Study On Singlechip-Control-based Servo Controller Of Electro-hydraulic Shaking Table

Electro-hydraulic shaking table has been widely applied to practical industry for its eminent performance-price ratio, which is the focus of attentions in application research fields. And servo-controller as its controlling center is especially significant. As we have been known, Electro-hydraulic servo-system is essentially non-linear, and using the traditional operational-point linearization approach to devise controller, the effect of controlling relies on the precision of linearization and the operational point where it is. However, if the operational point changes, it has to redesign the controlling parameters, and even modify the whole structure of the controller. In view of this, this paper firstly elects the development platform of both the software and hardware systems of Electro-hydraulic shaking table servo-controller, then presents the design of controller from the angle of intelligent control, thus the operational space of the controller can be extended greatly.The efforts to be shown in the paper include: building on the mathematics model of Electro-hydraulic shaking table, after the analysis of the dynamic characteristics of Electro-hydraulic shaking table the conclusion that it is essentially non-linear is drawn; according to the aforementioned characteristics and with the view to the actual research object, we present the outline of the system design and criteria of the Electro-hydraulic shaking table servo-controller; due to the research object we practically work over two control strategies and correspondingly scheme out two controllers, which is PID controller and human simulating intelligent controller based on Ziegler-Nichols parameters-adjust empiric formula; we develop Electro-hydraulic shaking table servo-controller, constitute entire hardware system platform and accomplish the correspond codes of the software which combine to complement its most functions; the simulation of the adjust stability of controlling system and servo trailing control has been made by MATLAB, which compares the simulation results of the behavior of PID controller and human simulating intelligent controller.The paper points to the matter of non-linear control of the system and present some resolves, in accordance to the requirements of Electro-hydraulic shaking table servo- -controller. However, there is still much work for us to do in order to constitute a complete set of servo controller, which will be carried on in our future research.