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braking performance of a Biomimetic Squid-Like Underwater Robot

Journal of Bionic Engineering 2013年第3期10卷 265-273页

作者： Md. Mahbubar Rahman Sinpei Sugimori Hiroshi Miki Risa Yamamoto Yugo Sanada Yasuyuki Toda Laboratory of Hull Form Design Department of Naval Architecture and Ocean Engineering Graduate School of Engineering Osaka University Osaka 565-0871 Japan

In this study, the braking performance of the undulating fin propulsion system ofa biomimetic squid-like underwater robot was investigated through free run experiment and simulation of the quasi-steady mathematical model. The quasi-steady equa- tions of motion were solved using the measured and calculated hydrodynamic forces and compared with free-run test results. Various braking strategies were tested and discussed in terms of stopping ability and the forces acting on the stopping stage. The stopping performance of the undulating fin propulsion system turned out to be excellent considering the short stopping time and short stopping distance. This is because of the large negative thrust produced by progressive wave in opposite direction. It was confirmed that the undulating fin propulsion system can effectively perform braking even in complex underwater explorations.

关键词： biomimetics squid-like underwater robot undulating fin propulsion system braking performance motion simulation

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RESEARCH ON braking performance OF VEHICLE HYDRAULIC RETARDER BASED ON CFD NUMERICAL SIMULATION METHOD

RESEARCH ON BRAKING PERFORMANCE OF VEHICLE HYDRAULIC RETARDE...

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2006年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： LI Airong* ZHU Yanxia WANG Feng *Department of Materials Engineering, North University of China 030008, China College of Environment and Energy Engineering, Beijing University of Technology 100022, Chian School of Mechanical and Vehicle Engineering, Beijing Institute of Technology, Beijing 100081, China

This paper presents a CFD-based numerical simulation method to evaluate the braking performance of hydraulic retarder. This method is based on the theory of fluid transmission and the principle of com

关键词： Simulation braking performance evaluate

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Full Power Hydraulic Brake System Based on Double Pipelines for Heavy Vehicles

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Chinese Journal of Mechanical Engineering 2011年第5期24卷 790-797页

作者： GONG Mingde WEI Hailong College of Mechanical Science and Engineering Jilin University Changchun 130025 China

The hydraulic caliper disc brake system with air-over-oil is widely adopted at present for heavy vehicles,which makes use of air pressure system propelling the hydraulic pressure system acting on friction plates divided and combined for *** are some disadvantages such as pneumatic components failure,dust polluted and produce lots of heat in hydraulic caliper disc brake ***,considering the demands of the high speed,heavy weight,heavy load and fast brake of heavy vehicles,the full power hydraulic brake system based on double pipelines for heavy vehicles is designed and analyzed in this *** scheme of the full power hydraulic brake system,in which the triloculare cylinder is controlled by dual brake valve,is adopted in the brake *** full power hydraulic brake system can accomplish steering brake,parking brake and emergent brake for heavy ***,electronic control system that is responsible for coordinating the work of hydraulic decelerator and hydraulic brake system is developed for different speed *** on the analysis of the influence of composed unit and connecting pipeline on braking performance,the nonlinear mathematic model is established for the full power hydraulic brake *** braking completion time and braking pressure in braking performance of the double-pipeline steering brake and parking brake are discussed by means of simulation experiments based on Matlab/Simulink,and the simulation results prove that the braking performance of steering brake and parking brake meets the designing requirement of the full power hydraulic brake ***,the test-bed experiments of the brake system for heavy vehicles are carried *** experimental data prove that the braking performance achieves the goal of the design,and that the full power hydraulic brake system based on double pipelines can effectively enhance braking performance,ensure braking reliability and security for heavy vehicles.

关键词： heavy vehicle full power hydraulic brake system double-pipeline brake triloculare cylinder braking performance

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