Perching and Grasping Mechanism Inspired by a Bird’s Claw

Zhu, Yong; He, Xiumin; Zhang, Ping-Xia; Guo, Gaozhi; Zhang, Xiwan

doi:10.3390/machines10080656

Cited by 10 publications

(17 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Contrary to bird-inspired (7)(8)(9)(10)(11) and embedding-based aerial robots (48,49) that mainly depend on rigid mechanical construction to perch on static/quasi-static specified surfaces, the proposed robot can dynamically perch on and take off from various moving/ static surfaces (e.g., surfaces of buildings and vehicles) and absorb impact energy, inhibit rebound, and adapt various perching surfaces via structured soft materials. Meanwhile, the proposed robot can directly land on moving surfaces by relying on the high attachment ability of electrically active smart adhesive (fig.…”

Section: Discussionmentioning

confidence: 99%

“…Numerous existing aerial robots (especially with the weight on the magnitude of kilograms)-mimicking the "wrapping" (6), "grasping" (7)(8)(9)(10)(11)(12), and "hooking" (13) behaviors of flying creatures or attachment style (14)(15)(16)(17) of gecko and octopus-perched on arborization structures, surfaces of buildings, or other specific surfaces. However, the abovementioned approaches generally based on complicated rigid design theory (e.g., using mechanisms, motor/ pump, and grasping and locking devices), while promising on static/quasi-static perching surfaces, still seriously haunt UAVs' reversible perching on moving targets due to numerous inherent shortcomings.…”

Section: Introductionmentioning

confidence: 99%

“…However, the abovementioned approaches generally based on complicated rigid design theory (e.g., using mechanisms, motor/ pump, and grasping and locking devices), while promising on static/quasi-static perching surfaces, still seriously haunt UAVs' reversible perching on moving targets due to numerous inherent shortcomings. Ingenious rigid grasping/attachment structures or motors (7)(8)(9)(10)(11)14) are prone to trigger large weight, inertia, and landing impact, especially due to a substantial relative velocity difference between the UAV and the moving target; advanced control algorithms and additional sensors are conducive to alleviate inertia and impact and achieve stable perching yet again increase the weight of UAVs (10,12,(18)(19)(20). Moreover, unfriendly contact adaptability on perching surfaces and subsequent rebounds triggered by landing impact can sabotage the grasping/attachment ability, inducing perching failure (10).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electrically active smart adhesive for a perching-and-takeoff robot

Liu,

Tian,

Wang

et al. 2023

Sci. Adv.

View full text Add to dashboard Cite

Perching-and-takeoff robot can effectively economize onboard power and achieve long endurance. However, dynamic perching on moving targets for a perching-and-takeoff robot is still challenging due to less autonomy to dynamically land, tremendous impact during landing, and weak contact adaptability to perching surfaces. Here, a self-sensing, impact-resistant, and contact-adaptable perching-and-takeoff robot based on all-in-one electrically active smart adhesives is proposed to reversibly perch on moving/static dry/wet surfaces and economize onboard energy. Thereinto, attachment structures with discrete pillars have contact adaptability on different dry/wet surfaces, stable adhesion, and anti-rebound; sandwich-like artificial muscles lower weight, enhance damping, simplify control, and achieve fast adhesion switching (on-off ratio approaching ∞ in several seconds); and the flexible pressure (0.204% per kilopascal)–and–deformation (force resolution, <2.5 millinewton) sensor enables the robot’s autonomy. Thus, the perching-and-takeoff robot equipped with electrically active smart adhesives exhibits tremendous advantages of soft materials over their rigid counterparts and promising application prospect of dynamic perching on moving targets.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrically active smart adhesive for a perching-and-takeoff robot

Liu,

Tian,

Wang

et al. 2023

Sci. Adv.

View full text Add to dashboard Cite

show abstract

“…Scientists have used birds [4] or insects as sources of inspiration for studying and designing flying machines. Flapping-wing flight modes in nature are roughly classified into two types based on the type of wing movement [5].…”

Section: Introductionmentioning

confidence: 99%

Bionic Hovering Micro-Aerial Vehicle Using Array-Spiracle Wings

et al. 2022

View full text Add to dashboard Cite

Hovering ability is the basis of fixed-point monitoring and tracking of an aircraft. Herein, we propose a new hovering vehicle inspired by bird feathers, with an airfoil composed of passive opening and closing feather units. Two wings of the prototype are vertically distributed and driven in anti-phase linear reciprocation. The lift is generated by the asymmetric flow of air caused by the opening and closing of the feather unit. The design of the vehicle is simple and can be incorporated into a large-area hovering platform for large loads. In this paper, the design and fabrication of the vehicle are described, along with an aerodynamic theoretical model of the vehicle kinematics. The correctness of the model was verified by numerical calculations and tests on the opening and closing characteristics of the plume unit. The opening and closing characteristics of the feather unit were investigated and revealed through controlled-variable experiments. An experimental prototype with a mass of 52 g was built. During preliminary flight tests, the vibration frequency was controlled to verify that the prototype was capable of hovering and vertical takeoff and landing.

show abstract

“…Inspired by biological systems like birds [6], soft grippers have demonstrated the ability to mitigate contact forces and compensate for grasping inaccuracies, exemplifying the concept of morphological computation, which combines passive mechanical components with explicit control [7]. To leverage these advantages, some researchers have developed a bio-inspired tendon-actuated soft gripper, as the bending capability of the gripper can be easily controlled by manipulating the attached tendon [8], [9], [10].…”

Section: B Related Workmentioning

confidence: 99%

A study of the motivation of clerical officers in the Hong Kong Polytechnic University

張元妹¹

View full text Add to dashboard Cite

Automatic fact-checking plays a crucial role in combating the spread of misinformation. Large Language Models (LLMs) and Instruction-Following variants, such as InstructGPT and Alpaca, have shown remarkable performance in various natural language processing tasks. However, their knowledge may not always be up-to-date or sufficient, potentially leading to inaccuracies in fact-checking. To address this limitation, we propose combining the power of instruction-following language models with external evidence retrieval to enhance fact-checking performance. Our approach involves leveraging search engines to retrieve relevant evidence for a given input claim. This external evidence serves as valuable supplementary information to augment the knowledge of the pretrained language model. Then, we instruct-tune an open-sourced language model, called LLaMA, using this evidence, enabling it to predict the veracity of the input claim more accurately. To evaluate our method, we conducted experiments on two widely used fact-checking datasets: RAWFC and LIAR. The results demonstrate that our approach achieves state-of-the-art performance in fact-checking tasks. By integrating external evidence, we bridge the gap between the model's knowledge and the most up-to-date and sufficient context available, leading to improved fact-checking outcomes. Our findings have implications for combating misinformation and promoting the dissemination of accurate information on online platforms. Our released materials are accessible at: https://thcheung.github.io/factllama.

show abstract

Perching and Grasping Mechanism Inspired by a Bird’s Claw

Cited by 10 publications

References 26 publications

Electrically active smart adhesive for a perching-and-takeoff robot

Electrically active smart adhesive for a perching-and-takeoff robot

Bionic Hovering Micro-Aerial Vehicle Using Array-Spiracle Wings

A study of the motivation of clerical officers in the Hong Kong Polytechnic University

Contact Info

Product

Resources

About