Research On Network Control System Of Carbon Fiber Angle Weaving Equipmen

Carbon fiber,as a basic raw material,is widely used in high cutting-edge fields such as rockets,aerospace,new energy vehicles,etc.The research on the key control technology of carbon fiber diagonal loom is important to improve the performance of carbon fiber fabric.Carbon fiber diagonal loom is a complex equipment with multi-subsystems working together,and its control system is distributed and networked.However,the warp tension control strategy in the existing researches tend to have poor robustness to the influence of network factors.To solve this problem,this paper mainly focuses on the warp tension control of loom system in CANbus network,and the following researches are analyzed:(1)The design of networked control system for carbon fiber diagonal weaving equipment is studied.Firstly,the working principle and weaving technology of carbon fiber diagonal loom are described,and the performance requirements of the control system are defined.Secondly,the hardware selection and design of each subsystem of the loom are analyzed.Finally,the network communication protocol is formulated and the communication program flow is described.(2)The establishment of tension model for carbon fiber warp in CANbus network is studied,and a networked control model of warp tension based on T-S fuzzy model is proposed Firstly,the regional dynamic analysis of carbon fiber diagonal loom is analyzed,and the warp tension state equation is established based on the Kelvin model.Secondly,the time-varying delay and data packet dropouts of two-way channel of communication network are introduced into the model,and the networked control model of warp tension is obtained.Further,considering the stress-strain nonlinear characteristics of carbon fiber materials,the nonlinear term is added to the traditional Kelvin model,and it is locally linearized by T-S fuzzy modeling.Finally,a warp tension networked control model based on the T-S fuzzy model is obtained.(3)The control strategy design of warp tension in CANbus network is studied,and a networked optimal H_∞control strategy of warp tension is proposed.Firstly,the delay and packet dropouts dependent Lyapunov functional is constructed,and the sufficient conditions for mean square exponential stability and H_∞stability of the system are given by linear matrix inequality(LMI)method.Secondly,through the cone complement linearization iterative algorithm(CCL),the solution steps of the controller based on the observer are given;Simulation results show that the proposed controller can realize constant tension control of warp under certain network disturbance and opening motion disturbance.(4)The design of warp tension control strategy based on the T-S fuzzy model under CANbus network is studied,and a networked T-S fuzzy control strategy of warp tension is proposed.Firstly,the global fuzzy controller and observer are designed by using the parallel distributed compensation theorem(PDC).Secondly,the time delay,packet dropouts dependent and fuzzy set dependent Lyapunov functional of the system are constructed,the sufficient conditions for the mean square exponential stability and H_∞stability of the system are given,and the solution steps of the controller and observer of the T-S fuzzy system are given by using the optimized CCL iterative algorithm.Simulation results show that the robustness of the system is further enhanced.