Abstract: An active suspension system for a vehicle including elements for developing and executing a trajectory plan responsive to the path on which the vehicle is traveling. The system may include a location system for locating the vehicle, and a system for retrieving a road profile corresponding to the vehicle location.

Abstract: An active suspension system for a vehicle including elements for developing and executing a trajectory plan responsive to the path on which the vehicle is traveling. The system may include a location system for locating the vehicle, and a system for retrieving a road profile corresponding to the vehicle location.

Abstract: An actuator for an active suspension system includes an armature and a housing enclosing an interior. The interior has a volume that varies in response to movement of the armature. A wall of the housing forms a first aperture through which air passes in response to movement of the armature.

Abstract: An active suspension system for a vehicle including elements for developing and executing a trajectory plan responsive to the path on which the vehicle is traveling. The system may include a location system for locating the vehicle, and a system for retrieving a road profile corresponding to the vehicle location.

Abstract: A vehicle testing system includes a wheel plate constructed and arranged to support a vehicle wheel. A linear electromagnetic actuator has a moving magnet mechanically coupled to the wheel plate constructed and arranged to impart a controlled substantially vertical force to the wheel plate. A spring may be mechanically coupled to the wheel plate to support at least a portion of a static mass of the vehicle.

Abstract: A method for actively suspending a real plant in a vehicle includes modifying a control signal on the basis of a difference between a property of the real plant, as indicated by the response of the real plant to the control signal, and a property of a nominal plant.

Abstract: A method for actively suspending a real plant in a vehicle includes modifying a control signal on the basis of a difference between a property of the real plant, as indicated by the response of the real plant to the control signal, and a property of a nominal plant.

Abstract: An actuator for an active suspension system includes an armature and a housing enclosing an interior. The interior has a volume that varies in response to movement of the armature. A wall of the housing forms a first aperture through which air passes in response to movement of the armature.

Abstract: An electromagnetic transducer including a stator and an armature, the armature defining a first axis and being driven to ride between first and second couplers back and forth relative to the stator along the first axis. The second coupler is configured to permit movement of the armature along a second axis orthogonal to the first axis.

Abstract: An active suspension system for a vehicle including elements for developing and executing a trajectory plan responsive to the path on which the vehicle is traveling. The system may include a location system for locating the vehicle, and a system for retrieving a road profile corresponding to the vehicle location.

Abstract: An active suspension system for a vehicle including elements for developing and executing a trajectory plan responsive to the path on which the vehicle is traveling. The system may include a location system for locating the vehicle, and a system for retrieving a road profile corresponding to the vehicle location.

Abstract: An electromagnetic transducer includes a first member and a second member which are relatively slidable along a path having spaced endpoints and which are electromagnetically coupled. The second member has at least one winding which produces a magnetic field which penetrates the second member. The second member has a plurality of contiguous permanent magnets of alternate polarity along the path which establish a periodic magnetic field which reacts with the magnet field created by the first member so as to produce force along the path. The plurality of contiguous permanent magnets are disposed along the path such that transition lines dividing adjacent ones of the magnets are formed at a non-perpendicular angle to the path to allow gradual transition between flux directions.

Abstract: A digital absolute position encoder is provided for determining absolute position of a first member with respect to a second member. The absolute position is determined within a resolution cell of L/2.sup.n, where n is an integer and L is a predetermined span. One of the members has a plurality of, m, tracks of binary indicia distributed over the predetermined span, L, where m is an integer less than n. The other member has a plurality of indicia detectors disposed on the second member for detecting the binary indicia. With such an arrangement, an encoder is provided having "a unit-distance code", yet uses less tracks than that used with a conventional Gray code encoder. Further, the encoder has a reduced number of transitions than that required on the track used with a conventional Gray code encoder. Both of these features simplify the design and fabrication for a given encoder resolution.

Abstract: In a vehicle having a chassis and at least one wheel assembly, where the wheel assembly includes a wheel support member, a damping mass, a damping spring for connecting the damping mass to the wheel support member, and a mechanical resistive member in parallel with the damping spring, a suspension connecting the wheel assembly to the chassis, the suspension supporting the weight of the vehicle and isolating the wheel motion from the chassis motion, and at least one actuator for providing force between the wheel assembly and the chassis, the improvement provides a linear electric motor connected between the wheel assembly and the chassis, where the linear electric motor provides force between the wheel assembly and the chassis.