Journal ArticleDOI
Constrained Control Allocation
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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
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Journal ArticleDOI
The impact of control allocation on trim drag of blended wing body aircraft
Crispijn Huijts,Mark Voskuijl +1 more
TL;DR: In this paper, the impact of three control allocation methods on the trim drag of a blended wing body aircraft configuration at relatively low airspeeds was investigated by a wind tunnel test campaign.
Proceedings ArticleDOI
Resource balancing control allocation
Susan A. Frost,Marc Bodson +1 more
TL;DR: The paper shows how the problem can be solved effectively by converting it into a linear program and solving it using a simplex algorithm, which results in a type of resource balancing, where the resources are the control surfaces and the algorithm balances these resources to achieve the desired command.
Journal ArticleDOI
Minimum Drag Control Allocation
TL;DR: Simulation results show that while minimum drag allocation is not an optimization algorithm, it continuously drives the controls toward their minimum drag configurations while satisfying the control law moment demands during maneuvers.
Journal ArticleDOI
Anti-disturbance attitude control of combined spacecraft with enhanced control allocation scheme
TL;DR: A saturated approach is adopted to guarantee the global asymptotic stability under control input saturation and a nonlinear disturbance observer is constructed to compensate the disturbances caused by inertial parameter uncertainty and unmodeled dynamics.
Proceedings ArticleDOI
Production support flight control computers: research capability for F/A-18 aircraft at Dryden Flight Research Center
TL;DR: A functional description of the Production Support Flight Control Computers, working with the United States Navy to complete ground testing and initiate flight testing of a modified set of F/A-18 flight control computers, is presented.
References
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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.