Electrohydraulic servo system controlled by chip calculator with artificial intelligence

PID control method is difficult to control electrohydraulic servo systems, which possess natural nonlinearity and time varing properties, to get good performance. But the human intelligence simulating control, based on PID, is a kind of intelligent control, which simulates human intelligent activities when one controls the moving objects. This control method will not make destructive interference among the rapid, steady and accurate response characterist'cs, but the traditional PID will. The human being intelligence simulating control can make the system behave well according to man's will in three stages: accelerating at starting, braking when overshooting and eliminating error away when steadying. Experiments proved the outstanding performances of human intelligence simulating control.