Research On Cooperative Interception Using Multiple Flight Vehicles Based On Finite-time System Theory

As the environment of air-combat is getting more and more complicated and theperformance of weapons is getting more and more improved, cooperative battle usingmultiple flight vehicles is becoming the main mode in the complex air-combat. In orderto expand defense area and improve defense power, lots of countries lay the defense tac-tics with cooperative interception using multiple flight vehicles. Most of existing worksignore the external relevance between top-level strategy and low-level design. In prac-tice, we have to synthesize relevance of all parts so that the requirement of cooperativebattle can be satisfied. Therefore, it’s necessary to sum up the subproblems under thisbackground and adopt efective methods to guarantee the integral performance of cooper-ative interception, considering the relevance among subproblems. Under the backgroundof cooperative interception, this dissertation mainly works on some guidance and controlproblems. The main contributions are summarized as follows.First, aiming at the finite-time characteristic of cooperative interception, we studiedfinite-time system theory. An extended Lpspace and input-output signal measure of sys-tem performance are introduced. Finite-time H∞control is introduced. For discrete-eventsystem, finite-time quadratic optimizations are proposed based on mixed-logic dynamic.Besides, the description and characteristic of multi-agent network are introduced basedon which finite-time consensus is proposed under input constraints.Second, aiming at cooperative detection in cooperative interception, a cooperative-detection approach is proposed based on mixed-logic dynamic optimization. Combiningthe characteristics of terminal guidance system, relative kinematics model is formulatedbetween the target and the flight vehicle. The definitions of level-of-interest and age areintroduced, on this basis, age-correction model is formulated considering the informationexchange among vehicles. Based on the idea of mixed-logic dynamic optimization, theoptimization problem on processing frequency of target information is solved. A robotexperiment is implemented for verifying the feasibility of the proposed method.Thirdly, aiming at target assignment in cooperative interception, a finite-time-norm-based target-assignment approach is proposed. Combining the characteristics of targetassignment in cooperative interception, the constraints and assignment principle are pro-posed. We point out the main factors of energy cost are handover error and target maneu- ver, the index function is constructed in a finite-time norm pattern which represents theenergy cost of the flight vehicle. Based on the performance criterion of finite-time norm,the solving methods of the finite-time-norm-based target-assignment problem is proposed.According to the result of target assignment, cooperative guidance in the many-to-manyinterception is decomposed into one-to-one, one-to-many and many-to-one guidance sce-narios.Fourthly, aiming at cooperative guidance-law design in cooperative interception, aone-to-many guidance law based on finite-time H∞control and a many-to-one guidancelaw based on finite-time consensus are proposed. The models for both one-to-many andmany-to-one guidance are formulated. The one-to-many principle is given based on finite-time quadratic optimal control, on this basis, a one-to-many guidance law is proposedbased on finite-time H∞control. Besides, considering the constraints of control input,a many-to-one guidance law is design based on finite-time consensus, furthermore theconnection condition of network is analyzed which guarantee the salvo.At last, a control and guidance design for cooperative interception using multipleflight vehicles against a hypersonic target is carried out. Combining the motion charac-teristics of hypersonic target, the condition of cooperative interception is set up. On thisbasis, aiming at the problems of cooperative detection, target assignment and cooperativeguidance in the terminal guidance of cooperative interception, corresponding optimizationand guidance-law design are implemented. The efectiveness of the proposed methods isverified through the simulation result.