Abstract: Systems and methods are disclosed herein for an aircraft seat with a decoupled linear actuator. The linear actuator may activate a first adjustable feature by moving in a first direction. The linear actuator may include a decoupling mechanism. The decoupling mechanism may decouple the first adjustable feature from the linear actuator in response to loss of power to the linear actuator.

Abstract: A seat actuation control system is disclosed. The seat actuation control system may permit multiple functions to be controlled by a single actuator. For example, a seat floor tracking function, and a seat pan track and swivel function may be individually controlled by a single actuator, such as a rotary actuator.

Abstract: In various embodiments, a drive system with a motor rotary actuator driven linkage and an override system is provided. The override system may be a manually actuated override system that, in response to a power loss or outage, is configured to disengage one or more links of drive system 100 from the electric motor rotary actuator, allowing the disengaged link to be moved and/or repositioned. Moreover, drive system 100 and, more specifically, the override system may be configured to restore normal operation to the disengaged link in response to power being restored (i.e., by reengaging the link).

Abstract: A bi-directional linear clutch lock is provided that may selectively restrain a rack from translating. A bi-directional rotary clutch lock is provided that may selectively restrain a rotary rack from rotating.

Abstract: Systems and methods are disclosed herein for reclining seats. A seat may have a seat back, a seat bottom, and a spine within the seat back and seat bottom. The seat bottom may be coupled to a base. The seat bottom may translate relative to the base. The seat may include a guide ramp coupled to the base. A portion of the spine may be located within the guide ramp. In response to translation of the seat bottom, the guide ramp may apply a torque on the spine, causing the seat back to recline.

Abstract: A method for examining an input signal and setting a modulation domain measuring instrument to a state which will produce a measurement and a stable, centered, properly scaled display of the signal, automatically. After finding the 50 percent voltage threshold of the input signal, an iterative process determines the minimum and maximum input frequency, then checks the ratio of these two frequencies against instruments limits, and adjusts the display values, if necessary to show only the higher frequencies. The method then varies the measurement parameters to seek the best frequency resolution while maintaining the measurement and display of frequency modulation. The display frequency scale is set to display the signal in the center half of the display, using values with no more than two significant digits for the center and span. The time scale is set to display a selected number of modulation cycles.

Abstract: A method and apparatus makes rapid frequency measurements by measuring time intervals for a series of blocks of event counts with the number of events in each block held constant. This makes the numerator of the events/time relationship constant so it does not have to be measured, processed or stored. The frequency of the signal is determined by measuring the time interval, then taking the inverse of the measured value and multiplying by the appropriate constant. A fast inverse circuit uses a Taylor series expansion technique implemented in digital circuit, with the slope resolution adjusted for regions of small slope to improve accuracy.

Abstract: A method for examining an input signal and setting a modulation domain measuring instrument to a state which will produce a measurement and a stable, centered, properly scaled display of the signal, automatically. After finding the 50 percent voltage threshold of the input signal, an iterative process determines the minimum and maximum input frequency, then checks the ratio of these two frequencies against instruments limits, and adjusts the display values, if necessary to show only the higher frequencies. The method then varies the measurement parameters to seek the best frequency resolution while maintaining the measurement and display of frequency modulation. The display frequency scale is set to display the signal in the center half of the display, using values with no more than two significant digits for the center and span. The time scale is set to display a selected number of modulation cycles.

Abstract: The relative occurrence of first and second input signals is determined by sampling the output signal of a comparator which compares a predetermined voltage source output signal with the output signal from a ramp generator which is triggered by the first input signal. The sampling signal is provided in response to the second input signal after a preselected time delay. A balancing calibration is used to insure that if the signals are coincident, the ramp generator signal is equal to the voltage reference signal at the moment of sampling. Therefore, the precedence of the first and second input signals is determined by sampling the comparator output signal in response to the sampling signal and determining the relative values of the ramp voltage signal and the voltage reference signal at the time of sampling.