Design Of Micro-displacement Controller Based On Artificial Bee Colony Algorithm

Precision micro-displacement system occupies an extremely important position in the field of modern sophisticated industrial production and scientific research. It is widely used in the field of aerospace, micro mechanical manufacturing, ultra precision machining, medical, bio engineering etc. Nano displacement positioning technology has become an advancing force to promote technological development. The design of controller has become the focus of their research in the nano positioning control system. The appropriate control strategy is selected to solve the influence which piezoelectric actuator hysteresis, creep and nonlinear brings on the system, then to improve the positioning accuracy. Because the micro displacement control system is not accurate to position or positioning accuracy is not high, so colony PID control algorithm is designed to simulation and study in the paper. The main work is as follows:(1) The meaning and application fields of micro displacement platform control system are described, then the research and application of micro displacement control system and control method are introduced, which show that the study in designing micro displacement controller is still in the development stage in china.(2) The overall structure of micro-displacement platform is analysed. First, the overall structure of the micro displacement control system is introduced from the hardware configuration. Secondly, the control system of platform is designed. Finally, the communication mechanisms of micro displacement platform is analysed. The way that combine DSP, CPLD with USB can be used to control signals to transport and communicate for USB communication part of control systems.(3) The basic algorithm of the traditional PID controller is introduced, including the location of PID control algorithm and incremental PID control algorithm. And the performance index of the control system is analyzed, a variety of parameter setting methods of PID controller are introduced and the theory that the setting parameters are the key of PID control is pointed out.Principle and characteristics of artificial bee colony algorithm are described in detail and PID control method is proposed based on artificial bee colony algorithm.(4) Experimental study the designed bee colony PID algorithm in the micro-displacement control platform. First, optimization performance testing of artificial bee colony algorithm based on MATLAB. Secondly, the traditional PID, adaptive PID and bee colony PID step response are compared. Finally, the bee colony PID controller is realized in the micro-displacement platform.The results show that the bee colony PID controller can make the steady error of the micro displacement reach the nano meter level and satisfy the requirement of micro-displacement control precision of the positioning system and the high-precision position control can be achieved.In summary, the control algorithm of the micro-displacement control system are studied in this paper. The experimental results show the feasibility of the proposed algorithm and ensure the positioning accuracy of the system effectively. The controller design of micro-displacement control system is proposed, which has a certain reference value for relevant control algorithm of similar system design.