The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Compared with the conventional optimization approaches, Gauss Pseudospectral Method (GPM) can deal better with optimal problems with complex constraints and is less time consuming. As a numerical technique, GPM transforms the optimal control problem to a nonlinear programming problem (NLP) by using discrete approximation. This paper considers a cruise missile's mission which is to hit a fixed target...
A Gauss Pseudospectral Method for trajectory optimization is presented and applied successfully to the 3-dimensional lunar ascent problem in this paper. Firstly, the profile of lunar ascent is discussed. In order to setup the optimal control problem, 3-dimensional dynamics and kinematics equations of the lunar ascent is established, the angle of attack and bank angle are chosen as optimal control...
This paper studies the solving of time optimal control problems by using a hybrid genetic algorithm (HGA). HGA is a kind of GA in which the position displacement idea of the Particle Swarm Optimization (PSO) is applied to change the mutation operation rule and fix the next generation of chromosomes by recording the history optimal value of each chromosome and the optimal value of population. This...
Fuel optimization of fixed time hard rendezvous problem is studied. Optimal fuel is calculated by indirect and direct approaches respectively. The indirect approach is based on primer vector theory, and primer vector of transfer orbit is calculated and improved. A nonlinear optimization model is formulated for the problem of multiple-impulse rendezvous optimizing by direct approach, and the optimal...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.