The following code implements Henon map system with XWindow Motif widgets. You don't need to have the commercial Motif library on your system. I have the gnu version called Lesstif and was successfully compiled on my Linux machine. A simple demonstration of Recursive proportional Feedback algorithm as appllied to Henon map is given here.

The bouncing ball code bball.c is a simple C program that simulates a freely falling ball under the influence gravity and it also demonstrates the reconstruction of the chaotic attractor using impact time interval. The program was used to plot the 3-D embedding of the attractor, bifurcation diagram and the phenomenon of crisis. The XWindow based interactive version is more elaborate in the sense that it implements the control algorithm (RPF) in conjunction with adaptive learning algorithm. The implementation of control algorithm is general in the sense that it assumes no knowledge of the model and thus can be directly applied to control data from an experimental system. The program besides many other things allows real time 3-D visualization of the attractor is possible and one can rotate the coordinate system about any of the X-, Y- or Z- axes. The DOS version does exactly the same thing.

The program used for the presentation of N-ball falling freely under gravity with motion constrained along the vertical direction and balls with different masses and stationary "table" is given here. This is probably the only program downloadable from this website which demonstrates chaos in Hamiltonian system.

As a simple test of the high dimensional adaptive recursive proportional feedback (HDARPF) control algorithm with tracking through the parameter space, there is an implementation for the case of Henon map. This is written with X-Window graphics interface. A full blown actual implementation of our HDARPF algorithm, implemented on a Hyper-chaotic Rossler attractor, is Windows based program, with various options. The executable with documentation will be soon made available. The program additionally allows data acquisition from an experimental setup via National Instruments - ATMIO-16E data acquisition board and allow real time control of an actual experimental system. The program runs both in model or data acquisition mode.

The following is one single tarred gzipped source code and executable for the software developed between 96-99 as a part of my doctoral thesis. The programs basically simulate

The individual directories can be had from here.

Nonlinear Pendulum impacting a Moving Wall (MW)

Driven Linear Oscillator Constrained by staionary walls

Spatio-temporal chaos in globally driven impact coupled SHOs