The main analysis methods of hydraulic system characteristics are as follows:
1. Experimental research method
Experimental research method is mainly for a specific problem, through the establishment of a real component system, real test, and then according to the results of the test, analyze the parameters that affect the dynamic structure of the system, through continuous tests to modify the parameters repeatedly, and finally get the optimal scheme. The experimental research method requires the designer to have rich experience, low cost and more time.
2. Simulation method
Simulation method mainly uses the similarity between circuit system and hydraulic system to transform hydraulic circuit into similar circuit to express, and constructs similar circuit and similar components with circuit system. The physical model is expressed by voltage, and then the differential equation reflecting the dynamic characteristics of the system is solved by continuous operation. The debugging of the simulation method is simple and the situation is close to the reality, but its accuracy is low.
3. Traditional function method
Firstly, according to the physical equation which can describe the characteristics of the system, the corresponding mathematical model is established, and the incremental form is obtained. Then the mathematical model is transformed by Laplace transform, and the corresponding transfer function is obtained. Transfer function method is generally suitable for linear system, but it is not accurate for nonlinear system, and it is easy to produce large deviation.
4. Digital simulation
Digital simulation method is mainly through the establishment of the mathematical equations of the system, and then use the mathematical simulation method to analyze these digital equations. Generally speaking, these digital models are usually high-order equations, so they need to be transformed into first-order differential equations, and then the transformed first-order equations can be solved by numerical method to analyze the dynamic characteristics of the system.
