Drivers are the center of vehicles and transportation systems.Because of the rapid development of advanced technologies,artificial drivers have been developed as key elements in vehicles and transportation systems.The...Drivers are the center of vehicles and transportation systems.Because of the rapid development of advanced technologies,artificial drivers have been developed as key elements in vehicles and transportation systems.The inconsistency between human drivers and artificial drivers will lead to accidents and congestion.To make future vehicles and transportation systems trustworthy in driving safety and acceptable in travel efficiency,developing technologies based on human drivers’reliable knowledge and cognitive intelligence together with smart operations is an essential and promising solution.However,there are many challenges to be addressed including the learning of smart human perception,reliable smart inference strategies in decision-making,adaptive correction of inappropriate driving operation,knowledge mapping and enhancement of smart human driving in various scenarios,etc.展开更多
This paper presents the design of a bionic pectoral fin with fin rays driven by multi-joint mechanism.Inspired by the cownose ray,the bionic pectoral fin is modeled and simplified based on the key structure and moveme...This paper presents the design of a bionic pectoral fin with fin rays driven by multi-joint mechanism.Inspired by the cownose ray,the bionic pectoral fin is modeled and simplified based on the key structure and movement parameters of the cownose ray's pectoral fin.A novel bionic propulsion fin ray composed of a synchronous belt mechanism and a slider-rocker mechanism is designed and optimized in order to minimize the movement errors between the designed fin rays and the spanwise curves observed from the cownose ray,and thereby reproducing an actively controllable flapping deformation.A bionic flapping pectoral fin prototype is developed accordingly.Observations verify that the bionic pectoral fin flaps consistently with the design rule extracted from the cownose ray.Experiments in a towing tank are set up to test its capability of generating the lift force and the propulsion force.The movement parameters within the usual propulsion capabilities of the bionic pectoral fm are utilized:The flapping frequency of 0.2 Hz-0.6 Hz,the flapping amplitude of 3°-18°,and the phase di^rence of 10°-60°.The results show that the bionic pectoral fin with actively controllable spatial deformation has expected propulsion performance,which supports that the natural features of the cownose ray play an important role in designing and developing a bionic prototype.展开更多
文摘Drivers are the center of vehicles and transportation systems.Because of the rapid development of advanced technologies,artificial drivers have been developed as key elements in vehicles and transportation systems.The inconsistency between human drivers and artificial drivers will lead to accidents and congestion.To make future vehicles and transportation systems trustworthy in driving safety and acceptable in travel efficiency,developing technologies based on human drivers’reliable knowledge and cognitive intelligence together with smart operations is an essential and promising solution.However,there are many challenges to be addressed including the learning of smart human perception,reliable smart inference strategies in decision-making,adaptive correction of inappropriate driving operation,knowledge mapping and enhancement of smart human driving in various scenarios,etc.
基金The work presented in this paper is supported by the Beijing Municipal Natural Science Foundation(No.3182019)the Fundamental Research Funds for the Central Universities(No.YMF-19-BJ-J-345)the China Scholarship Council(No.201706025027).
文摘This paper presents the design of a bionic pectoral fin with fin rays driven by multi-joint mechanism.Inspired by the cownose ray,the bionic pectoral fin is modeled and simplified based on the key structure and movement parameters of the cownose ray's pectoral fin.A novel bionic propulsion fin ray composed of a synchronous belt mechanism and a slider-rocker mechanism is designed and optimized in order to minimize the movement errors between the designed fin rays and the spanwise curves observed from the cownose ray,and thereby reproducing an actively controllable flapping deformation.A bionic flapping pectoral fin prototype is developed accordingly.Observations verify that the bionic pectoral fin flaps consistently with the design rule extracted from the cownose ray.Experiments in a towing tank are set up to test its capability of generating the lift force and the propulsion force.The movement parameters within the usual propulsion capabilities of the bionic pectoral fm are utilized:The flapping frequency of 0.2 Hz-0.6 Hz,the flapping amplitude of 3°-18°,and the phase di^rence of 10°-60°.The results show that the bionic pectoral fin with actively controllable spatial deformation has expected propulsion performance,which supports that the natural features of the cownose ray play an important role in designing and developing a bionic prototype.
