时间序列分类用于预测双旋机器人步骤可行性
Jorge Igual1, Pedro Parik-Americano2, Eric Cito Becman2
1Instituto de Telecomunicaciones y Aplicaciones Multimedia (ITEAM), Departamento de Comunicaciones, Universitat Politècnica de València, 46022 Valencia, Spain.
Sensors (Basel, Switzerland)
|November 27, 2024
概括
这项研究引入了一个分类器来预测双脚机器人的步骤稳定性,从而实现实时防摔. 开发的分类器实现了95%的ROC AUC,为预测步骤可行性标准提供了更快,更有效的资源替代方案.
科学领域:
- 机器人技术 机器人技术 机器人技术
- 机器学习 机器学习
- 控制系统 控制系统
背景情况:
- 双螺旋机器人的稳定性对于防止摔倒时受损至关重要.
- 目前的稳定性评估方法,如预测阶段可行性 (PSV) 标准,是准确的,但不是实时可行的.
- 实时稳定性预测对于机器人主动降落缓解至关重要.
研究的目的:
- 开发一种实时,高效的分类器,用于预测计划中的双脚机器人步骤的稳定性.
- 通过使用专门设计,平衡和具有挑战性的数据集,创建一个强大的分类器.
- 用一个快速,嵌入式的解决方案取代计算密集的PSV标准.
主要方法:
- 在机器人步骤轨迹规划中使用时间序列数据进行特征工程.
- 使用从PSV标准中得出的基本真相进行监督分类.
- 数据集生成策略侧重于接近稳定/不稳定边界的步骤,以提高分类器的稳定性.
- 仅使用四个关键时间序列来提取特征.
主要成果:
- 在一个苛刻的数据集上实现了95%的ROC AUC.
- 分类器成功预测了阶段可行性 (稳定或不稳定).
- 证明了用计算效率高的模型取代PSV标准的能力.
结论:
- 开发了一种用于双脚机器人步骤稳定的新型实时分类器.
- 与PSV相比,分类器在计算效率和资源消耗方面提供了显著的改进.
- 这一进步使双脚机器人能够主动预防跌倒并最大限度地减少损害.
相关概念视频
01:14Mechanical Efficiency of Real Machines
The mechanical efficiency of a machine is a fundamental concept that describes how effectively a machine can convert input work into output work. According to this concept, the efficiency of a machine is equal to the ratio of the output work to the input work. An ideal machine, meaning a machine that has no energy losses, has an efficiency of one. This implies that the input work and the output work are equal.
However, in reality, no machine can be truly ideal, and all of them experience some...
However, in reality, no machine can be truly ideal, and all of them experience some...
01:24Sequence Networks of Rotating Machines
A Y-connected synchronous generator, grounded through a neutral impedance, is designed to produce balanced internal phase voltages with only positive-sequence components. The generator's sequence networks include a source voltage that is exclusively in the positive-sequence network. The sequence components of line-to-ground voltages at the generator terminals illustrate this configuration.
Zero-sequence current induces a voltage drop across the generator's neutral impedance and other...
Zero-sequence current induces a voltage drop across the generator's neutral impedance and other...
01:26Per-Unit Sequence Models
An ideal Y-Y transformer, grounded through neutral impedances, displays per-unit sequence networks akin to those of a single-phase ideal transformer when subjected to balanced positive- or negative-sequence currents. These currents do not produce neutral currents, and their associated voltage drops.
Zero-sequence currents, which are identical in magnitude and phase, generate a neutral current, resulting in voltage drops across the neutral impedance and the low-voltage winding. If the...
Zero-sequence currents, which are identical in magnitude and phase, generate a neutral current, resulting in voltage drops across the neutral impedance and the low-voltage winding. If the...
01:25Multimachine Stability
Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by: