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490results about How to "Solve bulky" patented technology

Folding lightweight landing mechanism

The invention discloses a folding lightweight landing mechanism and relates to the landing mechanism of a lander. The invention aims at solving the problems of large volume, complexity in a buffer structure and high cost of the existing landing mechanism of the lander during the launching process. The folding lightweight landing mechanism comprises a triangular space truss type support, a buffer component, an instrument platform and three landing legs, wherein the triangular space truss type support comprises a triangular support, a star-shaped support, a space truss connecting rod component, three groups of main landing leg connecting components and three groups of auxiliary landing leg connecting components, the triangular support and the star-shaped support are arranged at the upper part and the lower part, the triangular support is connected with the star-shaped support through the connecting rod component, the three landing legs are distributed and connected on the periphery of the triangular space truss type support through the main landing leg connecting components and the auxiliary landing leg connecting components, and the triangular space truss type support is connected with the instrument platform through the buffer component. The folding lightweight landing mechanism is applicable to lander exploration activities for asteroids, comets, the moon, the Mars and the like.
Owner:HARBIN INST OF TECH

Capacitive buffer type mixed high-voltage direct current circuit breaker and control method thereof

The invention discloses a capacitive buffer type mixed high-voltage direct current circuit breaker and a control method thereof. The circuit breaker comprises a mechanical switch unit, a current conversion unit, a capacitive buffer unit and a mechanical switch energy supply unit, wherein the mechanical switch unit is formed by connecting at least one mechanical switch sub-unit in series; the mechanical switch sub-unit is formed by connecting a mechanical switch, a voltage sharing module and an energy-absorbing voltage-limiting module in parallel; the current conversion unit is formed by connecting a power electronic switch module and a voltage-limiting module in parallel; the power electronic switch module comprises at least one power electronic device; the capacitive buffer unit consists of capacitor banks and provides a current conversion buffer branch for fault current; the mechanical switch energy supply unit supplies electric energy to the mechanical switch, and the quickness and the coordination of the motion are ensured. The capacitive buffer type mixed high-voltage direct current circuit breaker and the control method thereof, provided by the invention, have the advantages that the capacitive buffer type mixed high-voltage direct current circuit breaker is simple in structure, convenient to control, high in speed, high in reliability, high in galvanization voltage resistance level, small in size and low in cost.
Owner:HUAZHONG UNIV OF SCI & TECH

Active vibration isolation control platform

The invention discloses an active vibration isolation control platform. The active vibration isolation control platform comprises an active vibration isolation device and an active vibration isolation controller; the active vibration isolation device comprises a lower platform, a midbody and an upper platform; a voice coil motor actuator is arranged between the midbody and the lower platform; a linear variable differential transformer type displacement sensor is arranged between the upper platform and the midbody; and two three-freedom-degree acceleration sensors are arranged on the upper platform and the lower platform respectively. The vibration isolation controller is designed according to a master-slave open type control structure and consists of an upper control computer and a lower execution controller, wherein the upper control computer is a mainframe of an embedded type industrial control computer PC/104; and the lower execution controller is an open-type controller. The active vibration isolation control platform is quite effective on low-frequency vibration isolation and is applicable to precise manufacture, precise measurement, aerospace application and other vibration isolation fields with special requirement on vibration environment.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI

Reversed-field permanent-magnet focusing system for multi-beam millimeter wave traveling-wave tubes and manufacturing method thereof

InactiveCN101944469ADoes not affect circulationSolve the problem of large permanent magnet volume when the gain is largeTransit-time tubesNon-emitting electrodes manufactureUniform fieldTransverse magnetic field
The invention discloses a reversed-field permanent-magnet focusing system for multi-beam millimeter wave traveling-wave tubes, which consists of an electron gun end face (1), first magnetic field rectifiers (2), a first peak generation pole shoe (3), a magnetic field reversal pole shoe (4), a second peak generation pole shoe (5), second magnetic field rectifiers (6), a vacuum sealed case (7), a collector end face (8), first permanent magnets (9) and second permanent magnets (10). The reversed-field permanent-magnet focusing system for the multi-beam millimeter wave traveling-wave tubes rectifies magnetic fields on the left and right sides of a magnetic system by the first and second magnetic field rectifiers (2 and 6) so as to reduce a transverse magnetic field without influencing flux rates of electron beams, and simultaneously solves the problem of large volumes of the permanent magnets of a uniform-field permanent-magnet focusing system with large gain due to the applicability of the plurality of first and second permanent magnets (9 and 10) with small volumes to the focusing system.
Owner:HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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