Unlike traditional manipulators with high rigidity and limited degrees of freedom,pneumatic manipulators have significant superiorities such as flexibility,lightweight and cleanliness,and therefore,have been one of th...Unlike traditional manipulators with high rigidity and limited degrees of freedom,pneumatic manipulators have significant superiorities such as flexibility,lightweight and cleanliness,and therefore,have been one of the most popular research directions in robotics.However,most existing pneumatic manipulators have disadvantages such as low rigidity and simple functionality.In order to make up for the shortcomings of existing pneumatic manipulators,this paper proposes a new pneumatic flexible manipulator inspired by the concept of origami,which realizes the combination and balance of flexibility and rigidity.Finite element analysis is conducted to study influences of the number of airbags,the angle of main beam,and the width of main beam on the performance of the flexible manipulator.The simulation results are utilized to optimize the structure of the flexible manipulator.A pneumatic control system is designed to realize the automatic control of the pneumatic flexible manipulator.At the same time,a prototype is 3D printed,the experimental platform for pneumatic deformation is built,and the verification experiments of the single-jaw manipulator and the three-jaw manipulator are completed.展开更多
Deployable parabolic cylindrical antennas with lightweight and high deploy/fold ratio are a research hotspot in aerospace.Most of the deployable structures of parabolic cylindrical antennas are double-layer truss stru...Deployable parabolic cylindrical antennas with lightweight and high deploy/fold ratio are a research hotspot in aerospace.Most of the deployable structures of parabolic cylindrical antennas are double-layer truss structures,which are heavy and oversized in folded volume.The 2D origami-inspired structure is a typical single-layer deployable structure,including multiple origami configurations that provide various strategies for designing single-layer deployable structures.This study proposes a design method for origami-inspired single-layer truss structures applied to deployable parabolic cylindrical mesh reflector antennas.Unlike the widely researched thick-panel origami structure,we adopt the strategy of equating the creases in the origami model as links with constant length,and the vertices are regarded as hinges.The design criteria for an origami-inspired single-layer truss structure are researched and summarized by analyzing the engineering issues during design.Based on this design method,a single-layer deployable truss applied to a parabolic cylindrical antenna is presented.An optimization model of the antenna driving components is established to ensure that the antenna can deploy appropriately on the basis of the co-simulation of MATLAB and finite element software Abaqus.The optimization results are validated through software simulation and prototype test.The work presented in this paper can broaden the application of origami-inspired structures and provide a reference for the design of parabolic cylindrical antennas or curved surface mechanisms.展开更多
The development of microengineered hydrogels has opened up unlimited possibilities for designing complex structures at the microscale. In this study, we constructed an origami-inspired tubular structure with controlle...The development of microengineered hydrogels has opened up unlimited possibilities for designing complex structures at the microscale. In this study, we constructed an origami-inspired tubular structure with controlled mechanical buckling based on optically induced electrokinetics(OEK). By inducing a stress gradient in the thickness, a tubular structure can be formed from a poly(ethylene glycol) diacrylate(PEGDA) hydrogel film of various shapes that have been custom fabricated. To achieve an ideal three-dimensional(3D) structure, the amplitude of the tubular structure can be controlled by adjusting the aspect ratios or polymerization time. Furthermore, the tubular structure can be manipulated for the collection and transportation of microspheres.In summary, we provide an effective method for designing 3D structures at the micro-nano scale. This forming method holds great potential for achieving various functions in tissue engineering, drug packaging, and transportation in the future.展开更多
Given the rise in the popularity of wearable electronics that are able to deform into desirable configurations while maintaining electrochemical functionality,stretchable and flexible(hybrid)supercapacitors(SCs)have b...Given the rise in the popularity of wearable electronics that are able to deform into desirable configurations while maintaining electrochemical functionality,stretchable and flexible(hybrid)supercapacitors(SCs)have become increasingly of interest as innovative energy storage devices.Their outstanding power density,long lifetime with low capacitance loss,and appropriate energy density,in particular in hybrid cases make them ideal candidates for flexible electronics.The aim of this review paper is to provide an in-depth discussion of these stretchable and flexible SCs ranging from fabrication to electro-mechanical properties.This review paper begins with a short overview of the fundamentals of charge storage mechanisms and different types of multivalent metal-ion hybrid SCs.The research methods leading up to the current state of these stretchable and flexible SCs are then presented.This is followed by an in-depth presentation of the challenges associated with the fabrication methods for different configurations.Proposed novel strategies to maximize the elastic and electrochemical properties of stretchable/flexible or quasi-solid-state SCs are classified and the pros and cons associated with each are shown.The advances in mechanical properties and the expected advancements for the future of these SCs are discussed in the last section.展开更多
In order to rapidly and accurately evaluate the mechanical properties of a novel origami-inspired tube structure with multiple parameter inputs,this study developed a method of designing origami-inspired braces based ...In order to rapidly and accurately evaluate the mechanical properties of a novel origami-inspired tube structure with multiple parameter inputs,this study developed a method of designing origami-inspired braces based on machine learning models.Four geometric parameters,i.e.,cross-sectional side length,plate thickness,crease weakening coefficient,and plane angles,were used to establish a mapping relationship with five mechanical parameters,including elastic stiffness,yield load,yield displacement,ultimate load,and ultimate displacement,all of which were calculated from load-displacement curves.Firstly,forward prediction models were trained and compared for single and multiple mechanical outputs.The parameter ranges were extended and refined to improve the predicted results by introducing the intrinsic mechanical relationships.Secondly,certain reverse prediction models were established to obtain the optimized design parameters.Finally,the design method of this study was verified in finite element methods.The design and analysis framework proposed in this study can be used to promote the application of other novel multi-parameter structures.展开更多
基金National Natural Science Foundation of China(12002032).
文摘Unlike traditional manipulators with high rigidity and limited degrees of freedom,pneumatic manipulators have significant superiorities such as flexibility,lightweight and cleanliness,and therefore,have been one of the most popular research directions in robotics.However,most existing pneumatic manipulators have disadvantages such as low rigidity and simple functionality.In order to make up for the shortcomings of existing pneumatic manipulators,this paper proposes a new pneumatic flexible manipulator inspired by the concept of origami,which realizes the combination and balance of flexibility and rigidity.Finite element analysis is conducted to study influences of the number of airbags,the angle of main beam,and the width of main beam on the performance of the flexible manipulator.The simulation results are utilized to optimize the structure of the flexible manipulator.A pneumatic control system is designed to realize the automatic control of the pneumatic flexible manipulator.At the same time,a prototype is 3D printed,the experimental platform for pneumatic deformation is built,and the verification experiments of the single-jaw manipulator and the three-jaw manipulator are completed.
基金supported by the National Natural Science Foundation of China(Grant No.52475280).
文摘Deployable parabolic cylindrical antennas with lightweight and high deploy/fold ratio are a research hotspot in aerospace.Most of the deployable structures of parabolic cylindrical antennas are double-layer truss structures,which are heavy and oversized in folded volume.The 2D origami-inspired structure is a typical single-layer deployable structure,including multiple origami configurations that provide various strategies for designing single-layer deployable structures.This study proposes a design method for origami-inspired single-layer truss structures applied to deployable parabolic cylindrical mesh reflector antennas.Unlike the widely researched thick-panel origami structure,we adopt the strategy of equating the creases in the origami model as links with constant length,and the vertices are regarded as hinges.The design criteria for an origami-inspired single-layer truss structure are researched and summarized by analyzing the engineering issues during design.Based on this design method,a single-layer deployable truss applied to a parabolic cylindrical antenna is presented.An optimization model of the antenna driving components is established to ensure that the antenna can deploy appropriately on the basis of the co-simulation of MATLAB and finite element software Abaqus.The optimization results are validated through software simulation and prototype test.The work presented in this paper can broaden the application of origami-inspired structures and provide a reference for the design of parabolic cylindrical antennas or curved surface mechanisms.
基金supported by the National Natural Science Foundation of China(Grant No.62273289)the Youth Innovation Science and Technology Support Program of Shandong Province(Grant No.2022KJ274)。
文摘The development of microengineered hydrogels has opened up unlimited possibilities for designing complex structures at the microscale. In this study, we constructed an origami-inspired tubular structure with controlled mechanical buckling based on optically induced electrokinetics(OEK). By inducing a stress gradient in the thickness, a tubular structure can be formed from a poly(ethylene glycol) diacrylate(PEGDA) hydrogel film of various shapes that have been custom fabricated. To achieve an ideal three-dimensional(3D) structure, the amplitude of the tubular structure can be controlled by adjusting the aspect ratios or polymerization time. Furthermore, the tubular structure can be manipulated for the collection and transportation of microspheres.In summary, we provide an effective method for designing 3D structures at the micro-nano scale. This forming method holds great potential for achieving various functions in tissue engineering, drug packaging, and transportation in the future.
文摘Given the rise in the popularity of wearable electronics that are able to deform into desirable configurations while maintaining electrochemical functionality,stretchable and flexible(hybrid)supercapacitors(SCs)have become increasingly of interest as innovative energy storage devices.Their outstanding power density,long lifetime with low capacitance loss,and appropriate energy density,in particular in hybrid cases make them ideal candidates for flexible electronics.The aim of this review paper is to provide an in-depth discussion of these stretchable and flexible SCs ranging from fabrication to electro-mechanical properties.This review paper begins with a short overview of the fundamentals of charge storage mechanisms and different types of multivalent metal-ion hybrid SCs.The research methods leading up to the current state of these stretchable and flexible SCs are then presented.This is followed by an in-depth presentation of the challenges associated with the fabrication methods for different configurations.Proposed novel strategies to maximize the elastic and electrochemical properties of stretchable/flexible or quasi-solid-state SCs are classified and the pros and cons associated with each are shown.The advances in mechanical properties and the expected advancements for the future of these SCs are discussed in the last section.
基金supported by the Jiangsu Provincial Department of Science and Technology Projects(BZ2022049 and BE2023801).
文摘In order to rapidly and accurately evaluate the mechanical properties of a novel origami-inspired tube structure with multiple parameter inputs,this study developed a method of designing origami-inspired braces based on machine learning models.Four geometric parameters,i.e.,cross-sectional side length,plate thickness,crease weakening coefficient,and plane angles,were used to establish a mapping relationship with five mechanical parameters,including elastic stiffness,yield load,yield displacement,ultimate load,and ultimate displacement,all of which were calculated from load-displacement curves.Firstly,forward prediction models were trained and compared for single and multiple mechanical outputs.The parameter ranges were extended and refined to improve the predicted results by introducing the intrinsic mechanical relationships.Secondly,certain reverse prediction models were established to obtain the optimized design parameters.Finally,the design method of this study was verified in finite element methods.The design and analysis framework proposed in this study can be used to promote the application of other novel multi-parameter structures.
