arXiv:2509.15778eess.SYcs.RO2025-09被引 1

电动重型机械臂优化配置与无传感器控制,提升效率与可靠性。

All-Electric Heavy-Duty Robotic Manipulator: Actuator Configuration Optimization and Sensorless Control

  • 融合建模与多目标优化,选最优电驱直线执行器配置。
  • 无传感器控制实现负载变化下精准轨迹跟踪,误差小。
  • 适合重载工业机器人研发,对电驱系统设计有实用价值。

本文提出一种统一框架,整合全电动重型机械臂(HDRM)的建模、优化与无传感器控制,该机械臂由机电直线执行器(EMLA)驱动。建立了EMLA模型,捕捉电机电磁特性及方向依赖的传动效率;同时构建了包含运动学与动力学的HDRM数学模型,生成指定末端执行器(TCP)轨迹的关节空间运动规划。设计了安全约束的轨迹生成器,将笛卡尔目标映射至关节空间,满足关节限位与速度余量要求。基于所得力与速度需求,采用多目标非支配排序遗传算法II(NSGA-II)优化最佳EMLA配置。为加速优化,引入深度神经网络,基于EMLA参数预测稳态执行器效率。针对选定配置,构建物理信息引导的克里金代理模型,结合解析模型与实验数据学习EMLA输出残差,支持力与速度的无传感器控制。执行器模型嵌入分层虚拟分解控制(VDC)框架,输出电压指令。在单自由度EMLA试验平台上验证,实现了不同负载下的精确轨迹跟踪与有效的无传感器控制。

原文摘要 · Abstract (English)

This paper presents a unified framework that integrates modeling, optimization, and sensorless control of an all-electric heavy-duty robotic manipulator (HDRM) driven by electromechanical linear actuators (EMLAs). An EMLA model is formulated to capture motor electromechanics and direction-dependent transmission efficiencies, while a mathematical model of the HDRM, incorporating both kinematics and dynamics, is established to generate joint-space motion profiles for prescribed TCP trajectories. A safety-ensured trajectory generator, tailored to this model, maps Cartesian goals to joint space while enforcing joint-limit and velocity margins. Based on the resulting force and velocity demands, a multi-objective Non-dominated Sorting Genetic Algorithm II (NSGA-II) is employed to select the optimal EMLA configuration. To accelerate this optimization, a deep neural network, trained with EMLA parameters, is embedded in the optimization process to predict steady-state actuator efficiency from trajectory profiles. For the chosen EMLA design, a physics-informed Kriging surrogate, anchored to the analytic model and refined with experimental data, learns residuals of EMLA outputs to support force and velocity sensorless control. The actuator model is further embedded in a hierarchical virtual decomposition control (VDC) framework that outputs voltage commands. Experimental validation on a one-degree-of-freedom EMLA testbed confirms accurate trajectory tracking and effective sensorless control under varying loads.

机械臂无传感器控制电驱系统优化

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