1. The mathematics model of the error is built. The best position and value of the equilibrant are calculated through optimizing.
建立了修正前和修正后的柱面镜面形误差的数学模型，并通过优化计算，找出了最佳平衡力的作用点和大小。
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2. Torque is measured by equilibrant method in virtue of torque transducer and torsional angle is measured in virtue of photoelectric coder on conventional experimental machine.
3. Torque is measured by equilibrant method in virtue of torque transducer and torsional angle is measured in virtue of photoelectric coder on conventional experimental machine.
