Combining real accelerating genetic algorithm(RAGA) with the optimization design of multi-hole and varied diameter pipe, the authors solved the problem of optimizing multi-dimensional parameters at the same time. In w...Combining real accelerating genetic algorithm(RAGA) with the optimization design of multi-hole and varied diameter pipe, the authors solved the problem of optimizing multi-dimensional parameters at the same time. In which the advanced convergence and easily to run into partial optimization were avoid. Applied the RAGA to solving the problem in the optimization design of fixed piping sprinkler irrigation system. The optimized parameters, such as diameters and the length of pipe were calculated and the result was reasonable, which provides as a reference to readers who work at related research.展开更多
Spray irrigation is one of the effective techniques in saving water and increasing crop yield.Large-scale linear move spray irrigation systems are widely used in China.However,the traditional go-stop-go driving method...Spray irrigation is one of the effective techniques in saving water and increasing crop yield.Large-scale linear move spray irrigation systems are widely used in China.However,the traditional go-stop-go driving method causes difficulty in controlling the linear move irrigator.A new control method efficient in operation and the consumption of water,electricity,and labor is needed.Because of the difficulty in real-life examination of the designed systems,virtual reality technology was used to simulate the controlling and driving system in this study.Three-dimensional models of the irrigation system components were built at proper sizes.The three-dimensional images of the farmland as well as the mechanical models of the irrigation system were also built following the principles of ground vehicle dynamics.Application programs were developed to simulate the control system and the driving system.Through simulation an optimal control method was found,which was then used in the field test to control the large scale irrigator to move straight forward with an angle error of less than 0.06°.展开更多
文摘Combining real accelerating genetic algorithm(RAGA) with the optimization design of multi-hole and varied diameter pipe, the authors solved the problem of optimizing multi-dimensional parameters at the same time. In which the advanced convergence and easily to run into partial optimization were avoid. Applied the RAGA to solving the problem in the optimization design of fixed piping sprinkler irrigation system. The optimized parameters, such as diameters and the length of pipe were calculated and the result was reasonable, which provides as a reference to readers who work at related research.
基金This work was primarily funded by the Chinese National High Technology Program(“863”program)(No.2006AA10A305,2008AA100902)the“11th Five Year”program(No.2006BAD11A01,2006BAD11A01)of China.
文摘Spray irrigation is one of the effective techniques in saving water and increasing crop yield.Large-scale linear move spray irrigation systems are widely used in China.However,the traditional go-stop-go driving method causes difficulty in controlling the linear move irrigator.A new control method efficient in operation and the consumption of water,electricity,and labor is needed.Because of the difficulty in real-life examination of the designed systems,virtual reality technology was used to simulate the controlling and driving system in this study.Three-dimensional models of the irrigation system components were built at proper sizes.The three-dimensional images of the farmland as well as the mechanical models of the irrigation system were also built following the principles of ground vehicle dynamics.Application programs were developed to simulate the control system and the driving system.Through simulation an optimal control method was found,which was then used in the field test to control the large scale irrigator to move straight forward with an angle error of less than 0.06°.
