Analytic alignment is a type of self-alignment for Strapdown inertial navigation system (SINS) that based solely on two non-collinear vectors, which are the gravity and rotational velocity vectors Earth at stationary base ground. The attitude SINS with respect to can be obtained directly using TRIAD algorithm given vector measurements. For traditional analytic coarse alignment, all six outputs from measurement unit (IMU) used compute attitude. In this study, novel method called selective...

Using passive electromagnetic interference (EMI) filter to suppress the common mode (CM) noises on dc and ac side of motor drive systems is a filtering method. Shrinking volume CM inductors key miniaturization EMI filters. In order reduce volume, this article proposes new method integrate by magnetic coupling. The principle design constraints coupled are analyzed. reduction advantage gained using proposed illustrated. A model built describe relationship between coupling coefficient...

The prediction technology of remaining useful life has received a lot attention to ensure the reliability and stability complex mechanical equipment. Due large-scale, non-linear, high-dimensional characteristics monitoring data, machine learning does not need an exact physical model prior expert knowledge. It robust data processing ability, which shows broad prospect in field electrical Therefore, algorithm based on Random Forest Bi-directional Long Short-Term Memory (RF-BiLSTM) is proposed....

As the development of multidisciplinary techniques and ever-growing demands, autonomous system has been widely investigated in a variety fields. In recent two decades, surface vessels have gained increasing attention from both industry research communities, previous related work mainly focuses on design maneuver controllers, most algorithms are under some specific assumptions always involve too many parameters that need to be tuned, leading lack practical application or validation real...

In order to reduce the common-mode voltage (CMV) for three-to-five-phase indirect matrix converter (IMC), CMV with conventional modulation strategy is analyzed. A novel carrier-based PWM (CBPWM) method proposed in this paper. The zero vectors inverter stage are assigned rectifier stage, equivalently, which not considered stage. selected appropriately ensure that dc-link connected an input phase minimum absolute value, so larger can be avoided. Then, signals derived by duty ratios, used...

This system was developed to monitor on-line insulation resistance of electric vehicle via voltage measurement. The influence detection error and battery fluctuation on the result precision analyzed in detail, measures were put forward get better accuracy. System designed into practical use. And some experimental data acquired presented validate its applicability for vehicles.

An improved optimization algorithm, namely, multi-strategy-sparrow search algorithm (MSSSA), is proposed to solve highly non-linear problems. In MSSSA, a circle map utilized improve the quality of population. Moreover, adaptive survival escape strategy (ASES) enhance ability sparrows. producer stage, craziness factor integrated with ASES introduced accuracy and ability. scout facilitates sparrows successful from danger. Besides, opposition-based learning or Gaussian–Chachy variation helps...

Considering the disadvantages of low efficiency and huge demand for manpower, automated batch calibrating system MIMU(MEMS Inertial Measurement Units) is designed. The mainly consists muti-channel data acquisition, storage processing module automatic control module. MIMUs' datas are transmitted through Ethernet interface instructions via serial port. can calibrate at most 16 MIMUs same time calculate calibration parameters automatically. also has function power fault alarm, etc. A test this...

This paper proposes an ultra-low voltage delay element for battery-assistance DC energy harvesting systems. By inserting a low level shifter (VLS), wider range is obtained to bias the body of element. Thus, both transfer curve (VTC) and gain are enhanced. Due introduction VLS, cold start-up ring oscillator constituted by proposed can achieve oscillation under extremely input voltage. The fully integrated with 21 stages implemented in standard 180 nm complementary metal oxide semiconductor...

The performance of a three-phase electromagnetic interference filter will be degraded due to noise-mode conversions. This article reveals these conversions are mainly induced by the unbalanced parameters filter's components. Moreover, pulsewidth modulation strategies worsen this problem further. In order evaluate conversion contaminations, capacitors cases addressed in detail, and criterion on capacitor tolerance is then proposed. Furthermore, impact differential-mode components also...

The projectile-borne data recorder is used to measure and record the position attitude of exterior ballistic flights, which experience high overload during launching process. navigation algorithm can be optimized by analyzing stored in recorder. As primary means acquiring data, micro inertial measurement unit (MIMU) an inevitable part projectile equipment. However, its mechanical structure could hardly bear operation. In view above problems, a novel triggered designed this paper. have system...

This paper presents a voltage level shifter (VLS) based on two feedback loops. The complementary signals in the high domain are re-used to assist conversion and phase low is not required. Unlike conventional VLS, which depends pull-up network pull-down achieve shift, transitions of both high-to-low low-to-high proposed VLS undertaken by different loops, respectively. Implemented standard 180 nm CMOS process, post-layout Monte Carlo (MC) simulations from 4000 points under mismatch variation...

Compared with traditional AM gyroscope, FM operation brings about wider dynamic range and more stable scale factor bias. A third-order noise shaping frequency-to-digital converter is proposed in this paper to improve gyroscope's ultimate precision. It achieves 8μHz or 10dph resolution 10Hz bandwidth only 200kHz reference clock frequency. The full 2000dps, corresponding a of 117dB 1.26μW power consumption. This ultra-low-noise low-power enables the development high performance gyroscope.

This paper presents a comprehensive technique review for CCDD rectifier. It includes the challenges design of RF-to-DC rectifier and techniques efficiency improvement by controlling gates bodies MOS in The comparison different is concluded. idea novel discussed simple simulation result shown this paper.