This research describes a Hardware in the Loop Simulator (HILS) that was developed to enhance the quality of attitude data received from autopilots. The described system aided in adjusting the contribution of individual IMU sensors and thereby improved the accuracy of IMU data. The HILS system outlined in this research is a gimbaled platform equipped with four stepper motors and two optical sha...

This paper presents two new types of markers of MCubITS (M-sequence Multimodal Markers for ITS; M-Cubed for ITS) that is a ground-based positioning system, in order to advance the WYSIWYAS (What You See Is What You Are Suggested) navigation environments providing intuitive guidance. One of the new markers uses warning blocks of textured paving blocks that are often at important points as for pe...

Total knee arthroplasty (TKA) for osteoarthritis (OA) patients with extra-articular deformity is still challenging because angular deformity, canal sclerosis, or the retained hardware that precludes the use of the traditional intramedullary guide. In addition, atypical bone cut for intra-articular correction leads to imbalanced soft tissue gap. Furthermore, corrective osteotomy should be consid...

Abstract Methods are developed to acquire and track orthogonal frequency division multiplexing (OFDM) digital FM radio signals. These methods being with the goal of using signals’ pseudorange accumulated delta-range observables navigate. Delay lock loop phase discriminator outputs computed by solving an optimal fitting problem in domain for each OFDM symbol. Single-differencing between...

Introduction One of important factors to achieve stable postoperative results is to obtain proper soft tissue balance at the time of total knee arthroplasty (TKA). With a goal of accurate gap balance during TKA, we developed a tensor called Joint Dependent Kinematics (JDKmini II, Stryker, Tokyo, Japan) and presented the tensor in this meeting last year. Computer navigation has been proven to be...

The drive towards utilizing small, cheap, autonomous aerial vehicles for military operations means that navigation systems that are robust to GPS denial must be employed. The simplest option available is to increase the accuracy of the inertial measurement unit (IMU), but this can substantially increase the price per operational unit. This paper presents an overview of the All-Source Navigation...

This paper presents an alternative approach for improving the stationary fine self-alignment of strapdown inertial navigation systems (SINS). This approach is based on an expansion on the measurement vector of the linearised augmented state Kalman filter, which allows us to estimate the observable uncompensated inertial sensor biases more quickly and more accurately, contributing, thus, to incr...

This paper addresses a practical problem arising in the calibration of bottom-lock doppler sonar for the navigation of underwater robot vehicles. Employing a least-squares method, the rotational alignment offset between a bottom-lock doppler sonar and a north-seeking gyroscope can be experimentally determinined using sensors commonly deployed with a vehicle in the field. It requires sensor valu...