KRD201/301/311 series non-standard mass and center of gravity, moment of inertia testers are suitable for model airplane, satellite momentum wheel, INS (inertial navigation system), seeker, stable targeting system, micro bullet, inertia tester application.
The model airplane flight needs good maneuverability and maneuverability. In the design, the position of the pressure center and the position of the center of mass should be required, and the maneuverability margin and stability of the model aircraft should be calculated, and the position of the center of mass in three directions should be measured. Determine and measure the moment of inertia in three directions (pitch, yaw and roll), which can be used to calculate the control force of attitude adjustment.
For asymmetric structures, the inertia product of the object can be measured by using the torsional pendulum method of measuring the moment of inertia.
Main technical specifications
- Rotational inertia range: 0.05 kg-㎡～0.5 kg-㎡;
- Measurement accuracy of rotational inertia: ±0.3%;
- Inertia product measurement accuracy of: ±1%;
- Principle axis of inertia measurement accuracy: ±20;
- Output parameters:
l6 central inertial tensors;
l9 direction cosines to determine where 3 principle axises of inertia are;
l3 principal moments of inertia.
Measuring method
Measure all six inertia tensors: Ix, Iy, Iz, Ixy, Ixz, Iyz.
For the rotational inertia tester, the fixture is horizontally installed when ly, lz, and lyz are measured, the fixture is installed at a 45° when Ixy and Ixz are measured, and the fixture is installed vertically.
There are 3 kinds of no-load situations, so it is necessary to measure the tensor under 3 kinds of no-load conditions and 6 kinds of load conditions, therefore, the measured tensors are ly under no load, lx under no load, lxy under no load, ly under load, lz under load, lyz under load, lxz under load, lxy under load, and lx under load.
Main technical specifications
- Mass measurement range: 2kg~10kg;
- Mass measurement accuracy: ± 3g;
- Center of gravity measurement accuracy
- in X direction: ±0.2mm;
- Center of gravity measurement accuracy in Y、Z directions: ±0.1mm.
Main features
- All stainless-steel parts to be used above the table top to prevent the equipment from rusting.
- The inner measurement unit processed by vibration absorption meets the requirement for transportation by vehicle.
- The box for transferring that goes with the system is used for long-distance transportation at any time.
Main technical specifications
- Mass measurement range: 2kg~10kg;
- Mass measurement accuracy: ± 3g;
- Center of gravity measurement accuracy in X direction: ±0.15mm;
- Center of gravity measurement accuracy in Y、Zdirections: ±0.05mm.
Main technical specifications
- Mass measurement range: 50g～1.5kg;
- Mass measurement accuracy: ≤±0.5g;
- Center of gravity measurement accuracy: axial ≤± 0.2mm, radial ≤± 0.05mm;
- Total weight: ＜5kg;
- Table size: length≤200mm, width≤120mm;
- Clamping outer diameter of the specimen: Φ20～Φ50mm；
- Clamping distance of the specimen: ≤200mm;
- Manual lifting device is equipped.
Tester 1 Main technical specifications
- Rotational inertia range: 10g-cm² to 1kg-cm²;
- Rotational inertia measurement accuracy: ±1%;
- Total weight:＜2kg;
- Size: base diameter Φ100mm, height 200mm;
- Clamping outer diameter of the specimen: Φ10～Φ30mm;
- Clamping distance of the specimen: ≤150mm.
Tester 2 Main technical specifications
- Rotational inertia range: 1kg·cm²～100kg·cm²;
- Rotational inertia measurement accuracy: ±1%;
- Total weight:＜5kg;
- Size: base diameter Φ200mm, height 300mm;
- Clamping outer diameter of the specimen:Φ 30～Φ70mm;
- Clamping distance of the specimen: ≤ 250mm.
Main technical specifications
It’s required to measure the position of center of gravity of micro-craft in the X, Y and Z directions and the moment of inertia around the X, Y and Z axes. The maximum size of measured micro-craft is: wingspan 5.0m, height 1.0m, length 3.0m.
- Mass measurement range: 500g~25kg
- Mass testing accuracy: ≤± 6g
- Center of gravity measurement accuracy: ≤± 1mm in the range of 5~25kg;
- ≤± 2mm in the range of 500g~5kg
- Rotational inertia measurement range: 0.1kg·㎡～10.0kg·㎡
- Rotational inertia accuracy: ≤± 1%
Main technical specifications
- Mass measurement range: 2kg~10kg
- Main test workpiece: momentum wheel axial mass and cable box X, Y, Z direction mass position.
- Mass and center of gravity measuring table size: 400mm× 400mm
- Mass measurement accuracy: <± 0.08%.
- Center of gravity measurement accuracy:<± 0.1mm.
- Rotational inertia measurement range: 100kg·cm² ~ 4000kg·cm²
- Clampable diameter range of the specimen must meets the requirments of the specimen’s clamping diameter.
- Max. clamping outside diameter of the specimen must meets the requirments for the specimen’s outline size.
- Rotational inertia measurement accuracy : ±0.3% (±0.5% when less than 500 kg·cm²)
Main technical specifications
- Measuring diameter range: φ15～φ50;
- Mass measurement range: 5~20kg;
- Rotational inertia measurement range: 100kg·cm²～3000kg·cm²;
- Rotational inertia measurement accuracy: ≤± 0.5% (With all ranges)
- Mass measurement accuracy: ± 5g;
- Center of gravity measurement accuracy: ±0.03mm for rotating body, ±0.1mm for non-rotating body.
No.3 Upgrade Demonstration Base, West of Yongchang Rd., High-tech Zone, Xianyang City, Shaanxi Province, 712023 China
