Gordon G. Parker

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Offline crane maneuvers, resulting in zero residual payload swing, have been explored previously using parameterized sets of basis functions. Assumptions usually included an ideal servo response and symmetric inputs. Nonsymmetric maneuvers, in general, do not have closedform basis function solutions. Actuator dynamics further complicate maneuver generation(More)
In the course of exploiting spacecraft formations for use in separated interferometry (or other missions), it is possible that the separation distance between vehicles will be on the order of ten meters. This paper investigates the effects of spacecraft charging on the dynamics of very closely spaced formations. For certain high Earth orbits, the ambient(More)
A method of sliding mode control (SMC) is proposed for the control of flexible, nonlinear, and structural systems. The method departs from standard sliding mode control by dispensing with generalized accelerations during the control law design. Global, asymptotic stability of rigid body motion is maintained if knowledge on the bounds of the neglected terms(More)
One of the barriers to fielding a military hybrid vehicle is the absence of a holistic view of a vehicle’s energy. This paper introduces the concept of treating a military vehicle as a microgrid and utilizing energy optimization methods from stationary microgrids, namely battery state of charge (SOC) optimization. This analysis illuminates the comprehensive(More)
This paper will present the model formulation and testing for the integration of renewable energy into networked ac bus microgrid. This paper presents a model of an inverter based ac microgrid that is appropriate for use in advanced control schemes, such as Hamiltonian Surface Shaping and Power Flow Control (HSSPFC). A two inverter three phase ac system(More)