Temperature compensation method and system for acceleration measurement channel of laser strapdown inertial measurement unit

The invention discloses a temperature compensation method and system for an acceleration measurement channel of a laser strapdown inertial measurement unit. The method comprises the following steps: obtaining a compensation function K0(t) of the output value of each channel of an I/F measuring circuit with the change of temperature before the I/F measuring circuit is connected with an accelerometer to form the acceleration measurement channel, wherein t is the temperature value of the environment where the I/F measuring circuit is located; after the I/F measuring circuit is connected with the accelerometer to form the acceleration measurement channel, acquiring an uncompensated zero-order item output value y0 and a real-time environment temperature value T of each channel of the acceleration measuring channel; and calculating the zero-order term output value y0out of each channel of the acceleration measurement channel after temperature compensation, wherein y0out = y0 - K0(T), and K0(T) is the value of K0(t)