Design embedded control system based controller of the quasi time optimization approach for a magnetic levitation system

Abstract

The magnetic levitation system is a typical system with many successful applications in practice. Due to the inherent instability and strong open-loop nonlinearity of the MLS, a controller is used to control the stability of the magnetic levitation system. With the rapid development of embedded systems, the intelligent digital control has begun to replace conventional analog control technology creating a new approach to the control MLS. This paper proposes a hardware module for the MLS based on a digital signal processor combined with a fast acting controller to ensure system stability even with incomplete mathematical models. The simulation and experimental results are compared with the linearized feedback control law. Finally, experiments are carried out to test the practical feasibility of the proposed control laws in the MLS embedded control system. The system, with the recommended controller, well responds to the tolerances allowing for stable system working. Both simulation and test results are included in this paper to show that the fast acting suboptimal controller has the advantage of being more durable and less complicated to perform in MLS control applications.

Synthesis of control laws for magnetic levitation systems based on serial invariant manifolds

“…The distance between the ball and the electromagnet is determined by the Hall effect sensor. Based on [10,11], the mathematic model of MLS has form as in (1) The inductance of the coil is a function of the position of the ball, determined as (2) [10],…”

“…When the system enters the manifold, the performance point of the system touches the intersection of the 𝜓 1 = 0 manifold, then the system will have a dynamic decomposition of the system (3) and the dynamics of the closed loop system are described by (10).…”

“…A fuzzy logic controller for MLS is presented in [9]. In [10], quasi-time optimal controllers based on dynamic adaptation are proposed and tested. However, these controllers suffer from the limitation of  ISSN: 2722-2586 being very sensitive to the initial conditions, as well as to noise effects and changes in the parameters of the system.…”

Design of Measurement and Control System for Small Electromechanical Airplane Jack Based on Embedded Technology

“…As an important tool for lifting and supporting, the jack is widely used in mine lifting, tunnel bridges, the petrochemical industry, transportation, and maintenance of aerospace equipment [1]. It mainly works in practice with steel jacking parts as the basic assembly, using the upper part of the body of the bracket or the lower part of the claw to complete the jacking action of the tested object within the effective working range.…”