398results about How to "Improve Observability" patented technology

A closed-loop LRF pointing technology to measure the range of a target satellite from a chaser satellite for rendezvous is provided that includes several component technologies: LOS angle measurements of the target satellite on a visible sensor focal plane and the angles' relationships with the relative position of the target in inertial or LVLH frame, a relative navigation Kalman filter, attitude determination of the visible sensor with gyros, star trackers and a Kalman filter, pointing and rate commands for tracking the target, and an attitude controller. An analytical, steady-state, three-axis, six-state Kalman filter is provided for attitude determination. The system and its component technologies provide improved functionality and precision for relative navigation, attitude determination, pointing, and tracking for rendezvous. Kalman filters are designed specifically for the architecture of the closed-loop system to allow for pointing the laser rangefinder to a target even if a visible sensor, a laser rangefinder, gyros and a star tracker are misaligned and the LOS angle measurements from the visible sensor are interrupted.

A method for testing a controller-data path RTL circuit using a BIST scheme without imposing any major design restrictions on the circuit. A state table is extracted from the controller netlist of the circuit using a state machine extraction program. The untested RTL elements/modules in the circuit are then selected, and the test control and data flow (TCDF) of the circuit are extracted from the controller/data path. Once the TCDF is extracted for the selected RTL elements, a symbolic testability analysis (STA) is performed to obtain test environments for as many untested data path elements as possible. The controller input sequence at the select signals of these test multiplexers needed for the particular test environment is noted and/or stored. A BIST controller is synthesized from the stored input sequences and the circuit is integrated with the BIST components using the thereby determined BIST architecture.

A Procesor-In-Memory (PIM) includes a digital accelerator for image and graphics processing. The digital accelerator is based on an ALU having multipliers for processing combinations of bits smaller than those in the input data (e.g., 4×4 adders if the input data are 8-bit numbers). The ALU implements various arithmetic algorithms for addition, multiplication, and other operations. A secondary processing logic includes adders in series and parallel to permit vector operations as well as operations on longer scalars. A self-repairing ALU is also disclosed.

A flow manager may receive prioritized packet flow rules from one or more network services where each rule may include a packet filter and prioritized actions. Each action of a packet flow rule may be either terminating or non-terminating. A flow manager may generate a unified rule set according to the received packet flow rules and may additionally validate the unified rule set to identity errors. When validating the unified rule set, a flow manager may compare the unified rule set against one or more defined policies. Alternatively, a flow manager may apply the unified rule set to either captured or manually specified simulated network packets. A flow manager may also identity extraneous rules or actions. Further, a flow manager may present the unified rule set for manual verification and may receive input identifying errors and specifying modification to correct the errors.

A test pattern sequence is generated (101), then a logic simulation of the operation of an IC under test in the case of applying each test pattern of the test pattern sequence, and a logic signal value sequence occurring in each signal line of the IC under test (102). The logic signal value sequence in each signal line is used to register in a fault list parts (a logic gate, signal line or signal propagation path) in which a fault (a delay fault or an open fault) detectable by a transient power supply current testing using the test pattern sequence is likely to occur (103).

A method and system to rapidly, passively, estimate target range, speed and heading for non-maneuvering and maneuvering radio frequency airborne emitters (enemy targets and threats) for tactical fighters using batch based recursive estimators for track initialization and track maintenance that includes providing information processing that operates on interferometer cosine (cone angle) measurements, and estimated SNR (signal-to-noise ratio) data, threat database, and feedback information from pilot maneuver cue algorithm. The present method will initialize airborne tracks using varying degrees of real time and a priori information to quickly estimate coarse airborne emitter heading using real time interferometer cosine (cone angle) measurements and provide pilot aircraft maneuver cues that will accelerate passive range (target speed and heading estimates) convergence. The system includes pilot maneuver cue processing which computes airborne emitter (target and threat) initial heading and corresponding accuracy to determine if sufficient accuracy is available to present the pilot with the proper pilot cue.

A system determines three-dimensional attitude of a stationary or moving platform using signals from a Global Navigation Satellite System (GNSS) antenna that undergoes deliberate translation, which may be occasional. The system uses single GNSS receiver, a single GNSS antenna, and inertial acceleration and/or rotation rate sensors. In one implementation, the GNSS antenna and inertial sensing components are rigidly connected and mounted to a pallet that is intentionally translated along a track as needed. In a second implementation, the GNSS antenna is mounted to a pallet, and the inertial sensing components are fixed in position. To maximize effectiveness, the track is oriented along a geometrical direction of the platform that is predominantly in a lateral direction from the gravity vector. The system achieves three-dimensional attitude accuracy that rivals interferometric GNSS systems.

The invention belongs to the technical field of inertial navigation and also provides a strapdown inertial navigation initial alignment method for an antenna tracking and stabilizing platform, which aims to further improve the precision and the speed of initial alignment of a strapdown inertial navigation system. A kalman filter state equation with a speed error as a state variable and an observation equation with a speed error as an observation value are established, and a carrier misalignment angle is estimated by a kalman filter technology and is fed back into the system for implementing initial alignment of the system. The strapdown inertial navigation initial alignment method has the main advantages that under a condition that a conventional hardware structure of the system is not changed, the initial alignment of a rotating base is implemented by fully utilizing the structural characteristic of the antenna tracking and stabilizing platform, so that the observability of the strapdown inertial navigation system is improved, and furthermore, the precision of the initial alignment of the strapdown inertial navigation system is effectively improved.

The invention discloses an active distribution network multi-stage planning method. How to comprehensively consider the uncertainty of source-load network storage in distribution network planning is aproblem that needs to be studied in-depth. The invention comprises the following steps: inputting power system parameters, historical operation data, regional development planning demand and predicted uncertain factor data; Calculating the shadow price of each planning decision quantity in each running scenario with multi-time scales; According to the shadow price and the occurrence probability of each scene, establishing the running constrained scene library including extreme scenes and classical scenes. According to the constrained scenario library, modifying the upper-level multi-stage planning optimization model. The invention screens out the planning scene database with pertinence and typicality to revise the optimization model of planning investment, which is used to simulate the feedback of the operation decision-maker to the planning decision-maker, thereby improving the observability of the massive operation scene result of the distribution network, hierarchically solving thedecision variables of different time scales, and reducing the solution difficulty.

The invention provides a nutrient noodle and a preparation method thereof. The invention is characterized in that coarse food noodle and fine food noodle are internally packed with a meat product to form into the meat-noodle integrated nutrient noodle, wherein the coarse food noodle and the fine food noodle comprise the following components in percentage by weight: 40-50% of wheat flour, 20-30% of corn flour, 10-15% of pumpkin flour, 5-15% of bean flour, 5-15% of potato flour, 5-8% of buckwheat flour, and 5-10% of peanut flour; and the meat product comprises the following components in percentage by weight: 60-70% of meat, 5-10% of starch, 5-10% of rice flour, 10-15% of wheat flour and 8-12% of onion. The nutrient noodle not only has the special nutrition constituents, such as the dietaryfiber, the carbohydrate, the mineral matter, the vitamin and the like, of the coarse food and the fine food, but also has the nutrients, such as the protein, the fat and the like, of the meat, thereby being a delicious food which ensures meat-vegetable and coarse-fine collocation. People can get at least three foods such as the coarse food, the fine food and the meat, so that the meat-vegetable and coarse-fine collocation requirements can be met, the nutrition constituents gotten by the people can be comprehensive and diversified, and the unique flavor and mouthfeel of the nutrient noodle canbe enjoyed simultaneously; and the nutrient noodle is free of any chemical additive, environmental-friendly and natural, so that the appetite of the people can be improved.

The invention relates to a method for designing a Mars entry phase autonomous navigation scheme based on observability degree analysis, belongs to the technical field of deep space exploration, and particularly aims to optimize the geometric configuration of a navigation beacon so as to realize the design of the Mars entry phase autonomous navigation scheme and ensure the optimal navigation property by utilizing observability degree of a navigation system to represent the property of the navigation system and by combining the Mars entry phase autonomous navigation scheme based on radio measurement. According to the method provided by the invention, the observability matrix is calculated through a linearization method, the calculation amount is small, and the calculation speed is high; the observability degree of the navigation system is defined by inverse of the condition number of the observability matrix, and a quantitative gauge is provided for observability of the navigation system; and the observability degree of the navigation system can be maximized, so that the property of the navigation system can be further improved.

The invention relates to a testing method for a field programmable gate array (FPGA). The method comprises the following steps: obtaining an initial design netlist and an initial design configuration of the FPGA; replacing a look-up table function of the initial design netlist and the initial design configuration with an exclusive or function of a logic function to obtain an initial testing netlist and an initial testing configuration; selecting an observation node of the initial testing netlist based on a preset rule of a testability analysis method, and obtaining a testing netlist and a corresponding testing vector; configuring an output terminal of an output and input unit from the observation node to the initial testing configuration to obtain a testing configuration; connecting the testing configuration to an configuration device according to an excitation signal of the configuration device to obtain an output logic value of the testing vector; and analyzing the output logic value and a response value of the testing vector to obtain the testing result. The method can effectively detect permanent faults of interconnection lines used in the application design of FPGA chips.

The invention discloses an aerial motor alignment method of SINS/GPS combination navigation system, which is characterized by the following: supplementing the lever effect error of GPS observed quantity, which improves the precision of observed quantity; adapting the motor strategy of course variation; utilizing the singular value decomposition method to analyze each system observed degree variation of status variable; adapting the adaptive feedback strategy; adjusting feedback factor of system status variable according to the variation of observed degree; correcting the feedback factor. The invention is fit for the navigation precision improvement such as plane, missile and ship or vehicle combination navigation system.

The invention belongs to the technical field of inertial/satellite integrated navigation, in particular to a pseudo-range/pseudo-range rate tight integration method for an inertial/satellite navigation system. The method includes: applying differences between the pseudo-range and pseudo-range rate measured by a global positioning system and the range information and rate information, related to a satellite and solved by inertial navigation, as observation; and estimating inertial errors and clock parameter of the global positioning system by Kalman filtering, and calibrating combinational output by output calibration. The method includes the steps of establishing a model; estimating system errors; adaptively adjusting parameters; and calibrating output. The technical problem that the inertial/satellite integrated navigation system with position/speed loose integration fails in normal positioning in complex environments is solved. The use of the pseudo-range/pseudo-range rate tight integration allows normal positioning for the inertial/satellite integrated navigation system in the complex environments.

Observability of damage precursor, damage and usage states, or event occurrence may be enhanced by modifying component materials to include self-monitoring materials or by processing test material to alter the surface properties. The properties of the self monitoring materials, such as magnetic permeability or electrical conductivity, are monitored with electromagnetic sensors and provide greater property variations with component condition than the original component material. Processing includes shot peening or laser welding.

The invention provides a rotating strapdown system on-site proving method based on digital high-passing filtering, which comprises the steps: (1) determining an initial position parameter of a carrier by a GPS; (2) collecting data output by an optical fiber gyroscope and an acceleration meter, and processing the data; (3) rotating and stopping at four positions of a single axis of an inertia measurement unit; (4) analyzing biased observability degree of an inertia device by using a spectral condition number method; (5) filtering the Schuler period contained in velocity information of a navigation system by adopting an IIR high-passing digital filter; and (6) taking filtered velocity information as observed quantity, and estimating the deviation of the inertia device by adopting a Kalman filtering technique. When the carrier is in anchoring state, the adoption of the method can obtain higher on-site proving precision.

The invention discloses an illumination adaption method and device, a storage medium, a processor, and a terminal. The method comprises the steps: carrying out the illumination analysis of the video image data obtained by image collection equipment, and obtaining the adjustment information; carrying out the three-dimensional rendering of an object in a virtual world according to the adjustment information, and obtaining a rendering result; and carrying out the overlapping displaying of the rendering result and the video image data. The method solves a technical problem that a provided AR application in the related technologies is poorer in visual experience for a virtual world rendering mode.

The invention discloses a method and a device for preparing a colloid probe, and relates to the probe technology. The colloid probe is prepared by adopting a three-dimensional translation stage to bi-directionally move and adjust the relative positions of a micro cantilever probe and colloid grains or optical adhesive droplets, carrying the micro cantilever probe through a rotary stage and a crossrod rack, adjusting the inclination angle of the micro cantilever probe and sticking the colloid grains to the back of the tip of a probe micro cantilever by using optical adhesive. The method and the device is suitable for preparing the colloid grain probe which uses an atomic force microscope to detect an interaction process of the grains and the surface (grains) so as to acquire a grain-surface (grain) acting force curve. The method and the device are characterized by simple and quick probe preparation operation, and strong practicability, and are suitable for batch manufacturing in a laboratory.

The invention mainly relates to a photovoltaic power optimization system, which comprises a plurality of photovoltaic assemblies which are connected in series, wherein each photovoltaic assembly is provided with a carrier transmission module which is used for forming a communication carrier on a transmission line of connecting the photovoltaic assemblies in series; each photovoltaic assembly is provided with a carrier sensing module which is used for extracting a communication carrier on the transmission line; and at least one part of photovoltaic assemblies are provided with a wireless communication module, so that at least one part of photovoltaic assemblies receive or transmit first data which are reflected in a wireless communication form through the arranged wireless communication module, and/or the photovoltaic assemblies receive second data which are reflected in a communication carrier form on the transmission line through the arranged carrier sensing module.

Built-in self-test techniques for integrated circuits that address the issue of unknown states. Some implementations use a specialized scan chain selector coupled to a time compactor. The presence of the specialized scan chain selector increases the efficiency in masking X states. Also disclosed are: (1) an architecture of a selector that works with multiple scan chains and time compactors, (2) a method for determining and encoding per cycle scan chain selection masks used subsequently to suppress X states, and (3) a method to handle an over-masking phenomenon.

The invention provides medium formulas for edible fungus liquid seed submerged fermentation packaged seed production. The medium formulas comprise a shake flask seed medium formula and a fermentor seed medium formula. According to the shake flask seed medium formula, potato starch is mainly added to take the place of potato slices in a traditional shake flask seed medium formula. According to the fermentor seed medium formula, potato starch is mainly added to take the place of maize meal, soya bean meal, bran and other matter in a traditional fermentor seed medium formula. The invention further provides an edible fungus liquid seed submerged fermentation packaged seed production technology. According to the technical scheme, the potato starch is mainly introduced, the shake flask seed medium formula and the fermentor seed medium formula are similar, observation is convenient to achieve during seed production, strain quality is balanced, raw materials are easy to process, and the utilization rate is high.