Inventor: Michael R. Elgersma

Address: Plymouth, MN
No. of patents: 19
Last patent issue date: 01/01/2013

Number	Title	Issue Date
8344303	Projectile 3D attitude from 3-axis magnetometer and single-axis accelerometer A method to determine roll angle, pitch angle, and heading angle of a spinning projectile during a flight of the spinning projectile is provided. The method includes providing a magnetic unit vector in an inertial frame of the projectile at a projectile launch locat...	01/01/2013
8306676	Systems and methods for differential altitude estimation utilizing spatial interpolation of pressure sensor data Systems and methods for differential altitude estimation utilizing spatial interpolation of pressure sensor data are provided. In one embodiment, a method for mobile navigation comprises: measuring a horizontal location of a mobile navigation unit to generate two-di...	11/06/2012
8078399	Method and device for three-dimensional path planning to avoid obstacles using multiple planes An obstacle-avoidance-processor chip for three-dimensional path planning comprises an analog processing circuit and at least two analog-resistive-grid networks. The analog processing circuit is communicatively coupled to receive data from an inertial measurement uni...	12/13/2011
7979174	Automatic planning and regulation of the speed of autonomous vehicles An autonomous vehicle comprises one or more sensors configured to obtain data regarding conditions which affect movement of the autonomous vehicle; a speed planner coupled to the one or more sensors and configured to calculate a desired speed based, at least in part...	07/12/2011
7974460	Method and system for three-dimensional obstacle mapping for navigation of autonomous vehicles A method and system for obstacle mapping for navigation of an autonomous vehicle is disclosed. The method comprises providing an autonomous vehicle with an image capturing device, and focusing the image capturing device at a predetermined number of different specifi...	07/05/2011
7852463	Range measurement device A range measurement device is disclosed. The device comprises a flash laser radar configured to produce a first laser pulse at a first time. The device receives, at a second time, reflections of the first laser pulse from at least one object within a 360 degree fiel...	12/14/2010
7693619	Method and system for controlling sets of collinear control moment gyroscopes with offset determination without attitude trajectory of spacecraft A control system of a spacecraft for controlling two or more sets of collinear control moment gyroscopes (CMGs) comprises an attitude control system. The attitude control system is configured to receive a command to adjust an orientation of the spacecraft, determine...	04/06/2010
7486228	Methods and systems for piecewise curve fitting or radar altimeter range gate data A method for compensating for range gate slide with respect to received returns within a radar altimeter is described. The method includes adjusting the amount of overlap between a range gate pulse and a radar return signal until an altitude output by the radar alti...	02/03/2009
7464899	Method and system for determining a singularity free momentum path A method for avoiding singularities in the movement of CMGs in an array of CMGs in a spacecraft includes a first step where a maneuver command to rotate a spacecraft orientation is received. Then, the torque needed to rotate the spacecraft's orientation is determine...	12/16/2008
7389686	Methods and systems for determining air data parameters An air data system is described that includes a cone-shaped probe, a plurality of pressure transducers, and a processing device. The cone-shaped probe includes a first pressure port formed in a substantial tip of the probe and extending therethrough, and a plurality...	06/24/2008
7370833	Method and system for determining a singularity free momentum path A method for avoiding singularities in the movement of a set of collinear CMGs in an array of CMGs in a spacecraft is provided. First, a command to adjust an orientation of the spacecraft is received. Then, the momentum needed from the set of collinear CMGs is deter...	05/13/2008
7284420	Air data system and method for rotary aircraft An air data system and method for a rotary aircraft is described. The air data system includes a plurality of flush ports connected via tubing to a plurality of air flow sensors that can measure air flow speeds as low as approximately 0.02 knots. The flush ports are...	10/23/2007
6570377	Systems and method for determining proximity sensor characteristics A system and method for determining characteristics of a proximity sensor. According to a preferred embodiment, the admittance of a proximity sensor/cable assembly is measured at two frequencies. Assumptions about sensor characteristics and cable characte...	05/27/2003
6563461	System, method, and software for non-iterative position estimation using range measurements The typical global positioning system (GPS) estimates the three-dimensional, global position of a radio receiver and associated vehicle, such as an aircraft, using the range measurements between the radio receiver and a set of earth-orbiting satellite tra...	05/13/2003
6543146	Electronic compass and compensation of large magnetic errors for operation over all orientations A three-axis algebraic model is used to numerically compensate for magnetic errors in measured magnetic field values in an electronic compass for any orientation of the compass. This model is based on physical principles and uses a linear algebra approach...	04/08/2003
6532422	Simultaneous injection method and system for a self-balancing rotatable apparatus A method and system for balancing a rotating device or rotating system having a rotatable member and a shaft attached to the rotatable member, such that balancing is based on system response to simultaneous control actions to place mass, such as for examp...	03/11/2003
6288472	Electrostatic/pneumatic actuators for active surfaces An actuator device providing an active surface. The actuator has an electrostatic electrode for electrostatic cooperative action with an opposing electrostatic electrode. The cover has at least one second electrostatic electrode for cooperative electrosta...	09/11/2001
6215221	Electrostatic/pneumatic actuators for active surfaces An actuator device providing an active surface. The actuator has a base having at least one first electrostatic electrode mounted therein which is oriented for electrostatic cooperative action with an opposing electrostatic electrode in a cover mounted ab...	04/10/2001
5561993	Self balancing rotatable apparatus A system for balancing a rotatable member is provided by measuring forces and motion via accelerations at various locations of the system. The forces and moments are balanced through the use of matrix manipulation to determine appropriate counterbalance f...	10/08/1996

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Inventor: Michael R. Elgersma