16,928 research outputs found
EEOC v. Henley Enterprises, Inc. d/b/a Valvoline Instant Oil Change & Mid-Atlantic Lubes, LCC d/b/a Valvoline Instant Oil Change
Equal Employment Opportunity Commission v. First American Management, Inc., Consolidated Management Group, Inc.,
New mode switching algorithm for the JPL 70-meter antenna servo controller
The design of control mode switching algorithms and logic for JPL's 70 m antenna servo controller are described. The old control mode switching logic was reviewed and perturbation problems were identified. Design approaches for mode switching are presented and the final design is described. Simulations used to compare old and new mode switching algorithms and logic show that the new mode switching techniques will significantly reduce perturbation problems
A new linear quadratic optimal controller for the 34-meter high efficiency antenna position loop
The design of a new position loop controller for the 34-meter High Efficiency Deep Space antennas using linear quadratic (LQ) optimal control techniques is discussed. The LQ optimal control theory is reviewed, and model development and verification are discussed. Families of optimal gain vectors are generated by varying weight parameters. Performance specifications were used to select a final gain vector. Estimator dynamics were selected and the corresponding gain vectors were computed. Final estimator selection was based on position, commanded rate, and estimator error responses
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