shows future work.

关键词： binary actuation flexure hinges SMA actuators low-cost design kit task-adaptation

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Sagittal SLIP-anchored task space control for a monopode robot traversing irregular terrain

Haitao YU, Haibo GAO, Liang DING, Zongquan DENG

《机械工程前沿（英文）》 2020年第15卷第2期页码 193-208 doi: 10.1007/s11465-019-0569-3

摘要： As a well-explored template that captures the essential dynamical behaviors of legged locomotion on sagittal plane, the spring-loaded inverted pendulum (SLIP) model has been extensively employed in both biomechanical study and robotics research. Aiming at fully leveraging the merits of the SLIP model to generate the adaptive trajectories of the center of mass (CoM) with maneuverability, this study presents a novel two-layered sagittal SLIP-anchored (SSA) task space control for a monopode robot to deal with terrain irregularity. This work begins with an analytical investigation of sagittal SLIP dynamics by deriving an approximate solution with satisfactory apex prediction accuracy, and a two-layered SSA task space controller is subsequently developed for the monopode robot. The higher layer employs an analytical approximate representation of the sagittal SLIP model to form a deadbeat controller, which generates an adaptive reference trajectory for the CoM. The lower layer enforces the monopode robot to reproduce a generated CoM movement by using a task space controller to transfer the reference CoM commands into joint torques of the multi-degree of freedom monopode robot. Consequently, an adaptive hopping behavior is exhibited by the robot when traversing irregular terrain. Simulation results have demonstrated the effectiveness of the proposed method.

关键词： legged robots spring-loaded inverted pendulum task space control apex return map deadbeat control irregular terrain negotiation

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Family planning technical services in China

Shang-Chun WU

《医学前沿（英文）》 2010年第4卷第3期页码 285-289 doi: 10.1007/s11684-010-0097-3

摘要： Family planning is a basic state policy in China. Its aim is to control population growth and to enhance population quality. Technical services are the key measures for implementing the family planning policy. In order to ensure that people use safe, effective, and appropriate contraceptive methods based on the government’s commitment, China has established countrywide family planning service networks down to the township level. The people can access various and convenient contraceptive services. In urban areas, all contraceptive services are free. The contraceptive prevalence rate in 2007 was 84.6%, the percentage of intrauterine device (IUD) was 52.3%, that of female sterilization was 32.3%, and that of vasectomy was 6.1%. This means that more than 90% of married childbearing couples were using long-term contraceptives. At the same time, the government gives priority to supporting research on contraceptive technology. Studies’ results have provided scientific evidence for development, introduction, and expansion of contraceptive methods, and also for establishment and revision of the technical guidelines. Great efforts have been made in promoting “human-oriented and client-centered” services during the recent ten years. Remarkable success has been achieved in improving the quality of technical services.

关键词： family planning contraceptive method service delivery

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面向任务信息的层次化存储DPM策略

黄少珉,戚隆宁,杨军,胡晨

《中国工程科学》 2010年第12卷第2期页码 83-89

摘要：在此基础上提出基于任务信息（task information based，TIB）的层次化存储DPM策略。

关键词：数据缓冲区任务信息 DPM 预读策略

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Enterprise-wide optimization of integrated planning and scheduling for refinery-petrochemical complex

《化学科学与工程前沿（英文）》 2023年第17卷第10期页码 1516-1532 doi: 10.1007/s11705-022-2283-7

摘要： This paper focuses on the integrated problem of long-term planning and short-term scheduling in a large-scale refinery-petrochemical complex, and considers the overall manufacturing process from the upstream refinery to the downstream petrochemical site. Different time scales are incorporated from the planning and scheduling subproblems. At the end of each discrete time period, additional constraints are imposed to ensure material balance between different time scales. Discrete time representation is applied to the planning subproblem, while continuous time is applied to the scheduling of ethylene cracking and polymerization processes in the petrochemical site. An enterprise-wide mathematical model is formulated through mixed integer nonlinear programming. To solve the problem efficiently, a heuristic algorithm combined with a convolutional neural network (CNN), is proposed. Binary variables are used as the CNN input, leading to the integration of a data-driven approach and classical optimization by which a heuristic algorithm is established. The results do not only illustrate the detailed operations in a refinery and petrochemical complex under planning and scheduling, but also confirm the high efficiency of the proposed algorithm for solving large-scale problems.

关键词： planning scheduling refinery-petrochemical convolutional neural network heuristic algorithm

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Development and challenges of planning and scheduling for petroleum and petrochemical production

Fupei LI, Minglei YANG, Wenli DU, Xin DAI

《工程管理前沿（英文）》 2020年第7卷第3期页码 373-383 doi: 10.1007/s42524-020-0123-3

摘要： Production planning and scheduling are becoming the core of production management, which support the decision of a petrochemical company. The optimization of production planning and scheduling is attempted by every refinery because it gains additional profit and stabilizes the daily production. The optimization problem considered in industry and academic research is of different levels of realism and complexity, thus increasing the gap. Operation research with mathematical programming is a conventional approach used to address the planning and scheduling problem. Additionally, modeling the processes, objectives, and constraints and developing the optimization algorithms are significant for industry and research. This paper introduces the perspective of production planning and scheduling from the development viewpoint.

关键词： planning and scheduling optimization modeling