A Hierarchical Architecture for the Adaptive Mode Transition Control of Unmanned Aerial Vehicles

2003 ◽  
Author(s):  
Luis Gutierrez ◽  
George Vachtsevanos ◽  
Bonnie Heck
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Hierarchical Architecture ◽  
Mode Transition ◽  
Transition Control ◽  
Aerial Vehicles ◽  
Mode Transition Control

Robust mode transition control of four-wheel-drive hybrid electric vehicles based on radial basis function neural network estimation-a simulation study

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ling Li ◽  
Fazhan Tao ◽  
Zhumu Fu
Keyword(s):  
Dynamic Performance ◽  
Transition Process ◽  
Mode Transition ◽  
Robust Controller ◽  
Content Type ◽  
Engine Torque ◽  
Transition Control ◽  
Wheel Drive ◽  
Mode Transition Control ◽  
Four Wheel Drive

Purpose The flexible mode transitions, multiple power sources and system uncertainty lead to challenges for mode transition control of four-wheel-drive hybrid powertrain. Therefore, the purpose of this paper is to improve dynamic performance and fuel economy in mode transition process for four-wheel-drive hybrid electric vehicles (HEVs), overcoming the influence of system uncertainty. Design/methodology/approach First, operation modes and transitions are analyzed and then dynamic models during mode transition process are established. Second, a robust mode transition controller based on radial basis function neural network (RBFNN) is proposed. RBFNN is designed as an uncertainty estimator to approximate lumped model uncertainty due to modeling error. Based on this estimator, a sliding mode controller (SMC) is proposed in clutch slipping phase to achieve clutch speed synchronization, despite disturbance of engine torque error, engine resistant torque and clutch torque. Finally, simulations are carried out on MATLAB/Cruise co-platform. Findings Compared with routine control and SMC, the proposed robust controller can achieve better performance in clutch slipping time, engine torque error, vehicle jerk and slipping work either in nominal system or perturbed system. Originality/value The mode transition control of four-wheel-drive HEVs is investigated, and a robust controller based on RBFNN estimation is proposed. Compared results show that the proposed controller can improve dynamic performance and fuel economy effectively in spite of the existence of uncertainty.

Distributed parameter control arithmetic for an axisymmetrical dual-mode scramjet

2008 ◽  
Vol 112 (1135) ◽  
pp. 557-565 ◽  
Author(s):  
C. Tao ◽  
Y. Daren ◽  
B. Wen
Keyword(s):  
Control Theory ◽  
Shape Control ◽  
Distributed Parameter ◽  
Mode Transition ◽  
Dual Mode ◽  
Transition Control ◽  
Wide Range ◽  
Mode Transition Control ◽  
Control Arithmetic ◽  
Smooth Transitions

AbstractDual-mode scramjet is one of the candidates for hypersonic flight propulsion system which will be used in wide range of flight Mach numbers from 4 to 12 or higher, wherein dual-mode scramjet should be well designed to be suitable for subsonic/supersonic combustion operation according to the flight conditions. Therefore this system is required to operate in a finite number of operational modes that necessitate robust, stable, and smooth transitions between them by which selective operability of supersonic/subsonic combustion modes and efficient combustor operation in these modes may be realised. A key issue in making mode transition efficient and stable is mode transition control. The major problem in mode transition control is the handling of the various flow and combustion coupling effects of dual-mode scramjet whose physical states are spatially coupled and whose governing equations are partial differential equations. Involving these distributed parameter issues, our basic idea is using the shape control theory to study the control problems of mode transition for dual-mode scramjet with the aim of achieving the desirable design properties and increasing control reliabilities. This specific approach is motivated by the promise of novel techniques in control theory developed in recent years. Concrete control arithmetic of this approach, such as shape control model, sensitivity analysis and gradient-based optimisation procedure, are given in this paper. Simulation results for an axisymmetric, wall-injection dual-mode scramjet show the feasibility and validity of the method.

A low-order adaptive engine model for SI–HCCI mode transition control applications with cam switching strategies

2015 ◽  
Vol 17 (4) ◽  
pp. 451-468 ◽  
Author(s):  
Patrick Gorzelic ◽  
Prasad Shingne ◽  
Jason Martz ◽  
Anna Stefanopoulou ◽  
Jeff Sterniak ◽  
...  
Keyword(s):  
Mode Transition ◽  
Control Applications ◽  
Transition Control ◽  
Engine Model ◽  
Mode Transition Control ◽  
Switching Strategies ◽  
Low Order
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