Abstract
A diesel engine is a typical dynamic system. In this paper, a dynamics method is proposed to establish the Hamiltonian model of the diesel engine, which solves the main difficulty of constructing a Hamiltonian function under the multi-field coupling condition. Furthermore, the control method of Hamiltonian model structure modification is introduced to study the control of a diesel engine. By means of the principle of energy-shaping and Hamiltonian model structure modification theories, the modified energy function is constructed, which is proved to be a quasi-Lyapunov function of the closed-loop system. Finally, the control laws are derived, and the simulations are carried out. The study reveals the dynamic mechanism of diesel engine operation and control and provides a new way to research the modeling and control of a diesel engine system.
Highlights
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Department of Engineering Mechanics, Kunming University of Science and Technology, Abstract: A diesel engine is a typical dynamic system
Based on the established Hamiltonian model, the control method of Hamiltonian model structure modification is introduced to study the control of the diesel generator sets (DGSs), which shows the effectiveness of the structure modification method in the application of the Hamiltonian system
The modeling and control of a diesel engine are studied from the perspective of Hamiltonian dynamics
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Taking the port-controlled Hamiltonian (PCH) system as an example, the literature [22] has proposed a Hamiltonian control method of structure modification, which effectively avoids the difficulty of constructing the modified energy function, and the control laws are formed with a stabilizing control and an additional control at the given equilibrium point. Under the condition of guaranteeing the stability of the system at the equilibrium point, the control law of the diesel engine system is obtained by the structure and damping modified. A dynamic method is proposed to establish the Hamiltonian model of the diesel engine, which solves the main difficulty of constructing the Hamiltonian function. This method provides a new way for the modeling of other devices based on dynamics theory. Based on the established Hamiltonian model, the control method of Hamiltonian model structure modification is introduced to study the control of the DGS, which shows the effectiveness of the structure modification method in the application of the Hamiltonian system
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