Method and device for improving mechanical flexibility of hydraulic valve control cylinder system

Abstract

The invention discloses a method and device for improving mechanical flexibility of a hydraulic valve control cylinder system. The method comprises the steps that the flexible valve control cylinder system is constructed, and a hydraulic driver model and an energy accumulator model are obtained; acquiring pressure data of the hydraulic driver; coulomb friction force in the hydraulic cylinder is calculated according to the pressure data; calculating average working pressure data and gas volume data of the hydraulic energy accumulator; calculating a hydraulic capacitive reactance value; inputting a displacement instruction, and calculating the displacement error of the actuator by combining the actual displacement value of the hydraulic cylinder actuator; constructing an error time integral; and evaluating the maximum mechanical flexibility of the valve control cylinder system and feeding back control. The device comprises a module for realizing the method for improving the mechanical flexibility of the hydraulic valve control cylinder system. By using the invention, the flexibility of the valve-controlled cylinder system is improved. The method and the device for improving the mechanical flexibility of the hydraulic valve control cylinder system can be widely applied to the field of servo control.

Description

technical field [0001] The invention relates to the field of servo control, in particular to a method and a device for improving the mechanical compliance of a hydraulic valve-controlled cylinder system. Background technique [0002] At present, the methods for improving the compliance of the valve-controlled cylinder system are generally divided into two types: passive and active. The passive method mainly adds flexible components, such as springs and dampers, to the mechanical system structure to absorb and store energy to improve system compliance, but its flexibility is not adjustable, difficult to control, and cumbersome to integrate. The active method generally fully reflects the position and force information in the valve-controlled cylinder system. By designing the control algorithm, the actuator has high control accuracy and improves the system compliance. However, the active method often needs to increase the number of sensors. Quantity, technical means for improv...

AI Technical Summary

Problems solved by technology

The passive method mainly absorbs and stores energy by adding flexible components, such as springs and dampers, to the mechanical system structure to improve system compliance, but its flexibility is not adjustable, difficult to control, and cumbersome to integrate.

The active method generally fully reflects the position and force information in the valve-controlled cylinder system. By designing the control algorithm, the actuator has high control accuracy and improves the system compliance. However, the active method often needs to increase the number of sensors. Quantity, technical means to improve information processing, and design of complex control algorithms greatly increase the workload of the entire system design

Neither the passive nor the active method has been studied from the perspective of the influence of friction on the compliance of the hydraulic valve-controlled cylinder system.

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