Research Of Friction Sample Machine Chase And It's Servo Control

CHASE imported high cost of testing machine, the core part of its pressure control servo-pneumatic, pneumatic servo has many advantages, high control precision, no pollution, no hydraulic oil leakage, etc., but its high price is that many domestic manufacturers unacceptable. CHASE- domestic testing machine pneumatic servo control for the power to change - hydraulic servo control, while ensuring accuracy and greatly reduced the prices for the majority of users favor.CHASE-made testing machine to ensure the accuracy of test data, stability, become an important research issue. This paper describes the working principle CHASE testing machine, machinery, hydraulic control circuits, and hardware and software, control algorithms and data processing, grading reports. The approach of using the traditional PID and fuzzy control PID algorithm based on the conduct of CHASE pressure testing machine loading control, analysis and comparison of data obtainedThe main research directions have the following two aspects:1. For pressure control of the testing machine the difficulties and characteristics, combined with PID control and fuzzy control of the advantages of using the fuzzy PID control algorithm applied to the CHASE pressure testing machine load on the server. And following the detailed to design and application, to achieve a good control effect.2. The system's hardware circuit to consider anti-jamming, self-adjustment of the servo control board and signal- adjustment board, anti-interference performance has been greatly improved and achieved good results, while reducing costsThe results show that the compound used in the fuzzy PID control algorithm has strong robustness, strong anti-interference performance. Fuzzy PID control algorithm used to control the load pressure testing machine more stable, more accurate test data output.