The subject of discussion is a tank gun horizontal stabiliser. In order to simplify identification, the system was divided into appropriate functional parts. Then, via laboratory tests, dynamic and static characteristics of those parts were obtained, and numerical values of coefficients of suitable mathematical model of the system were determined. The structural scheme of the overall system was derived on the basis of the obtained static characteristics and transfer functions of individual parts of the system, and based on the knowledge about the system feedbacks. For the investigation of the considered control system, one applied a method of computer simulations. The mathematical model and its numerical implementation was experimentally verified. To this aim: • the results of model testing (for open-loop system) were compared with the existing results of experimental tests carried-out on a real tank; • tests of the complete closed-loop system were carried -out and their results were compared with the results of numerical computations. The results of experimental and model simulation investigations showed that the mathematical model and its numerical implementation was worked-out correctly.

The subject of this paper is a real stabilising and tracking control system-namely, the tank gun horizontal stabiliser. The simulation investigations of the influence of regulation potentiometers settlings on stabilisation exactness and transient processes quality were carried-out using a verified mathematical model of the system. The author analysed the possibilities of improving performance characteristics of the stabiliser via altering of feedback's gain coefficients as well as the influence of disturbing inputs amplitude and frequency (propagated from the hull on the gunturret) on stabilisation exactness of a given position. In the result of model investigations, it was found that it would be impossible to improve significantly the stabiliser performance quality with its present structure. For this reason, one investigated the possibilities of adding new feedbacks and their influence on the stabilisation quality. The introduced feedbacks improved performance parameters of the stabiliser by about thirty to fifty percent.