Simulating an aircraft means computing its evolutions through time. It can be achieved by representing the aircraft as a solid, computing the forces and moments applied to it, and (numerically) solving the differential equations resulting for the solid’s physics. Pat provides tools to easily simulate an aircraft using the Python language.
import numpy as np, pat3.utils as p3_u, pat3.vehicles.fixed_wing.legacy_6dof as p3_fw
dm = p3_fw.DynamicModel_ee(p3_u.pat_ressource('data/vehicles/cularis.xml'))
Xe, Ue = dm.trim({'h':0, 'va':10, 'gamma':0}, report=True)
time = np.arange(0, 5., 0.01)
X, U = np.zeros((len(time), dm.sv_size)), np.zeros((len(time), dm.iv_size))
X[0] = dm.reset(X0, time[0])
for i in range(1, len(time)):
X[i] = dm.run(time[i] - time[i-1], time[i], U[i-1])
dm.plot_trajectory(time, X, U)
plt.show()
./src/pat3/test/fixed_wing/test_01_dynamics.py