10KN fatigue testing machine

It consists of a host machine, a constant pressure servo pump station, a Dailong 900 controller, a computer and software, a pipeline system, etc. It can be used for dynamic performance, fatigue and static mechanical performance testing of various materials, structural parts, and components.The testing machine is equipped with an upper pressure head and a lower workbench with a desktop working pressure plate.Compression, dynamic low-cycle fatigue, programmed fatigue, fracture mechanics, static constant deformation, constant load control and various mechanical property tests can be performed on the specimens.

Summary of the main technical indicators of the whole machine:
◎Maximum static test force: ±10kN;
◎Maximum dynamic test force: ±10kN;
◎Test force indication accuracy: within the range of 1%-100%, the accuracy reaches ±1% of the indication value;
◎The fluctuation degree of dynamic indication of test force: ≤2%;
◎The force coaxiality is better than 5%;
◎Maximum stroke of actuator: ±100mm, indication accuracy ±0.5%;
◎Main test waveforms: sine wave, square wave, triangle wave, trapezoidal wave, sawtooth wave, custom wave and external input waveform;
◎Frequency range: 0.01-30Hz;
◎Control system: Dailong 900 fully digital hydraulic servo controller;
◎Pumping station: 21MPa, 22L/min, 11kW, AC three-phase, 380V;
◎Pipeline length: 6m;
◎Accessories: one set

Technical advantages of the whole machine:
1) The stiffness of the whole machine is high, the stiffness of the whole machine is 1.6*109N/m;
2) The displacement uses a magnetostrictive sensor and a digital interface to ensure the displacement measurement accuracy is 0.002mm, ensuring reliable operation and precise control of the system.
3) The closed-loop control frequency of Dailong controller is 10000Hz, and the control frequency is ahead of domestic and foreign controllers;
4) Sliding mode variable structure control, according to the status of the sliding mode observer, the controller parameters are automatically switched every 0.1 milliseconds to obtain optimal closed-loop performance.
5) Typical 1mm displacement step response (nozzle baffle servo valve) rise time is less than 5 milliseconds, overshoot is less than 2% and settling time is less than 10 milliseconds.
6) The 50Hz sine wave closed-loop amplitude stability accuracy is better than 2%.
7) Patented digital handwheel follow-up, stepless speed follow-up from 0-1000mm/min, and position follow-up accuracy of 1 micron.
8) Based on the excellent response performance of the controller and the stiffness of the whole machine, a high-fidelity restored spectrum load test is achieved.