摘要:
The invention relates to a monitoring device and method allowing surveillance of the location and the displacement of an aircraft in relation to aircraft and/or craft on an airport displacement zone.The invention is a system cooperative with a communication network of ADS-B type and TIS-B comprising a dedicated transmitter and receiver, these transmitters and receivers making it possible to receive the information regarding the location and displacement of the cooperative aircraft and to monitor the location of the said aircraft in relation to the cooperative aircraft. The monitoring application is based on the detection of conflict zones by inter-correlation of constraint surfaces of the airport zone.The invention applies to aircraft on board which are carried communication means for ADS-B networks for an airport zone monitoring application.
摘要:
The invention relates to aiding airport navigation by emission of an alert reminding the pilot of a craft moving on the surface of an airport of the circulation constraints encountered locally over his route. The method comprises the following steps: partitioning of the circulation surfaces of the airport into elementary circulation constraint zones each enclosing a set of adjoining points subject to the same local circulation constraints, identifications of the elementary zones and of their specific circulation constraints, detection of the encroachment of the craft into the elementary zones, and upon each encroachment of the craft into an elementary zone, reminder by alert generation, to the commander of the craft, of one at least of the circulation constraints specific to the elementary zone concerned.
摘要:
This device furnishes a map for assisting navigation at low-level altitude while representing the zone flown over with points shown in false colors and/or textures or symbols corresponding to the vertical speeds needed to fly over them.
摘要:
The device attracts the attention of an aircraft crew on approach or normal (alert) or abnormal (alarm) crossing, of a traffic zone of an airport infrastructure presenting risks of collision. Accordingly, it selects on the basis of the information provided by the flight instruments, a type of flight phase from among a limited and pre-established choice of predefined types of flight phase. Then considers one or more runway incursion scenarios that are predefined as a function of the selected type of flight phase whose likelihood it analyzes by comparing the position of the aircraft provided by an onboard locating device with a plan of the airport infrastructure derived from an airport database and determines, on the basis of the analyzed scenarios that appear to be likely, alerts and alarms to be emitted in the cockpit.
摘要:
The parts of the flight plan of an aircraft corresponding to lateral trajectories at low altitude can comprise passages with limited lateral freedom of deployment because of risks of collision with the ground, or because of obstacles on the ground. The method makes it possible to signal them for the attention of the crew, so that said crew should redouble their attention. To do this it uses the display, on an onboard navigation screen, of a vertical profile of margin of maneuver relating to the navigation band widened to the right and to the left by lateral margins of maneuver, superimposed on the vertical navigation profile relating only to the navigation band.
摘要:
This method uses for the estimation of a distance, a propagation distance transform considering only the paths which are both accessible to the aircraft taking account of its vertical flight profile and complying with air regulations. The propagated distance Dp is accompanied by a propagated altitude Ap which at all points follows the vertical flight profile of the aircraft, whilst being greater than the altitudes of these points and complying with the air regulation constraints at these points. This is obtained by subjecting the propagation to compliance with the vertical flight profile of the aircraft, constraints of the elevations of the points of the relief and air regulation constraints.
摘要:
The locating of difficult access points, on a topological map of the zone overflown by an aircraft, plotted on the basis of a map of curvilinear distances taking account of the vertical flight profile of the aircraft, is effected by analyzing the map of curvilinear distances, by means of a chamfer mask cataloging the approximate values C(V) of the Euclidean distances separating a point C00 of the map from its nearest neighbors V, so as to extract therefrom, at each point C00 of the map of curvilinear distances, the discrepancies 1DT(V)−DT(0)1 of curvilinear distances separating the point considered C00 from its nearest neighbors V, compare these discrepancies 1DT(V)−DT(0)1 with the approximate values C(V) of the Euclidean distances of the chamfer mask and describe the point considered as difficult of access when a difference is noted between Euclidean distance and discrepancy of curvilinear distances. This locating proves to be useful for signaling the reliefs that are not accessible by a shortest path but are accessible after detour.
摘要:
A voltage regulating device includes a comparison circuit for comparing a voltage proportional to an output voltage to a fixed reference voltage. The fixed reference voltage is received on a first input and the voltage proportional to an output voltage is received on a second input. The voltage regulating device further includes a variable resistance-forming circuit controlled by the output of the comparison circuit and disposed so that the output voltage remains substantially constant. The voltage regulating device may be supplied with a variable input voltage. The voltage regulating device further includes a second comparison circuit so that the output voltage remains substantially constant if the input voltage is greater than a threshold, and substantially equal to the input voltage if the input voltage is less than the threshold.
摘要:
A voltage regulator includes a regulation MOS transistor and an amplifier providing an output for driving a gate of the regulation MOS transistor. The amplifier drives the gate based upon a difference between a reference voltage and a feedback voltage. The voltage regulator may further include a circuit for making the amplifier switch to a standby mode with low current consumption when the difference between the supply voltage and the output voltage of the regulator is below a first threshold. This is done while maintaining, at the gate of the regulation transistor, a voltage that keeps the regulation transistor on. The present invention is particularly applicable to the management of power supplies in portable telephones.
摘要:
A voltage regulator includes a regulation MOS transistor with low serial resistance having a first terminal connected to a voltage source and a second terminal connected to the output of the voltage regulator and an amplifier having an output driving a gate of the transistor. The gate is driven based upon a difference between a reference voltage and a feedback voltage. The regulator may also include an anti-overshoot switch with a first terminal connected to the gate of the regulation MOS transistor and a second terminal is taken to a potential for turning the regulation MOS transistor off. A switch controller closes the switch when the output voltage of the regulator is higher than a first threshold. The first threshold may be higher than the nominal value of the output voltage.