Research On The Control System Of Hydraulic Impactor Base On Mechatronics

The article analyzes insufficient of energy and frequency's adjustment for traditional hydraulic impactor which is controlled only by hydraulic pressure base on its principle of work and operating performance, Pointes out places that need developed. And use the method of nitrogen pressure feedback, introduces mechatromics control strategy into the control system of gas-hydraulic impactor researched in the paper, which called mechanical-electrical control impactor.The paper introduces detailly the mechanical-electrical control impactor 's structure,principle of work and control method. On the one hand, the impactor's work frequency and single impact energy could be adjusted by operator; On the other hand, it also could adjust automatically hydraulic impactor′s work frequency and single impact energy according to the different physical property of work target, which mainly depend on control mode of computer system.For ease of computer control, the impactor use flat valve which is composed by high speed switch valve for first pilot valve and two cartridge inserted valves for second pilot valve, instead of conventional hydraulic cross valve, the paper illuminates the flat valve's design thought and controlled method, the simplification of work's principle and the facility of work frequency and single impact energy's adjustment are considered fully during the process of design. In order to further understand the operational characteristic,output parameter and working efficiency of the impactor's hydraulic control system, Mathematical model about hydraulic circle, dynamics model that aim at the impactor are founded separatively in the article. As for the computer control system, the design of hardware is introduced at frist, then when designing the software, it adoptes piston's maximum bounce velocity which computated through nitrogen chamber's pressure change quantity resuled from bounce after after piston impact chisel as input singal, and coordinates fuzzy control strategy, making the hydraulic impactor′s independent stepless control for work frequency and impact energy come true.Based on the theoretical design thought as above, the experimental platform for control system about mechanical-electrical impactor has been built and the new prototype impactor has been manufactured. The experiment is carried on through twe setp, Firstly, transforms traditional pure hydraulic control to mechanical-electrical impactor, achieving the work frequency and impact energy's adjustment in a certain scope by operator; Secondly, making the hydraulic impactor′s intellectualized work come true according to work target.Making full use of theoretical knowledge and experimental platform, the paper has carried on much experiment, experiment process and collected result indicate the system could adjust hydraulic impactor′s work frequency and single impact energy, which has improtant significance to impactor's intellectualized research and the hydraulic impactor industry's development presently.