The basic working principle of the buffer hydraulic cylinder device is that during the linear movement of the rod, the piston approaches the flange of the rod side end, and the predetermined buffer pressure is generated in the rod side chamber. It also includes an elastic body provided on the buffer sleeve to prevent the piston from The flange of the rod side end collides and absorbs the impact by its elasticity. The ideal curve is the best curve to realize the buffer positioning of the hydraulic cylinder. Using the ideal curve to achieve the buffer positioning of the hydraulic cylinder, the positioning accuracy can reach ±0.02mm under the condition of servo control.
The pressure impact during positioning is small, and the stroke and initial speed of the buffer positioning can be arbitrarily set according to needs, which solves the contradiction between the positioning accuracy and the working speed, which not only improves the positioning quality but also improves the working efficiency.
The object of ideal curve control is the hydraulic system. There are two methods to achieve buffer positioning, one is proportional control system, and the other is servo control system. The effect of servo control is better than proportional control.
There are also two ways in control: PID controller and self-organizing fuzzy controller. Using the high-order curve as the input signal and the PID controller as the control algorithm, the servo system was tested, and the rise time was 0.2 seconds, the overshoot was within 7%, and the positioning accuracy was ±0.02MM.