Simulation study of flux adaptation, pressure adaptation and P-N-Q complex control were done. Simulation research was done to study the characteristics of flux adaptation, pressure adaptation and P-N-Q complex control, and the effect of hydraulic parameters on system.
With this, the hydraulic parameters of the damper are identified using polynomial fitting. Comparison of the test data and the results of calculation with the fitting parameters shows that the values of fitting parameters are valid.
By studying structural principle of BYL PQ valve, its work principle is introduced in Chapter 2.Chapter 3 analyzes the static performance of BYL PQ valve by building its static model, and studies the disturbing ingredient that affects the static performance of PQ valve.
For researching the coinstantaneous working process of every unit of the hydraulic device and the influence of the main parameters on control effect,the software named AMESim was used to establish the model of the hydraulic device. The mathematical models of the main parts were built to provide suggestions for design and matching of the hydraulic control device.
The problems about the basic hydraulic pressure parameter (work pressure and work volume of flow) affect the mechanical function of shock machine were analyzed in this paper, and we also discussed the relation between the rate of flow and pressure in the shock machine.
It is the key to design digital valves that stepping motor is perfectly coupled in hydraulic valves. Stepping motor generally makes rotative incrcase motion,and main spool does linear motion to change its lap with valve ports in order to realize the control for hydraulic parrameters. Some studies of digital valve and its E/M interface ,and relevant to control system are made in the paper.
A test analysis is given of a new - type fluid parameter tester representing a high performance, multi - function, portable test instrument controlled by Mes - 51 Single - chip computer. The tester can measure pressure, flow, rotation speed, oil temperature and some other parameters of hydraulic aystems. lt is accurately, fast and easily. lt is an instrument of urgent demand in domestic market.