Research And Realization Of Precision Gyro Temperature Control System Based On IMC

This paper describes the designing of gyro temperature control system with non-linear, large inertia on the base of IMC (Inner Model Control) theory and AVR MCU (Micro programmed Control Unit) from project reality. It emphasizes on the study of the modeling of the temperature control model, the design of IMC system, the program of four-ladder Runge-Kutta algorithm and the software and hardware design of the whole temperature control system.Inside the gyro, object's large time lag and all kinds of unmeasurement disorders are ubiquitous and hard to control. One side, traditional PID control is widely used for its simpleness of control and parameter's setup, the stable state's good performance and high dependability, etc. But traditional PID control can hardly get satisfactory control result on the occasion of process quality index's worsen and high control precision to periodicity and multi-frequency disorders. The other side, IMC is a kind of powerful design, analyses and predict tool and a new-type control strategy that the controller is designed on the basis of process mathematics model. The advantage of IMC is that IMC can sum up PID control, Smith predict control, the determinacy linear optimum square feedback control and many kinds of prediction control under the same framework. IMC has simplicity of design principle and parameter alignment and good characters of track adjustability and robust.In addition, for getting actual temperature control model, use the least square weighted fusion algorithm; for increasing whole systems' control precision, take advantage of AVR MCU, four-ladder Runge-Kutta algorithm and high credibility software. Through simulation of the control system, the result makes clear that the controller has very good characteristics of adjustability, anti-jamming and robust.