An improved genetic algorithm-particle swarm optimization (GA-PSO) was proposed to address the limitations of conventional algorithms in trajectory planning for 7-DOF hybrid-joint manipulators, including slow convergence, low accuracy, and the challenge of balancing smoothness with obstacle avoidance. A kinematic model was constructed based on a modified Denavit-Hartenberg (D-H) parameter method, followed by an analysis of the Cartesian workspace. A multi-objective fitness function incorporating jerk, energy consumption, and collision penalty was formulated. The algorithm was enhanced by initializing the population via improved Latin hypercube sampling, along with an exponentially decreasing inertia weight and adaptive crossover-mutation probabilities. After determining the optimal parameters through orthogonal experiments, comparative simulations were conducted against the sparrow search algorithm (SSA) and the whale optimization algorithm (WOA) under both noise-free and 0-20% Gaussian noise conditions. Results show that in noise-free environments, the improved GA-PSO achieved a median comprehensive fitness of 300, only one-fourth that of SSA and one-seventh that of WOA, while generating smooth joint trajectories without abrupt changes. Under 20% noise intensity, its fitness variation rate remained at 4.85%, demonstrating significantly superior robustness. The proposed algorithm provides an effective solution for high-precision trajectory planning of multi-degree-of-freedom manipulators.
LI Xing-hua, LI Ke-jun, DENG Min-ya, WANG Bo, ZHANG Lang, CHEN Miao-lin.
Trajectory Planning of a 7-DOF Manipulator Using Genetic Algorithm-Particle Swarm Optimization[J].
Science Technology and Engineering, 2026, 26(21): 8882-8892 DOI:10.12404/j.issn.1671-1815.2507360
JiangXiaoliang. Precise control method for industrial robots based on intelligent manufacturing[J]. Standardization and Quality of Machinery Industry, 2025(4): 53-57.
XieMan, WangLongtao, ChenZhongyin, et al. Coordinated control of real-virtual integrated robotic arm and digital twin[J]. Journal of Ordnance Equipment Engineering, 2024, 45(11): 243-252.
LiuXuliang. Research on adaptive collaborative control methods for multi-arm intelligent manufacturing robots[J]. Manufacturing Automation, 2022, 44(1): 110-113.
[7]
NohD, LiuY, RafeediF, et al.Minimal degree of freedom dual-arm manipulation platform with coupling body joint for diverse cooking tasks[C]//2020 17th International Conference on Ubiquitous Robots (UR). Kyoto: IEEE, 2020: 225-232.
[8]
KnightH, SimmonsR. Expressive motion with x, y and theta: laban effort features for mobile robots[C]// The 23rd IEEE International Symposium on Robot and Human Interactive Communication. Edinburgh: IEEE, 2014: 267-273.
[9]
WuN, JiaD, LiZ, et al.Kinematic analysis and trajectory planning for low-degree-of-freedom robotic manipulators[C]//2024 2nd International Conference on Artificial Intelligence and Automation Control (AIAC). Guangzhou: IEEE, 2024: 42-48.
WangYawei, HeJinli, LinXimiao, et al. Design and experiment of a telescopic robotic arm for greenhouse tomato harvesting[J]. Journal of Agricultural Machinery, 2024, 55(S1): 18-28.
FanPu, HuHaidong, YaoLejia, et al. Research on modeling and trajectory planning of hybrid-structure flexible manipulator[J]. Computer Simulation, 2025, 42(5): 360-366.
TangZhaoping, MengXin, SunJianping, et al. Time-optimal trajectory planning for palletizing robots based on an improved whale optimization algorithm[J]. Science, Technology and Engineering, 2024, 24(14): 5882-5891.
ZhaoTao, HeYanni, GaoYonghang, et al. Trajectory planning for a three-degree-of-freedom under-constrained flexible cable-driven parallel robot[J]. Science Technology and Engineering, 2024, 24(19): 8142-8149.
[20]
LiX, JiangQ, ZhangJ, et al. Multiobjective optimal trajectory planning for robotic arms based on PAD-MOPSO[J]. Automatic Control and Computer Sciences, 2025, 59(4): 541-550.
[21]
ZhangH, XieB, YangB, et al. A trajectory planning method of robotic manipulators based on an improved multi-objective particle swarm optimization algorithm[J]. Journal of Physics: Conference Series, 2025, 3032(1): 012011.
[22]
ZhangM, LiuJ, WuY, et al. Multi-objective trajectory planning for robotic arms based on MOPO algorithm[J]. Electronics, 2025, 14(12): 2371.
LiLing, HouYulong, LiYao, et al. Multi-objective trajectory optimization method for robotic arms based on improved sparrow search algorithm[J]. Journal of Engineering Design, 2025, 32(5): 664-674.
[25]
工业机器人行业规范条件[J]. 机器人技术与应用, 2017(1): 20-22.
[26]
Industrial robot industry standard conditions[J]. Robot Technology and Application, 2017(1): 20-22.