The article considers the development of a heavy-class robotic ground combat system based on the BTR-4E armored personnel carrier. Analysis of samples the heavy class combat robotic ground complexes showed that they can be developed on the basis of serial crewed military vehicles HMMWV (AM General), M-ATV (Oshkosh), BMP-3 (Russia), T-72 (Russia), M113 (Israel), Patria AMV (Finland) or create a new design MDARS (AM General), Black Knight (BAE Systems), "Uran-9" (Russia), TYPE-X (Milrem Robotics). They are made on a tracked or wheeled platform. What unites this class of robotic ground combat systems is a remotely controlled combat module with a 25-30 mm cannon, anti-tank guided missiles, a machine gun and a grenade launcher, which can be controlled from a distance. A comparative analysis of the tactical and technical characteristics the BTR-4E armored personnel carrier with military vehicles with a 30 mm cannon in service with the Armed Forces of Ukraine has been performed. As a result, the choice of     BTR-4E armored personnel carrier as the basic crew unit for the construction of a heavy class robotic ground combat system has been substantiated. The analysis of the design of control drives of the power plant, transmission, braking system, steering system and combat module installed on the BTR-4E armored personnel carrier was carried out in terms of the possibility of implementing remote control of movement and fire. The structure of a combat ground robotic complex based on the BTR-4E armored personnel carrier with different variants of remote control panels, means of establishing communication channels and construction of a remote control station is proposed. For example, the driver's remote control panel may be designed on the basis a tablet or on the basis a simulator for full simulation of control commands. Remote controls for the commander and gunner can be designed on the basis of regular controls and be similar to them for quick training of the crew to work. Communication between remote control units and the controlled armored personnel carrier can be arranged using ultrashort-wave radios or via the 4G, 5G mobile network. The remote control point can also be developed on the basis a BTR-4E armored personnel carrier, a military vehicle or deployed on the ground. It depends on the concept of application of the heavy class combat ground robotic complex.

The article sets the task of optimizing the frame structure in order to reduce its own weight, taking into account the identification of the occurrence of a destruction factor. The search for a solution is carried out using evolutionary modeling, which in turn includes the choice of a mechanical model and a numerical model. The computational scheme includes the following main stages: finding, on the basis of optimal design, a design option that meets the requirements of the customer, performing calculations of this object in a static formulation under conditions of local damage, implementing a sequence of evolutionary syntheses of the structure when performing calculations of deformations of damaged systems. Based on the results of this check, the initial assumptions for the calculation can be corrected and the optimization procedures can be repeated. The calculation in a static setting is implemented within the framework of the deformation theory of elasticity, taking into account the influence of external loads. This task was implemented using the modern ANSYS software package. Thus, a comparison was made of various versions of the load-bearing frames of wheeled vehicles. The influence of the shape and weight of the structure on the strength under certain types of loading is determined. It is shown that when applying a certain type of design optimization, it is possible to increase the strength of the structure with an additional reduction in its weight. Keywords: Ansys, frame structure, 3D model optimization, static problem, elasticity theory, weight optimization, structural strength, finite elements