The problem of small UAVs flight optimization is considered. To solve this problem thermal updrafts are used. For the precise detection of the thermal updrafts center the simultaneous perturbation stochastic approximation (SPSA) type algorithm is proposed. If UAVs use thermal updrafts so they can save the energy during the flight. Therefore the flight time will be vary for different UAVs. In or...

We design a feedback control architecture for longitudinal flight of an aircraft. The multi-level architecture includes the flight control loop to govern the short term dynamics of the aircraft, and the autopilot to control the long term modes. Using H∞ performance and robustness criteria, the problem is cast as a non-convex and non-smooth optimization program. We present a non-convex bundle me...

Given a flight schedule, which is a set of flight segments with specified departure and arrival times, and a set of aircraft:, the fleet assignment problem is to determine which aircraft type should fly each flight segment. The objective is to maximize revenue minus operating costs. In the basic fleet assignment problem considered by Hane et al. (1995) a daily, domestic fleet assignment prohlem...

To solve the problem that distributed fixed wing formation cannot know all other aircraft states through ground station and may collide, improved artificial potential field method based on binocular stereo vision was proposed. This makes not need to obtain position information of from station, but only module relative speed aircraft. These two parameters are used improve traditional meet requir...

With the increasing development of UAV technology, formation flight has also changed from single target task execution to multi-target cooperative execution. When is developing rapidly in direction clustering, there are too many external interference factors. Therefore, electromagnetic silence should be maintained for a long time whole flight, and number times when transmitting wave signals out...

In order to maintain the formation of UAVs during flight, pure azimuthal passive positioning is generally used adjust position UAVs. accurately perform UAV positioning, this paper establishes a single-objective optimization model with passively received signals based on polar coordinates UAVs, combined geometric knowledge such as sine theorem and triangle properties. And then optimized improved...