/// <summary>
 /// 窗口关闭事件
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void 机械臂控制软件界面_FormClosed(object sender, FormClosedEventArgs e)
 {
     m_thread.Abort();
     try
     {
         //关闭串口
         robot1.CloseCom();
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message, "串口关闭错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
     CloseMatlab();
     LTDMC.dmc_board_close();
 }