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Terminal guidance control method and system of unmanned aerial vehicle

A control method and control system technology, applied in the field of UAV terminal guidance control method and system, can solve problems such as poor realizability, difficult engineering application, complex form, etc., achieve accurate interception of targets, and improve penetration capabilities , the effect of defending against missile attacks

Pending Publication Date: 2022-05-13
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chang Chao et al. from Beijing Institute of Technology deduced the optimal terminal guidance law with landing point and landing angle constraints using the Lagrangian method. The form of the guidance law is relatively complicated and the realizability is not strong.
[0007] Chao Tao from Harbin Institute of Technology published a paper on the design of guidance law for tilt-turn aircraft with angle constraints. Considering the dynamic characteristics of the control loop, the optimal guidance law based on the sliding mode surface was designed, and the chattering was eliminated by adjusting the parameters of the sliding mode approach law. , although the guidance law can prove convergence, its form is still complicated, and there are 5 parameters to be determined
[0008] Most of the current existing technologies are not easy to apply in engineering, and most of the reference objects of proportional guidance are missiles. There are big differences between drones and missiles in terms of aerodynamic shape and control methods

Method used

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  • Terminal guidance control method and system of unmanned aerial vehicle

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Experimental program
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Embodiment 1

[0056] The embodiment proposes the invention and proposes a terminal guidance control method of UAV, which is based on the terminal guidance control system of UAV, such as Figure 1As shown in, the terminal guidance control is carried out by passive radar guidance; The terminal guidance control system comprises a guidance subsystem, a control subsystem and a position sensor;

[0057] The guidance subsystem comprises a passive radar seeker unit and a guidance command generation device; The control subsystem comprises a flight control unit, an actuator and an attitude sensor; The passive radar seeker unit, the guidance command generation device, the flight control unit and the actuator are connected in turn, and are connected with the body control of the UAV through the actuator; The attitude sensor and position sensor are respectively installed on the body, the attitude sensor is connected with the flight control unit, and the position sensor is connected with the guidance command g...

Embodiment 2

[0068] Based on the above embodiment 1, in order to better realize the invention, the embodiment further Figure 6 As shown in, Figure 6 It is the schematic diagram of the terminal guidance and control system, which combines the input of the seeker and the output of the guidance command. The model is built through Simulink to realize the full digital simulation closed-loop control, so as to analyze the impact of the guidance accuracy. In step 2, the specific operations of forming guidance instructions are as follows:

[0069] Step 2.1: Information Modeling and filtering processing of passive radar seeker;

[0070] Step 2.2: solve the guidance command;

[0071] Step 2.3: estimate the location of the attack target.

[0072] Specifically, the step 1.2 further comprises:

[0073] Step 2.1.1: obtain the aircraft state information through the passive radar seeker and position sensor, calculate the relative motion relationship between UAV and target, and construct the relative motion mode...

Embodiment 3

[0102] On the basis of any one of the above embodiments 1-2, in order to better realize the invention, in step 2.1.4, the filtering module adopts the first-order inertial link low-pass filtering method to process the input line of sight angle with noise, line of sight angle with noise, estimated line of sight angle rate and line of sight angle rate; At the same time, Kalman filter is set to jointly estimate the LOS angle rate and LOS angle rate.

[0103] Working principle: firstly, the line of sight angle of the seeker output relative to the body coordinate system is converted to the inertial coordinate system. Secondly, the line of sight angular rate is calculated in the following way, in which the time interval is taken according to the operation cycle of the control system.

[0104]

[0105] The line of sight angle output by the seeker and the estimated line of sight angle rate are filtered by the first-order inertial link low-pass filter:

[0106]

[0107] Where t 2 Is a tim...

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Abstract

According to the terminal guidance control method and system of the unmanned aerial vehicle, the terminal guidance control system is constructed based on a homing guidance mode according to the guidance characteristics of the electronic warfare unmanned aerial vehicle, the corresponding terminal guidance control method is provided, the diagonal constraint and guidance precision requirements are met through a passive radar guidance method, and the terminal guidance control system and the terminal guidance control method are applied to the electronic warfare unmanned aerial vehicle. And meanwhile, tail end maneuvering and simulated attack control are realized, targets are accurately intercepted, missile attacks are defended, and the defense penetration capability is improved.

Description

technical field [0001] The invention belongs to the technical field of aerospace UAV, in particular to a terminal guidance control method and system of UAV. Background technology [0002] Electronic warfare UAV is an aircraft used to attack the specified target. It is required that the aircraft has the ability to fly to the target accurately and meet or collide with it within the killing radius. The task of the guidance and control system of electronic warfare UAV is to guide the aircraft to overcome various interference factors and fly to the target autonomously and accurately according to the determined laws and requirements. The guidance control system is composed of a guidance system and a control system. The guidance system measures the deviation between the actual motion of the UAV and the required motion, or measures the relative position and deviation between the UAV and the target, forming a guidance command part for controlling the flight of the UAV, including a seeker,...

Claims

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Application Information

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IPC IPC(8): G05D1/08G05D1/10
CPCG05D1/0808G05D1/106
Inventor 崔庆梁赵东宏李照宏张瞿辉田峰赵创新章进东
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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