This paper addresses the prognosis problem for hybrid systems with intermittent faults and uncertain parameters. First, a diagnostic bond graph in linear fractional form is used to model system generate mode-dependent adaptive thresholds fault detection purpose. Then, global combinative signature matrix integrating independent dependent augmented analytical redundancy relations proposed improve isolability under multiple-fault condition. After possible set isolated, an reinforcement...

This paper addresses diagnosis and prognosis problems for an electric scooter subjected to parameter uncertainties compound faults (i.e., permanent fault intermittent with non-monotonic degradation). First, the diagnostic bond graph in linear fractional transformation form is used model uncertain derive analytical redundancy relations incorporating nominal part part, based on which adaptive thresholds robust detection signature matrix isolation can be obtained. Second, enhanced unscented...

Abstract. Extreme low and high temperature is the main obstacle to grow plants in an ambient environment. Due climate change, these problems are getting worse day by day. To resolve this dilemma a new type of energy-saving greenhouse structure, multi-span solar energy (SEG), was designed constructed Yangtze valley region China. Using plastic as control (CG), microclimate characteristics SEG were studied winter summer. The results showed that, because adopted cooling way combination external...

In this article, a fast krill herd algorithm is developed for prognosis of hybrid mechatronic system using the improved Wiener degradation process. First, diagnostic bond graph used to model and derive global analytical redundancy relations. Based on relations, fault signature matrix mode change isolation can be obtained. Second, in order determine true faults from suspected candidates after isolation, estimation method based adaptive square root cubature Kalman filter proposed when noise...

In the field of mechanical automation, intelligent industrial robot technology is an important branch in research robot; it always hot spots world research, and being used to get application industry today. Robot experiment platform PLC motor control technology, based on method by system improvements make more perfect run precise, reasonable. same time, man-machine interface state monitoring, ensure normal operation system. Improved improvement work efficiency, reduce workers a duplication...

The requirements of 5G/6G promote progress in the miniaturization antenna array, which promotes development a closely spaced decoupling technique. However, present techniques face common problem beam tilt if spacing is close. Thus, pattern-corrected, closely-spaced technique proposed this paper for two patch antennas with λ0/20 edge-to-edge distance H-plane. corresponding structure, inserted at center spacing, consists vertical wall single substrate and symmetrical T-type metals, slot...

This paper presents the study of a 100kW electric vehicle (EV) fast charger based on 12-pulse rectifier cascaded with two buck-type DC-DC converters.The proposed circuit operates triangular current shaping method which considerably improves harmonics performance system.The studied is particularly suited for high power battery charging, being relatively simple to operate, requiring low active semiconductor count (only switches), and because it employs technologies well-established in...

Abstract Monitoring of steer-by-wire (SBW) system under intermittent faults is challenging since it difficult to obtain the priori knowledge monotonous degradation feature fault due its stochastic nature. To deal with this issue, paper develops a prognosis method for SBW unknown features based on concept competitive process (CDP). With aid diagnosis module, possible faulty components can be determined, where isolation estimators and expanded analytical redundancy relations are used improve...

Vibration energy harvesting has received much attention as a new type of power solution for low-power micro/nano-devices. However, VEH (vibration harvester) based on PVDF (polyvinylidene fluoride) piezoelectric materials have low output and conversation efficiency due to the relatively constant, coupling coefficient, dielectric constant. For this reason, we design vibration conversion supply, which consists with thin film planar array structure an circuit regulating electric multiple...

This paper presents a model-based distributed fault diagnosis approach for electro-hydraulic suspension system by using the diagnostic hybrid bond graph (DHBG) technique and bat algorithm (BA). Electro-hydraulic is complex nonlinear if centralized used, some problems, like poor scalability high computationally cost, exist. To overcome these developed where DHBG model of global decomposed into several local submodels temporal causal technology. In each submodel, analytical redundancy...

Automated control can improve the canal system to scheduler run levels, water efficiency and reduce operating costs schedule. In order accuracy reliability of control, paper combines fuzzy theory PID technology, Can give full play intelligence technology characteristics effectively limitations traditional realize real-time self-tuning parameters, This ensures stable operation drainage systems, greatly overall performance canal, automatic development provides new ideas approaches. Finally...

A resonant compact meander line slot is etched on the ground plane of two E-plane closely-spaced patch antennas, which a challenging task with spacing λ0/20 between radiating edges. fivefold used as decoupling structure edges so that dimension does not exceed width for purpose. Such simple improves matching and isolation to be better than 19 dB in 5.8 GHz band.

This paper presents a distributed fault diagnosis approach for electro-hydraulic suspension system based on model decomposition technique. As complex nonlinear system, the involves various components and traditionally centralized method will suffer from some problems such as poor scalability, high computation cost so on. To solve above problems, is adopted in this paper. Firstly, diagnostic hybrid bond graph of decomposed into several submodels by Then, analytical redundancy relations are...