Design of Backstepping Control Based on a Softsign Linear–Nonlinear Tracking Differentiator for an Electro-Optical Tracking System

• DOI: 10.3390/photonics11020156
• Publication Date: 2024-02-06T08:22:31Z
• Authors: Jiachen Li; Shanlin Zhuang; Haolin Wang; Jiuqiang Deng; Yao Mao
• Keywords: Differentiator; Tracking (education)

To address the problems of a low tracking accuracy and slow error convergence in high-order single-input, single-output electro-optical systems, backstepping control method based on Softsign linear–nonlinear differentiator is proposed. First, designed conjunction with excitation function, using its output as an approximate replacement for conventional differentiation process. Then, this combined to eliminate “explosion complexity” problem procedures due repeated derivation virtual quantities. This reduces workload parameter tuning, takes into account rapidity stability signal convergence, improves trajectory performance. can ensure boundedness system signal. The effectiveness superiority are verified through simulations experiments.