Journal ArticleDOI
Constrained Control Allocation
Reads0
Chats0
TLDR
In this article, the problem of the allocation of several airplane flight controls to the generation of specified body-axis moments is addressed, and a direct method of allocating these several controls is presented that guarantees the maximum possible moment can be generated within the constraints of the controls.Abstract:
This paper addresses the problem of the allocation of several airplane flight controls to the generation of specified body-axis moments. The number of controls is greater than the number of moments being controlled, and the ranges of the controls are constrained to certain limits. They are assumed to be individually linear in their effect throughout their ranges of motion and independent of one another in their effects. The geometries of the subset of the constrained controls and of its image in moment space are examined. A direct method of allocating these several controls is presented that guarantees the maximum possible moment can be generated within the constraints of the controls. It is shown that no single generalized inverse can yield these maximum moments everywhere without violating some control constraint. A method is presented for the determination of a generalized inverse that satisfies given specifications which are arbitrary but restricted in number. We then pose and solve a minimization problem that yields the generalized inverse that best approximates the exact solutions. The results are illustrated at each step by an example problem involving three controls and two moments.read more
Citations
More filters
Journal ArticleDOI
Fault-accommodating thruster force allocation of an AUV considering thruster redundancy and saturation
TL;DR: A framework that exploits the excess number of thrusters to accommodate thruster faults during operation is presented and is extended to incorporate a dynamic state feedback technique to generate reference thruster forces that are within the saturation limit of each thruster.
Journal ArticleDOI
Attitude takeover control for post-capture of target spacecraft using space robot
TL;DR: In this article, a reconfigurable control system is designed for attitude takeover control of target spacecraft, which considers the changes of the mass properties and reaction wheels' configuration, and a modified SDRE (Sate-Dependent Riccati Equation) optimal controller is proposed to guarantee the convergence of the steady-state position errors and velocity errors, and meanwhile move the closed-loop poles of system in order to provide a sufficient stability margin.
Journal ArticleDOI
Robust flight control design using dynamic inversion and structured singular value synthesis
Richard Adams,Siva S. Banda +1 more
TL;DR: The direct incorporation of design goals such as flying qualities requirements and the elimination of gain scheduling make this direct methodology an effective and efficient alternative to traditional flight control design approaches.
Journal ArticleDOI
Fuel-efficient rudder and propeller control allocation for marine craft: experiments with a model ship
TL;DR: An analytic, 2-norm optimal method that can ensure continuity of the solutions of the thrust allocation problem and its limitation is the capability of handling only configurations where one single thrust device is subject to sector constraints at a time.
Proceedings ArticleDOI
Reconfigurable Control Allocation against Aircraft Control Effector Failures
TL;DR: Simulation results show satisfactory results for accommodating the control effector failures and partial loss of control effectiveness faults have been implemented in the ADMIRE benchmark and used for evaluating the control re-allocation schemes.
References
More filters
Book
Modern Control Theory
TL;DR: The relationship between state variable and transfer function descriptions of linear feedback control systems is discussed in this paper, along with the relationship between the Cayley Hamilton Theorem and state variable descriptions of systems.
Journal ArticleDOI
Nonlinear inversion flight control for a supermaneuverable aircraft
TL;DR: In this article, the authors discuss the use of nonlinear dynamic inversion in the design of a flight control system for a Superman aircraft and compare it with a more conventional, gain-scheduled system and yield better performance in terms of lateral acceleration, sideslip, and control deflections.
Relative control effectiveness technique with application to airplane control coordination
TL;DR: In this paper, a method to select optimal combinations of the control variables of a linear system is reported, where the combinations are chosen so that the control channels have their principal influences on selected fundamental modes of the system.
Preliminary design study of a lateral-directional control system using thrust vectoring
TL;DR: In this article, a preliminary design of a lateral-directional control system for a fighter airplane capable of controlled operation at extreme angles of attack is developed, which is representative of a modern twin-engine high-performance jet fighter, equipped with ailerons, rudder, and independent horizontal-tail surfaces.