Abstract:
A real time simulation method for jamming and anti-jamming evaluation of GPS systems and GPS/IMU integrated systems includes the steps of receiving real time trajectory data from a 6DOF trajectory generator and generating jamming signals, global positioning system simulated measurements, and inertial measurement unit simulated electronic signals which are injected into an on-board integrated global positioning system/inertial measurement unit system. When the on-board integrated global positioning system/inertial measurement unit system is excited in dynamic operation, a performance under various jamming conditions is able to be tested and evaluated as if carrying a real transportation test under a real jamming environment.
Abstract:
A system and method for precision operational control of automated machines includes a motion element, an IMU (Inital Measuring Unit) installed at an end effector of the motion element for sensing and providing a motion measurement of the motion element, a central control processor receiving output of the IMU and producing commands, and a motion actuator receiving the commands from the central control processor to control the movement of the end effector of the motion element, so as to enable autonomous/intelligent control of the automated machine's end effector by incorporating the IMU to permit direct servo-control of the end effector's acceleration, velocity, angular rate. and angle—this closed-loop system minimizes effects of such disturbances like mechanical flexing and bending due to loading and nonlinear torques due to hydraulic components.
Abstract:
A processing method for motion measurement, which is adapted to be applied to output signals proportional to rotation and translational motion of the carrier, respectively from angular rate sensors and acceleration sensors, is more suitable for emerging MEMS (MicroElectronicMechanicalSystem) angular rate and acceleration sensors. Compared with a conventional IMU, the present invention utilizes a feedforward open-loop signal processing scheme to obtain highly accurate motion measurements by means of signal digitizing, temperature control and compensation, sensor error and misalignment calibrations, attitude updating, and damping control loops, and dramatically shrinks the size of mechanical and electronic hardware and power consumption, meanwhile, obtains highly accurate motion measurements.
Abstract:
An enhanced positioning method and system with altitude measurement includes the steps of receiving the inertial measurements from an inertial sensor, the global positioning system raw measurements from a global positioning system processor, and the altitude measurement from an altitude measurement device and performing integrated filtering, feeding the velocity and acceleration back to the global positioning system satellite signal tracking loops, and using integration solution to aid the global positioning system satellite signal carrier phase ambiguity resolution. The present invention provides a positioning method and system with high accuracy and robustness. The global positioning system measurements assure the long term positioning accuracy and the inertial measurements assure the short term positioning accuracy. The altitude measurement improves the vertical positioning accuracy. The velocity and acceleration from the inertial device aid the global positioning system signal tracking. The integrated positioning solution is employed to derive the global positioning system carrier phase ambiguity number. The present patent supports high precision navigation in general aviation and space applications. It also supports high precision approach and landing for aircraft, reusable launch vehicles, and other air transportation vehicles.
Abstract:
A vehicle positioning and data integrating process and system can substantially solve the problems encountered in avionics system integration, which employs integrated global positioning system/inertial measurement unit enhanced with altitude measurements to derive vehicle position, velocity, attitude, and body acceleration and rotation information. A vehicle positioning and data integrating system comprises navigation sensors and an IMU interface and preprocessing board, an altitude interface and processing board, a navigation processing board, a shared memory card, a bus arbiter, a control board, and a bus interface. The control board distributes navigation data to flight management system, flight control system, automatic dependent aurveillance, cockpit display, enhanced ground proximity warning system, weather radar, and satellite communication system.
Abstract:
An improved fully-coupled vehicle positioning process and system thereof can substantially solve the problems encountered in global positioning system-only and inertial navigation system-only, such as loss of global positioning satellite signal, sensibility to jamming and spoofing, and inertial solution's drift over time, in which the velocity and acceleration from an inertial navigation processor are used to aid the code and carrier phase tracking of the global positioning system satellite signals, so as to enhance the performance of the global positioning and inertial integration system, even in heavy jamming and high dynamic environments. The improved fully-coupled GPS/IMU vehicle positioning system includes an IMU (inertial measurement unit) and a GPS processor which are connected to a central navigation processor to produce navigation solution that is output to an I/O (input/output) interface.
Abstract:
A coupled real time emulation method for positioning and location system includes the steps of receiving real time trajectory data from a 6DOF trajectory generator and generating global positioning system simulated measurements and inertial measurement unit simulated electronic signals which are injected into an on-board integrated global positioning system/inertial measurement unit system. When the on-board integrated global positioning system/inertial measurement unit system is excited in dynamic operation, a performance thereof is able to be tested and evaluated as if carrying a real transportation test.
Abstract:
A miniature in-vivo robotic module to be used for conducting dexterous manipulations on organs and other target entities in a patient's abdominal or peritoneal cavity as part of Natural Orifice Transluminal Endoscopic Surgery (NOTES) is disclosed in this invention. The robotic module is a serial manipulator consisting of seven cylindrical links and six actively controllable rotational degrees of freedom, thereby enabling an end effector equipped with a laparoscopic type instrument to assume a commanded position and orientation within the robot's workspace. After overtube navigation starting from a natural orifice or preexisting wound, the module must be anchored and guided to a designated location along the inner abdominal cavity wall. This is accomplished via magnetic coupling forces between internal embedded magnets and magnets fixed to the end of a different robotic manipulator located external to the patient.
Abstract:
An innovative configuration of Miniaturized Smart Self-calibration EPD for mortar applications, as the azimuth/heading and elevation measurement device. This innovative EPD configuration uses only two FOGs or DTG and accelerometers and it is self-contained. This leads to a new EPD implementation that produces a small and light device with lower cost and adequate accuracy for the small dismounted mortar applications.