Research And Realization Of High Precision Gyro Temperature Control System

This paper discusses the design and tests of the high precision gyro temperature control system with IMC(Inner Model Control),illustrating the differences between this system and the traditional PID control system. It emphasizes on the study of the modeling of the temperature control system, the design of IMC system and the hardware and software 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. The traditional PID control can hardly get satisfactory control result. 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.This paper makes the control model with the least square weighted fusion algorithm. Using advantaged AVR MCU and four-ladder Runge-Kutta algorithm, we design a high precision gyro temperature control system based on IMC. The simulations and tests of the system makes clear that the IMC controller has very good characteristics of adjustability, anti-jamming and robust.