Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"Adaptive control systems"”.
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Model reference adaptive control systems using a dead zone non-linearity
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1985.
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Information fusion schemes for real time risk assessment in adaptive control systems
Intelligent Flight Control System (IFCS) deploys a neural network for in-flight aircraft failure accommodation. Verification and validation (V&V) of adaptive systems is a challenging research problem. Our approach to V&V relies on real-time monitoring of neural network learning. Monitors detect …
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Robustness of adaptive control systems to unmodeled dynamics : a describing function viewpoint
… it was shown that a standard model reference adaptive controller modified with a suitably tuned projection algorithm ensures robustness (global boundedness) of the overall adaptive system to a class of unmodeled dynamics with minimal restrictions. However, extensive first-principle based …
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Event-triggering architectures for adaptive control of uncertain dynamical systems
… for the design and implementation of networked adaptive control systems to reduce the wireless network utilization while guaranteeing system stability in the presence of system uncertainties. Specifically, the design and analysis of state feedback adaptive control systems over wireless networks …
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Design and evaluation methodology for computer-controlled manufacturing systems
… determine cost"effective hierarchical computer control network designs for flexible manufacturing systems. By modeling the hierarchical control system (HCS) as a resource allocation problem, an optimal hardware configuration is identified using dynamic programing. Being independent of specific …
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Estudo de sistemas de controle a estrutura variável
Study of a class of adaptive control systems: the Variable Structure Control Systems. A control system is said to be of variable structure if the structure and/or the parameters of the controller varies, the parameters variations being discontinuous, depending on the state, and/or the perturbations …
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Adaptive Identification of Nonlinear Systems
… for parameter identification for nonlinear systems. The methods presented are expanded from those presented in Adetola and Guay [3, 4, 5] and are intended to improve the performance of existing adaptive control systems. The first two methods exactly recover open-loop system parameters once a …
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Design of Adaptive Vibration Control Systems with Applicaion to Magneto-Rheological Dampers
The design of nonlinear adaptive control systems for reducing vibration transmission in applications such as transportation systems is discussed. The systems studied include suspension systems, such as those used in vehicles, employing nonlinear magneto-rheological (MR) dampers that are controlled …
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Towards verifiable adaptive control for safety critical applications
… implementable in safety critical applications, adaptive controllers must be shown to behave strictly according to predetermined specifications. This thesis presents two tools for verifying specifications relevant to practical direct-adaptive control systems. The first tool is derived from an …
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Adaptively prestressed concrete structures
… to only one dominant loading condition. Adaptive structures in contrast can deal with multiple loading conditions and unanticipated events at the same time. Truly adaptive civil structures do not exist. Concrete structures can be made adaptive through variable prestressing. Design …
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A control system design technique for nonlinear discrete time systems
A new control methodology is proposed for use with a class of nonlinear, single-input discrete time systems. The technique is based on a discrete time approach that parallels existing continuous time sliding surface concepts. Modifications to the basic algorithm allow for system models with …
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Applications of almost periodic functions and equivalent nonlinearities to identification and control of nonlinear systems
… techniques for the identification of nonlinear systems are discussed in Chapter 1. The Volterra series expansion of the response of a nonlinear system is described, together with its counterpart in the frequency domain. Qosscorrelation methods for identifying the kernel functions which occur in …
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Advances in grasping and vehicle contact identification : analysis, design and testing of robust methods for underwater robot manipulation
… productivity of autonomous and telemanipulation systems consisting of a manipulator arm mounted to a free flying underwater vehicle. Part I minimizes system sensitivity to misalignment by developing a gripper and a suite of handles that passively self align when grasped. After presenting a …
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Neural network based adaptive control for autonomous flight of fixed wing unmanned aerial vehicles
… collection and processing units based on micro-controller and PC104 architectures are developed and discussed. These units are also used to program the identification and control algorithms. Flight control of fixed wing UAVs is a challenging task due to the coupled, time-varying, nonlinear …
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Design and control of a cellular architecture-based adaptive wiring manifold
… wiring manifold. The useful properties of this adaptive wiring system include design time reduction by orders of magnitude over traditional wiring harness implementations, the potential of self-healing/diagnostics, and soft-definable probe signals to aid in discovery of component faults. …
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A Multi-DOF Soft Robot Mechanism for Patient Motion Correction and Beam Orientation Selection in Cancer Radiation Therapy
… orientations. State-of-the-art immobilization systems rely on metallic or rigid masks which lack morphological properties, attenuate ionizing radiation, degrade dose efficacy, and are uncomfortable for the patient during treatment. The de-facto open-loop and deferred positioning procedures …
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