立位・座位動作のためのアクティブロボット支援:ハンドル軌道の実験的評価
Marko Ackermann1, Lizeth H Sloot2, Katja Mombaur3,4
1Institute for Anthropomatics and Robotics, Karlsruhe Institute of Technology (KIT), Adenauerring 12, 76131, Karlsruhe, BW, Germany. marko.ackermann@kit.edu.
Journal of neuroengineering and rehabilitation
|February 6, 2026
まとめ
移動ハンドルを備えたロボット歩行器は、座位・立位動作時の脚への負担を大幅に軽減し、高齢者の移動能力を向上させる可能性がある。最適化されたハンドル軌道は脚への負荷を70%以上削減するが、上半身への要求は増加する。
科学分野:
- 生体力学
- ロボット工学
- 支援技術
背景:
- 立位・座位動作にはかなりの脚力が必要であり、高齢者にとってはしばしば困難である。
- 既存のロボット歩行器はいくらかの支援を提供するが、最適な運動戦略は不明である。
- ロボットデバイスにおける座位・立位動作のための効果的な支援軌道に関するデータは限られている。
研究 の 目的:
- ロボット歩行器のための新規でスケーラブルなハンドル軌道を設計・評価すること。
- これらの軌道が脚への負荷とユーザーの認識に与える影響を評価すること。
- 座位・立位動作のための効果的なロボット支援の開発の基礎を提供すること。
主な方法:
- 支援のない肩の動きに基づいて、4つのパラメータ化されたハンドル軌道を開発した。
- 移動ハンドルを備えたロボット支援シミュレータを使用した。
- 15人の健康な若年成人を対象に、脚への負荷、ハンドルへの力、および認識される支援への影響を評価した。
主要な成果:
- 提案された軌道は、股関節と膝関節の伸展モーメントのピークをそれぞれ70%以上、50%以上削減した。
- ピークの垂直ハンドル力は30%以上増加し、体重の最大60%に達した。
- ピークの水平力は50%以上減少し、主観的な認識は機械的負荷の軽減と一致した。
結論:
- スケーラブルなハンドル軌道は、ロボット支援デバイスに実装され、脚への負荷を大幅に軽減できる。
- 移動ハンドル支援は、下肢の負荷軽減と上半身への要求増加とのトレードオフを提供する。
- 今回の発見は、座位・立位支援を必要とする対象集団を対象とした将来の研究の基礎を提供する。
関連する概念動画
Orthogonal Trajectories
70
Orthogonal trajectories describe the geometric relationship between two families of curves that intersect each other at right angles. One illustrative case involves a family of parabolas that open sideways along the x-axis. These curves share a common shape but differ by a scaling parameter, resulting in a set of curves that all pass through the origin and widen at different rates.Determining Orthogonal TrajectoriesTo identify the orthogonal trajectories for these parabolas, the first step...
70
Standing Waves
5.5K
Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...
5.5K
Sample Handling
2.7K
Transportation of samples from the collection point to the laboratory, as well as storage and preservation techniques, are crucial for maintaining sample integrity and ensuring accurate and reliable test results.
Samples should be transported carefully from collection points to the laboratory. They should be properly sealed and clearly labeled to prevent cross-contamination. To preserve the sample integrity, optimal temperature conditions during transport are essential. This could involve using...
Samples should be transported carefully from collection points to the laboratory. They should be properly sealed and clearly labeled to prevent cross-contamination. To preserve the sample integrity, optimal temperature conditions during transport are essential. This could involve using...
2.7K
Modes of Standing Waves - I
4.1K
A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This...
4.1K
Modes of Standing Waves: II
1.8K
The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions are derived from the physical understanding of how the standing waves are sustained, that is, how the vibrating particles of the medium behave at the boundaries imposed on them.
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end....
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end....
1.8K
Standing Waves in a Cavity
1.5K
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
1.5K


