The grid strapdown inertial navigation system (SINS) used in polar navigation also includes three kinds of periodic oscillation errors as common SINS are based on a geographic coordinate system. Aiming ships which have the external information to conduct a system reset regularly, suppressing the Schuler periodic oscillation is an effective way to enhance navigation accuracy. The Kalman filter b...

Let be a random sample from a normal distribution with unknown mean and known variance The usual estimator of the mean, i.e., sample mean is the maximum likelihood estimator which under squared error loss function is minimax and admissible estimator. In many practical situations, is known in advance to lie in an interval, say for some In this case, the maximum likelihood estimator...

of ours, there immediately springs up a mushroom crop of theorists, who would account, each after his own fashion, for the phenomenon. First come the supernaturalists, who assign the event to the wrath of some offended God or Gods, on account of sins, real or imagined. The " sins of outrulers" is the most favorite formula in India. Next come the transcendentalist s, who attribute the circumstan...

To realize high-precision Single-axial Rotating FOG-SINS, a low-power, low-cost, middle-precision rotating control mechanism design for single axial navigation system is put forward. Through theory analysis, and experimental verification, the has good precision high reliability, which meets demands developing middle & FOG-SINS.