Shim Yoon-Sik, Kim Chang-Hun
Department of Computer Science and Engineering, Korea University, Anam-dong, 136-701 Seoul, South Korea.
Artif Life. 2006 Fall;12(4):561-91. doi: 10.1162/artl.2006.12.4.561.
The body-brain coevolution of aerial life forms has not been developed as far as aquatic or terrestrial locomotion in the field of artificial life. We are studying physically simulated 3D flying creatures by evolving both wing shapes and their controllers. A creature's wing is modeled as a number of articulated cylinders, connected by triangular films (patagia). The wing structure and its motor controllers for cruising flight are generated by an evolutionary algorithm within a simulated aerodynamic environment. The most energy-efficient cruising speed and the lift and drag coefficients of each flier are calculated from its morphological characteristics and used in the fitness evaluation. To observe a wide range of creature size, the evolution is run separately for creatures categorized into three species by body weight. The resulting creatures vary in size from pigeons to pterosaurs, with various wing configurations. We discuss the characteristics of shape and motion of the evolved creatures, including flight stability and Strouhal number.
在人工生命领域，空中生命形式的身体与大脑协同进化尚未像水生或陆地运动那样得到充分发展。我们正在通过同时进化翅膀形状及其控制器来研究物理模拟的三维飞行生物。生物的翅膀被建模为多个由三角形薄膜（翼膜）连接的关节圆柱体。翅膀结构及其巡航飞行的电机控制器是在模拟空气动力学环境中通过进化算法生成的。根据每个飞行者的形态特征计算出最节能的巡航速度以及升力和阻力系数，并将其用于适应性评估。为了观察广泛的生物尺寸范围，针对按体重分为三个物种的生物分别进行进化。最终产生的生物大小从鸽子到翼龙不等，具有各种翅膀配置。我们讨论了进化生物的形状和运动特征，包括飞行稳定性和斯特劳哈尔数。
