Общий подход к построению математических моделей и алгоритмов для решения прямых и обратных задач для сервопривода жидкости с управлением дроссельной заслонкой

Abstract

It is pointed out that direct and inverse parametric problems on fluid servo drives with throttle control of energy flows (FSD/T) are usually dealt with using various mathematical models and packages of application computer programs depending on the solution objectives, established drive structure and design, and the type of input information signal. An FSD/T with a mechanical signal is known as a hydromechanical servo drive(HMSD/T), and that with an electrical is known as an electrohydraulical servo drive (EHSD/T). Special-purpose fluid servo drives with throttle control that use a combined signal are also possible. The variety of models is a factor that adds difficulty to development of algorithms and use of the obtained information; in particular, when transition from direct to inverse scenarios is made. At the same time, whatever the type of information signal, the drive structure contains the same energy loop, namely, a combination of the hydraulic amplifier output stage and a hydraulic motor. It is exactly this loop that determines the FSD/T power and dynamic performance characteristics. A universal mathematical model of a single-channel FSD/T, which is equally effective for solving direct and inverse problems as applied to HMSD/T and EHSD/T, is presented. The peculiarities of writing the universal model for HMSD/T and EHSD/T are considered in detail; a block diagram of implementing the software package for numerically solving direct and inverse problems is given, and algorithms for solving direct and inverse parametric problems for this model are presented. A universal algorithm and block diagram for solving the direct and inverse Pareto optimization problem for some particular competition parameters are drawn up. The advantages of using the universal model for the real optimization design of this class of drives are shown.