نتایج جستجو برای: flight alignment
تعداد نتایج: 122516 فیلتر نتایج به سال:
dna methylation is an important biological process involving in human disease such as cancer insomia and diabetes. bisulfite sequencing (bs-seq) with next-generation technology is an accurate method for measuring dna methylation. bs-seq data analysis is a considerable way to recognize methylated cytosines and several tools have been developed to analysis bs-seq such as bs-seeker, b-solana, brat...
The main purpose of this work is the comparison of several objective functions for optimization of the vertical alignment. To this end, after formulation of optimum vertical alignment problem based on different constraints, the objective function was considered as four forms including: 1) the sum of the absolute value of variance between the vertical alignment and the existing ground; 2) the su...
background: according to clinical observations, foot hyperpronation is very prevalent and may cause malalignment of the lower extremity, leading to structural and functional deficits in standing and walking. this study aimed at investigating the effect of foot hyperpronation on spine alignment in the standing position. methods: thirty-five healthy males with an age range of 18-30 years partic...
Digital terrain model (DTM) generation is essential to recreating morphology once the external elements are removed. Traditional survey methods still used collect accurate geographic data on land surface. Given emergence of unmanned aerial vehicles (UAVs) equipped with low-cost digital cameras and better photogrammetric for mapping, efficient approaches necessary allow rapid surveys high accura...
In this research, Generalized Predictivecontrol (GPC) is proposed for the control of a stabilizing loop from a two axis gimbal seeker. In fact, there are some views about using GPC type controller which are two folds. First, it drives the stabilization loops that are made by a DC motor, Rate Gyro, inertia and cross coupling unit in between two channels using the predictive model type controller...
A near-optimal midcourse trajectory shaping guidance algorithm is proposed for both air and ballistic target engagement mission attributes for generic long range interceptor missile. This guidance methodology is based on the maximum final velocity as the objective function and maximum permissible flight altitude as the in-flight state constraint as well as the head-on orientation as the termina...
Flies have a distinct body posture during walking and flight. Hence head and eyes have mostly a preferred alignment with the surroundings. Voluntary and involuntary changes of body orientation elicit compensatory head turns which stabilize the original, correct orientation of the eyes relative to the surroundings. Compensatory head turns are elicited by several sensory cues which simultaneously...
Navigation in autonomous vehicles involves integrating measurements from on–board inertial sensors and external data collected by various sensors. In this paper, the computer–frame velocity error model is augmented with a random constant model of accelerometer bias and rategyro drift for use in a Kalman filter–based fusion of a lowcost rotating inertial navigation system (INS) with external pos...
We report results of a laser link experiment between a laser altimeter called light detection and ranging (LIDAR) aboard Hayabusa2 and ground-based satellite laser ranging stations conducted when the spacecraft was near the Earth before and after the gravity assist operation. Uplink laser pulses from a ground station were successfully detected at a distance of 6.6 million km, and the field of v...
Abstract: In this paper, a robust filter for an in-flight alignment (IFA) is presented to effectively eliminate system errors in the case where a strapdown inertial navigation system (SDINS) has large initial attitude errors. First, an extended robust ∞ H filter is proposed for a general nonlinear uncertain system. We also analyze the characteristics of the proposed filter, such as an ∞ H perfo...
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