Hybrid extended state observer based control for systems with matched and mismatched disturbances

Area of Science:

• Control Engineering
• Systems Theory

Background:

• Conventional Extended State Observer-Based Control (ESOBC) is limited to Integral Chain Form (ICF) systems with single-channel, matched disturbances.
• Many real-world control systems feature non-ICF structures and multi-channel, both matched and mismatched, disturbances, rendering conventional ESOBC inadequate.

Purpose of the Study:

• To develop an upgraded control strategy that overcomes the limitations of conventional ESOBC.
• To enhance the feasibility and applicability of Extended State Observer-Based Control for complex disturbance scenarios.

Main Methods:

• Hybridizing the conventional Extended State Observer-Based Control (ESOBC) with the Generalized Extended State Observer-Based Control (GESOBC).
• Introducing the proposed Hybrid Extended State Observer-Based Control (HyESOBC) scheme.
• Validating the scheme through simulation and comparative analysis on numerical and practical examples with dual-channel disturbances.

Main Results:

• The proposed HyESOBC scheme demonstrates capability in estimating and controlling multi-channel lumped disturbances, including both matched and mismatched types.
• The method is applicable to a broader range of systems, including those with non-ICF structures.
• Simulation and analysis confirm the enhanced feasibility and applicability of the HyESOBC scheme.

Conclusions:

• The Hybrid Extended State Observer-Based Control (HyESOBC) offers a significant advancement over conventional ESOBC.
• This novel approach effectively addresses complex disturbance conditions prevalent in practical control applications.
• The HyESOBC scheme provides a robust and versatile solution for advanced control system design.