10KN Fatigue Testing Machine

The system consists of a host machine, constant-pressure servo pump station, Dragon 900 controller, computer and software, piping system, etc., and can be used for dynamic performance, fatigue, and static mechanical property testing of various materials, structural parts, and components. The testing machine is equipped with an upper compression head, and the lower worktable has a bench-type working pressure plate. It can perform compression, dynamic low-cycle fatigue, programmed fatigue, fracture mechanics, as well as static constant deformation, constant load control, and various mechanical property tests on specimens.

Summary of the main technical specifications of the entire machine:
◎ Maximum static test force: ±10 kN;
◎ Maximum dynamic test force: ±10 kN;
◎ Test force accuracy: Within the range of 1%-100%, accuracy reaches ±1% of the indicated value;
◎ Dynamic fluctuation of test force indication: ≤2%;
◎ Force coaxiality better than 5%;
◎Maximum actuator stroke: ±100 mm, indication accuracy ±0.5%;
Main test waveforms: sine wave, square wave, triangle wave, trapezoidal wave, sawtooth wave, custom wave, and externally input waveform;
Frequency range: 0.01-30Hz;
Control system: Dalong 900 full digital hydraulic servo controller;
◎ Pump station: 21MPa, 22L/min, 11kW, AC three-phase, 380V;
◎ Pipe length: 6m;
◎Attachments: one set

Technical Advantages of the Entire Machine:
1) High machine rigidity, with a rigidity of 1.6*10^9 N/m;
2) Displacement is measured using a magnetostrictive sensor with a digital interface, ensuring a measurement accuracy of 0.002 mm and guaranteeing reliable system operation and precise control.
3) The closed-loop control frequency of the Dailong controller is 10,000 Hz, setting it ahead of both domestic and international controllers in control frequency.
4) Sliding mode variable structure control automatically adjusts controller parameters every 0.1 milliseconds based on the sliding mode observer state, achieving optimal closed-loop performance.
5) The typical 1 mm displacement step response (nozzle-flapper servo valve) has a rise time below 5 milliseconds, overshoot less than 2%, and settling time below 10 milliseconds.
6) The closed-loop amplitude stability accuracy of the 50Hz sine wave is better than 2%.
7) Digital handwheel synchronization with patented technology, infinitely variable speed following from 0 to 1000 mm/min, position following accuracy of 1 micron.
8) High-fidelity replication of the spectrum load test is achieved based on the controller's excellent response performance and the machine's overall rigidity.