obsidian_backup/补课/多体动力学/.ipynb_checkpoints/06_Vector_differentiation-checkpoint.ipynb

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{
"cells": [
{
"cell_type": "code",
"execution_count": 1,
"metadata": {},
"outputs": [],
"source": [
"import sympy as sm\n",
"import sympy.physics.mechanics as me\n",
"me.init_vprinting()"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {},
"outputs": [],
"source": [
"theta, beta, alpha, l = me.dynamicsymbols('theta, beta, alpha, l')\n",
"A, B, C, D = sm.symbols('A, B, C, D', cls=me.ReferenceFrame)"
]
},
{
"cell_type": "code",
"execution_count": 3,
"metadata": {},
"outputs": [],
"source": [
"B.orient_axis(A, theta, A.z)\n",
"C.orient_axis(B, beta, -B.x)\n",
"D.orient_axis(C, alpha, C.z)\n",
"B.dcm(A)"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": [
"r = l *D.x\n",
"r"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": []
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"language": "python",
"name": "python3"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.12.4"
}
},
"nbformat": 4,
"nbformat_minor": 4
}