A Fast Simulation Analysis Method for Radar Antenna Servo System

Abstract

The invention discloses a quick simulation analysis method for a radar antenna servo system. The quick simulation analysis method includes the steps that (1) parametric modeling of a bond graph is carried out, components in the system are simplified according to the modeling sequence of a drive motor, a transmission mechanism and a reflecting surface body and accordingly a bond graph model of the antenna servo system is built; (2) virtual prototype multi-rigid-body modeling is carried out, part rigid-body models in all links are sequentially built on the basis of the modeling theory that each solid body in the system corresponds to one rigid body in a multi-rigid-body model, the corresponding rigid bodies are combined according to a parametric model of the bond graph and accordingly a system design model is obtained; (3) a parameter synchronization mechanism is introduced, and design model parameters are transferred to the bond graph model synchronously by means of a design model information file; (4) a system mathematic model is deducted according to the system bond graph model. Mathematical modeling simulation, multi-rigid-body modeling simulation and bond graph modeling simulation methods are well combined, advantages are made use of and defects are avoided.

Description

technical field [0001] The invention belongs to the field of antenna technology, specifically a fast simulation analysis method for radar antenna servo systems, and introduces a model parameter synchronization mechanism to realize the seamless connection between the design model and the bonding graph model, thereby overcoming the need for the design model to complicate the model. It is difficult to solve and cannot obtain a mathematical model, and the bond graph model modeling efficiency is low, which improves the speed of simulation analysis. Background technique [0002] The precision of the antenna servo system directly affects the dynamic performance of the antenna system. However, many nonlinear factors in the servo system seriously restrict the improvement of its precision. Among them, the friction of the driving part and the backlash in the transmission mechanism are the main factors. In order to improve the accuracy of the system more effectively, the existence of va...

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Problems solved by technology

[0005] (2) Multi-rigid body modeling and simulation. The commonly used software is ADAMS, which is a mechanical modeling method. It establishes its corresponding design model for each part in the system. For entities with complex shapes, other 3D modeling software can be used to establish and Import, the model parameters can be automatically obtained by specifying the material properties of the components, all calculations in the simulation analysis are background operations, and the system mathematical model cannot be obtained

However, the parameters of the model cannot be directly obtained during the bond graph modeling process, and need to be extracted and assigned one by one, which also leads to low bond graph modeling efficiency

[0011] To sum up, for complex antenna servo timing systems with nonlinear links, the existing modeling and simulation methods have their own shortcomings in modeling, simulation and model verification.

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