Research And Analysis Of Cruise Missile Ballistic Trajectory Optimization

In recent years,the rapid development of modern high and new technology,the computing power of computers,the way to obtain information,and the changes in automatic control technology are changing rapidly,which makes precision-guided weapons such as missiles,guided artillery shells and guided bombs play an increasingly important role in modern warfare.Trajectory optimization is the key research direction of cruise missile,which runs through the design of multiple subsystems of cruise missile.It is an important factor to determine whether the missile system can be designed.Therefore,the research and analysis of cruise missile ballistic trajectory optimization has very important theoretical research significance and practical engineering value.In this paper,for the ballistic trajectory optimization design problem,we first transform the ballistic optimal control problem into a nonlinear programming problem(NLP)using the Gaussian pseudospectral method(GPM).The first method is to construct a particle swarm algorithm(PSO)to solve the NLP problem once to obtain an initial ballistic trajectory,and then to achieve the optimal selection of the initial value of the sequential quadratic programming(SQP)algorithm,and finally to bring the initial value into the SQP algorithm to solve the NLP problem.The second method is the HP adaptive pseudospectral method,which first solves the NLP problem with the SQP algorithm,and then adaptively adjusts the interval length and the order of the Lagrangian interpolation basis function based on iterations until the calculated accuracy meets the preset requirements.The results of ballistic trajectory optimization simulation show that the ballistic optimization design simulation using the first method for a certain type of missile can quickly find an optimized trajectory with the shortest flight time.It not only retains the fast global optimization ability of PSO algorithm,but also solves the problem of initial value dependence of SQP algorithm.The second method is used to optimize and simulate the trajectory of cruise missile with different cruise schemes and different battlefield environments,we can quickly and accurately find the trajectory that satisfies all constraints and makes the multi-objective function optimal.