| The nacelle-cover is one of the core components of the wind turbine,and its function is to protect the internal electrical and mechanical equipment of the wind turbine from the external environment.The harsh working environment need higher requirements on the assembly quality of the nacelle-cover.The production speed and quality of the nacelle-cover directly determine the production efficiency and service life of wind power.At present,the nacelle-cover assembly mainly uses crane hoisting or fixed ground tooling,which occupies the assembly site for a long time.In this way,the assembly efficiency is low,and the labor intensity is high.In addition,the assembly accuracy cannot be guaranteed.With the continuous expansion of the wind power market and the growth of single-machine power generation,conventional assembly methods of nacelle-cover is unable to meet the market’s requirements for the production efficiency and assembly quality of nacelle-covers.Therefore,designing a assembly platform of nacelle-cover has become an important part in improving the production efficiency and assembly quality of the nacelle-cover.Firstly,according to the assembly requirements of the nacelle-cover,a set of assembly platform of nacelle-cover is designed after studying a large number of assembly technologies and hydraulic platforms at domestic and abroad.The assembly platform is based on hydraulic and pneumatic equipment,and realizes the automatic assembly of nacelle-covers of different types of wind turbines such as 4MW and 6MW.Secondly,the hydraulic system of the assembly platform is designed and analyzed,the mathematical model of valve-controlled asymmetric hydraulic cylinder is established,and the frequency characteristics and dynamic characteristics of the system are studied.The traditional PID control is applied to the electro-hydraulic servo control system of the assembly platform,the response characteristics are studied,and the synchronization performance of the dual hydraulic cylinders of the assembly platform is simulated and analyzed.The fuzzy adaptive PID control is introduced into the original control system,and the fuzzy controller of the hydraulic system of the assembly platform is designed and simulated.Through the simulation results,the influence of fuzzy adaptive PID control on the dynamic characteristics of the original system and the synchronous displacement difference of the front and rear tilt hydraulic cylinders is analyzed.Finally,the computer control interface of the assembly platform of nacelle-cover is designed.The assembly platform of nacelle-cover combines hydraulic equipment and automatic control principles,so that the motion accuracy of the platform achieves the design goals,with good control performance. |
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